k-Means Clustering of Wines. Amanda Boleyn, an entrepreneur who recently sold her start-up for a multi-million-dollar sum, is looking for alternate investments for her newfound fortune. She is considering
Q: ABC Inc., with the province-wide operation for 15 years, is estimated to have about 12.5% the market…
A: Given that,sample size(n)=650success rate ( p )= x/n = 0.158success probability,( po )=0.125failure…
Q: he website Data USA stated that in 2016, Texas had the lowest number of adults with a serious mental…
A: a) Null Hypothesis is H0: µ = 3.26 Alternative hypothesis is Ha: µ < 3.26 (Claim)
Q: Suppose a quarterback's completion percentage for the season is 67.2%. Based on relative frequency,…
A: We have to find Based on relative frequency, is it more likely that he will complete his next two…
Q: Many investors and financial analysts believe the Dow Jones Industrial Average (DJIA) gives a good…
A: From the provided information, Sample size (n) = 58 From which 28 went up. Level of significance (α)…
Q: State the hypotheses. H₂: All the means are equal. H₂: At least one mean is different from the…
A: The quality control department measures weekly values of different suppliers for the percentage…
Q: In June an investor purchased 300 shares of Oracle at $41 per share. In August she purchased an…
A: From the provided information,X be the share price of Oracle.Let, w be the number of shares.
Q: calculate the effect size and round two decimal places
A: Let be the two population means of the reading group and no reading group. Given that,Sample size…
Q: Many investors and financial analysts believe the Dow Jones Industrial Average (DJIA) gives a good…
A: Given : Sample size : n=76 Number of successes : x=21 We are conducting a study if the proportion of…
Q: The median number of part-time employees at fast-food restaurants in a particular city was known to…
A: The median number of part-time employees at fast- food restaurant is 18. There are 7 fast-food…
Q: an article in Forbes magazine reported that 73% of fortune 500 companies have Twitter accounts. A…
A: The provided information are:
Q: Approximately 1.55 percent of people ages 40-50 have breast cancer.* Suppose a person has a 86…
A: Probability is a chance of occurrence of any event.
Q: McDanny's had a very busy summer in 2017, selling a record amount of burgers. Their competitor,…
A: Max 810 upper quartile 650 median 572 lower quartile 429 Min 237 Quartiles: The…
Q: agine you work for the Governor's Anti-Crime Council and you are being asked to prepare a report on…
A: Given: Using the homicide statistics for MA in 2019, which are expressed as percentages, you decide…
Q: Levi-Strauss Co manufactures clothing. The quality control department measures weekly values of…
A: Given the data of weekly values of different suppliers for the percentage difference of waste…
Q: Many investors and financial analysts believe the Dow Jones Industrial Average (DJIA) gives a good…
A: The z test are used to compare the proportion of sample and population. The sample proportion is…
Q: A survey by a magazine stated that 14% of men said they used exercise to reduce stress. A random…
A: from the above datawe are given thatp=0.14n=100x=10p^=xnp^=10100p^=0.10Test…
Q: Lecture(12.13): Researchers were investigating anxiety in first year college students.According to…
A: Given information: Going for a walk/ doing physical activity Listening to music/ watching a…
Q: Researchers examined the influence of a television program on children's aggressiveness. The number…
A: Since we only answer up to 3 sub-parts, I'll answer the 1st 3 sub-parts. Please resubmit the…
Q: Many investors and financial analysts believe the Dow Jones Industrial Average (DJIA) gives a good…
A: From the provided information, The hypotheses can be constructed as: H0: p = 0.30 H1: p > 0.30…
Q: In a survey, respondents were asked to disclose their political affiliation (Democrat, Independent,…
A: Step-by-step software procedure to obtain count using EXCEL is as follows: Choose Insert >…
Q: 5. A professor wanted to predict final exam scores from a midterm exam score. The data is as…
A: We have given that the professor's class score on the Midterm Exam is 77.4. We have to find the…
Q: As such, the final conclusion is that... There is sufficient evidence to warrant rejection of the…
A: For the given situation, Null Hypothesis: H0: The proportion of stocks that went up is not…
