Test whether there is an association between the number of people in the household (Q5) and the total number of cars belonging to the household (Q7) at 0.05 significance level.
Q: 1. A premed student in statistics class wants to test the claim that the mean body temperature is…
A: X (x-xbar)^2 98 0.13071 97.5 0.742249 98.6 0.056864 98.8 0.192249 98 0.13071 98 0.13071…
Q: a) What is the level of significance? State the null and alternate hypotheses. H0: ? = 13.5; H1: ?…
A: Let μ be the population mean average mileage driven. Given that, Population mean (μ) = 13.5…
Q: Assume that matched pairs of data from a poll of Internet users who were asked if they make travel…
A: +ve sign = 308-ve sign = 421ties = 30Total = 308+421+30 = 759significance level 0.05
Q: when is the significance level determined
A: The significance level defines that the probability of rejecting the null hypothesis when it is…
Q: The power of a test is 0.873. What is the probability of a Type II error?
A: Power of a test is the probability of correctly rejecting H0 that is the null hypothesis and Type 2…
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Q: A study was conducted to determine the proportion of people who dream in black and white instead of…
A: Hi! Thank you for the question, As per the honor code, we are allowed to answer three sub-parts at a…
Q: Assume that matched pairs of data from a poll of Internet users who were asked if they make travel…
A: Assume that matched pairs of data from a poll of Internet users who were asked if they make travel…
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A: From the provided information, Sample size (n) = 54 Out of which 35 involved an intoxicated driver.…
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A: It is given as the survey data in the tabulated form.The total number of animals = 117
Q: A Michigan study concerning preference for outdoor activities used a questionnaire with a six-point…
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A: Given Information: Male: Sample size (n1) = 1343 Sample proportion (p^1) = 10% = 0.10 Female: Sample…
Q: 3) A report on the nightly news broadcast stated that 10 out of 108 households with pet dogs were…
A: Given data A report on the nightly news broadcast stated that 10 out of 108 house holds with pet…
Q: A Michigan study concerning preference for outdoor activities used a questionnaire with a six-point…
A: We have given that Sample size n1= 44 , n2= 52 Sample mean xbar1 = 4.9 , xbar2 = 5.7 Known standard…
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A: Let p be the population proportion p=majority=1/2=0.50=50%, n=1200, p^=sample…
Q: A Michigan study concerning preference for outdoor activities used a questionnaire with a six-point…
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Q: Based on information from the Federal Highway Administration web site, the average annual miles…
A: Consider that μ is the national average of the mileage.
Q: Referring to Table 1, at a significance level of 1%, 1) there is sufficient evidence to conclude…
A: It is given that In analysis of variance output table, we get Fcritical = 3.238867 P-value =…
Q: 6. A company wants to determine if it it offers to them. A sample of 200 testing to test the claim…
A: The hypotheses can be constructed as: H0: Employees does not have preference. HA: Employees have…
Q: A Michigan study concerning preference for outdoor activities used a questionnaire with a six-point…
A: The level of significance is 0.05.
Q: A Michigan study concerning preference for outdoor activities used a questionnaire with a six-point…
A: Given: n1 = 47 X1 = 4.9 σ1 = 1.2 n2 = 43 X2 = 5.5 σ2 = 1.4 α = 0.05 Formula Used: Test-statistic Z =…
Q: ative signs, and 29 ties when the value of the second variable is subtracted from the corresponding…
A: Given: There are 317 positive results from the matched pairs of data from a survey of internet users…
Q: Assume that matched pairs of data from a poll of Internet users who were asked if they make travel…
A: The objective is to test the null hypothesis of no difference by using sign test at 0.05 level of…
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A: sample size, n = 55 companies
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Q: A Michigan study concerning preference for outdoor activities used a questionnaire with a six-point…
A: Given information- Significance level, α = 0.05 We have given two samples- For sample 1- Sample…
Q: A Michigan study concerning preference for outdoor activities used a questionnaire with a six-point…
A:
Q: 17. According to the CDC website, 59% of 18 to 25 year-olds in the United States drink alcohol.…
A: Given,n=149x=100p^=xnp^=100149=0.6711α=0.05H0:P=0.59H1:P≠0.59
Q: er the age of 18 who eat dinner toget than the level of significance. Theref an the level of…
A: Given data number of success , x= 515.0 sample size, n = 1172 population…
Q: b) A test of 80 youths and 120 adults showed that 18 of the youths and 10 of the adults were…
A: Given: The sample number of youths are n1=80. The sample number of adults are n2=120. The number of…
Q: Suppose that Sandy is an analyst for the bicyling industry and wants to estimate the asking price of…
A: n=10,X¯=659.87,s=197.02,α=0.05
9) Test whether there is an association between the number of people in the household (Q5) and the total number of cars belonging to the household (Q7) at 0.05 significance level.
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- A researcher gathered a sample of participants who volunteered for a studying of phobias. She measured anxiety level of participants as they viewed photos of spiders and again when they viewed puppies. Which statistical test is appropriate for this study and why?A Michigan study concerning preference for outdoor activities used a questionnaire with a six-point Likert-type response in which 1 designated "not important" and 6 designated "extremely important." A random sample of n1 = 44 adults were asked about fishing as an outdoor activity. The mean response