Q: Many investors and financial analysts believe the Dow Jones Industrial Average (DJIA) gives a good…
A: It is required to test if the proportion of stocks that went is greater than 0.3 or not. So, the…
Q: Many investors and financial analysts believe the Dow Jones Industrial Average (DJIA) gives a good…
A: The hypotheses for the test are given below. Null hypothesis: H0: p = 0.3 Alternative hypothesis:…
Q: Many investors and financial analysts believe the Dow Jones Industrial Average (DJIA) gives a good…
A: Here α=0.002 n=54 x=19
Q: Researchers have reported that elderly people who own pets are less likely to visit the doctor after…
A: Given information: Pet owners No pets 8 10 1 5 3 10 3 7 4 5 3 4 5 9 2 6 11 12…
Q: In 2008, as an advertising campaign, the Nabisco Company announced a "1200 Chips Challenge,"…
A: Obtain the 95% confidence interval for the population mean number of chips in a bag of chips Ahoy…
Q: C. What is Wisconsin rank-sum test value, at the 0.05 significance level? ( round your decimal to 2…
A: First, we put both samples together and organize it in ascending order, which is shown in the table…
Q: Many investors and financial analysts believe the Dow Jones Industrial Average (DJIA) gives a good…
A: Solution: State the hypotheses Null hypothesis: That is, the proportion of stocks that went up is…
Q: Many investors and financial analysts believe the Dow Jones Industrial Average (DJIA) gives a good…
A: Given : The null and Hypothesis are states as Ho: p=0.3 vs Ha: p<0.3 Significance level α=0.002…
Q: Many investors and financial analysts believe the Dow Jones Industrial Average (DJIA) gives a good…
A: Givensample size(n)=64x=12significance level(α)=0.02sample proportion(p^)=xn=1264=0.1875
Q: Many investors and financial analysts believe the Dow Jones Industrial Average (DJIA) gives a good…
A: The test statistic for this sample is, Thus, the test statistic is 1.022.
Q: You decide to invest in stock in a particular type of company and set the guideline that you will…
A: Given data: Criteria for buying stock: Companies that are ranked 80th percentile or above. Rank of a…
Q: You read a study about how opioid addiction can only be treated by addiction centers. It was paid…
A: Yes I Think this study is valid because as we already know that opioid addiction can only be treated…
Q: Many investors and financial analysts believe the Dow Jones Industrial Average (DJIA) gives a good…
A:
Q: 4) Give a real-life example of a time when it would be better to use the median instead of the mean.…
A: Solution-: Give a real life example of a time when it would be better to use the median instead of…
Q: he website Data USA stated that in 2016, Texas had the lowest number of adults with a serious mental…
A: Given Information : The website Data USA stated that in 2016, Texas had the lowest number of adults…
Q: Researchers conducted a study to determine whether there were significant differences in graduation…
A: Given that, probability, p= 96% = 0.96 So q= 1-p= 1-0.96= 0.04 And sample size is n= 13 So X~…
Q: True or False The PEW Researcher center based on a sample of 10,000 recent college graduates says…
A: We need to find whether the given statements are true.
Q: Many investors and financial analysts believe the Dow Jones Industrial Average (DJIA) gives a good…
A:
Q: Two scanners, Brand A and Brand B, are both designed to detect forged cinema tickets. To determine…
A: Disclaimer: Since you have asked multiple questions, we will solve the first question for you. If…
Q: An ecology class used binoculars to watch 23 turtles at Walden Pond. It was found that 18 were box…
A: observational study : This is a type of study in which individuals are observed or measured.No…
k-Means Clustering of Wines. Amanda Boleyn, an entrepreneur who recently sold
her start-up for a multi-million-dollar
sum, is looking for alternate investments for her
newfound fortune. She is considering an investment in wine, similar to how some people
invest in rare coins and fine art. To educate herself on the properties of fine wine, she has
collected data on 13 different characteristics of 178 wines. Amanda has applied k-means
clustering to this data for k 5 1, . . . , 10 and generated the following plot of total sums
of squared deviations. After analyzing this plot, Amanda generates summaries for k 5 2,
3, and 4. Which value of k is the most appropriate to categorize these wines? Justify your
choice with calculations.
Trending now
This is a popular solution!
Step by step
Solved in 2 steps with 8 images
- 21. Tweet tweet: An article in Forbes magazine reported that 73% of Fortune 500 companies have Twitter accounts. A economist thinks the percentage is higher at technology companies. She samples 70 technology companies and finds that 55 of them have Twitter accounts. Can she conclude that more than 73% of technology companies have Twitter accounts? Use the a = 0.05 level of significance.Many investors and financial analysts believe the Dow Jones Industrial Average (DJIA) gives a good barometer of the overall stock market. On January 31, 2006, 9 of the 30 stocks making up the DJIA increased in price (The Wall Street Journal, February 1, 2006). On the basis of this fact, a financial analyst claims we can assume that 30% of the stocks traded on the New York Stock Exchange (NYSE) went up the same day.A sample of 52 stocks traded on the NYSE that day showed that 18 went up.You are conducting a study to see if the proportion of stocks that went up is is significantly more than 0.3. You use a significance level of α=0.10What is the test statistic for this sample? Use ˆpp^ rounded to 4 decimal places. (Report answer accurate to 4 decimal places.)test statistic = What is the p-value for this sample? (Report answer accurate to 4 decimal places.)p-value = The p-value is... less than (or equal to) α greater than α This p-value leads to a decision to... reject the null…By a small margin, Facebook remains the top choice of social media over all ages, with 29% using Facebook most often among those using social media sites. However, more visually oriented social networks such as Snapchat and Instagram continue to draw in younger audiences. When asked "Which one social networking brand do you use most often?" the results in the table show the top brands chosen by Americans aged 12-34 who currently use any social networking site or service. Social M edia Site Faceboo k Snapchat Instagra m Twitter Percentage That Use Most Often 29 28 26 6 20 (a) What is the sum of the percentages for these top social media sites? Give your answer as an exact number. Macmillan Learning top social media sites: What percent of Americans aged 12-34 use other social media sites most often? Give your answer as an exact number. other social media sites: do %
- Many investors and financial analysts believe the Dow Jones Industrial Average (DJIA) gives a good barometer of the overall stock market. On January 31, 2006, 9 of the 30 stocks making up the DJIA increased in price (The Wall Street Journal, February 1, 2006). On the basis of this fact, a financial analyst claims we can assume that 30% of the stocks traded on the New York Stock Exchange (NYSE) went up the same day. A sample of 71 stocks traded on the NYSE that day showed that 24 went up. You are conducting a study to see if the proportion of stocks that went up is is significantly more than 0.3. You use a significance level of a = 0.01. What is the test statistic for this sample? (Report answer accurate to three decimal places.) test statistic = What is the p-value for this sample? (Report answer accurate to four decimal places.) p-value = The p-value is... less than (or equal to) a greater than a This test statistic leads to a decision to... reject the null accept the null fail to…Many investors and financial analysts believe the Dow Jones Industrial Average (DJIA) gives a good barometer of the overall stock market. On January 31, 2006, 9 of the 30 stocks making up the DJIA increased in price (The Wall Street Journal, February 1, 2006). On the basis of this fact, a financial analyst claims we can assume that 30% of the stocks traded on the New York Stock Exchange (NYSE) went up the same day.A sample of 64 stocks traded on the NYSE that day showed that 24 went up.You are conducting a study to see if the proportion of stocks that went up is significantly more than 0.3. You use a significance level of α=0.01α=0.01.What is the test statistic for this sample? (Report answer accurate to three decimal places.)test statistic = What is the p-value for this sample? (Report answer accurate to four decimal places.)p-value = The p-value is... less than (or equal to) αα greater than αα This test statistic leads to a decision to... reject the null accept the null fail to…Approval 2008. Of all the post–World War II presidents,Richard Nixon had the highest disapproval rating near theend of his presidency. His disapproval rating peaked at 66% in July 1974, just before he resigned. This percent-age has been considered by some pundits as a high water mark for presidential disapproval. However, in April 2008,George W. Bush’s disapproval rating peaked at 69%,according to a Gallup poll of 1016 voters. Pundits starteddiscussing whether his rating was discernibly worse thanthe previous high water mark of 66%. What do you think?
- The website Data USA stated that in 2016, Texas had the lowest number of adults with a serious mental illness with an average of M=3.26% of the population affected. The state of Texas wants to test if they have a significantly decreased number of mental illness patients compared with the states with the (n=8) highest level of mental illness found. In 2016 the following states had the highest level of adult patients with mental illness: Arkansas= 5.45%, Montana=5.34%, Vermont=5.32%, Oregon=5.19%, Utah=5.2%, Ohio=5.13, Kentucky=5.25% West Virginia=5.18%. The alpha level for the study was set to α=.05 for the criteria. a. State the hypotheses of the study. b. Find the critical t value for this study c. Compute the one-sample t test. (Again calculate sample SD or s - and get SEM before calculating t.) d. Compute the Cohen's d for the data (even if not significant) e. State the results - is the sample significantly higher? Do you reject the null hypothesis? Report the t test results in APA…Many investors and financial analysts believe the Dow Jones Industrial Average (DJIA) gives a good barometer of the overall stock market. On January 31, 2006, 9 of the 30 stocks making up the DJIA increased in price (The Wall Street Journal, February 1, 2006). On the basis of this fact, a financial analyst claims we can assume that 30% of the stocks traded on the New York Stock Exchange (NYSE) went up the same day. A sample of 72 stocks traded on the NYSE that day showed that 12 went up. You are conducting a study to see if the proportion of stocks that went up is significantly less than 0.3. You use a significance level of a = 0.005. What is the test statistic for this sample? (Report answer accurate to three decimal places.) test statistic = What is the p-value for this sample? (Report answer accurate to four decimal places.) p-value = The p-value is... O less than (or equal to) a O greater than a This test statistic leads to a decision to... O reject the null O accept the null O…Many investors and financial analysts believe the Dow Jones Industrial Average (DJIA) gives a good barometer of the overall stock market. On January 31, 2017, 9 of the 30 stocks making up the DJIA increased in price.On the basis of this fact, a financial analyst claims we can assume that 76% of the stocks traded on the New York Stock Exchange (NYSE) went up the same day. A sample of 61 stocks traded on the NYSE that day showed that 43 went up. You are conducting a study to see if the proportion of stocks that went up is significantlysmaller than 76%. You use a significance level of α=0.01α=0.01. For this study, we should use Select an answer 2-SampTInt 2-PropZInt 1-PropZInt T-Test χ²GOF-Test 2-SampTTest 2-PropZTest TInterval ANOVA 1-PropZTest χ²-Test The null and alternative hypotheses would be: H0H0: ? p μ Select an answer > = < ≠ (please enter a decimal) H1H1: ? p μ Select an answer ≠ = > < (Please enter a decimal) The test statistic =…
- For effective learning, an instructor advised his students to practice solving statistical problems on StatCrunch, a web-based software, at least 7 hours per week. In an in class activity, a student surveyed 15 of her 35 classmates to assess the number of hours they spend per week practicing statistics on StatCrunch. The following data was collected: 6.5, 4, 3.5, 0, 12, 5, 12, 15, 12, 0, 1, 8, 0.5, 2, 7. Is there strong evidence that the mean number of hours of StatCrunch usage in the entire class is larger than 7? Let the confidence level be 95% Find the mean Standard deviation T / z score Find the critical score Draw the normal curve with critical tscore and test statistic. Make a conclusionMany investors and financial analysts believe the Dow Jones Industrial Average (DJIA) gives a good barometer of the overall stock market. On January 31, 2006, 9 of the 30 stocks making up the DJIA increased in price (The Wall Street Journal, February 1, 2006). On the basis of this fact, a financial analyst claims we can assume that 30% of the stocks traded on the New York Stock Exchange (NYSE) went up the same day. A sample of 67 stocks traded on the NYSE that day showed that 10 went up. You are conducting a study to see if the proportion of stocks that went up is is significantly less than 0.3. You use a significance level of a = 0.005. What is the test statistic for this sample? (Report answer accurate to three decimal places.) test statistic = What is the p-value for this sample? (Report answer accurate to four decimal places.) p-value = The p-value is... | less than (or equal to) a greater than a This test statistic leads to a decision to... O reject the null |accept the null O…Kris works for the MESA Air Pollution Study at UW, and studies the correlation be- tween air pollution and the disease atherosclerosis. Nationally, 40% of adults suffer from atherosclerosis. Kris suspects that the proportion of people with atherosclerosis in high- pollution areas is higher. In a random sample of 600 residents of high-pollution areas, he finds that 270 (45%) subjects have atherosclerosis. At the 1% level (α = .01), is this good evidence that people in high-pollution areas are more likely to have atherosclerosis? (a) Which of the following is the Ha ? (research claim or alternate) A. Ha : p ≥ 0.40 B. Ha : pb ≥ 0.40 C. Ha : p > 0.40 D. Ha : p > b 0.40 E. Ha : p > b 0.45 F. Ha : p > 0.45 G. Ha : pb ≥ 0.45 H. Ha : p ≥ 0.45 I. None of these Hint: First read the problem and using my notes (or Hawkes) for 9.1, set up H0 and Ha . Then pick the right Ha from the above list. Dont try to guess the answer from the above list. (b) Which of the…
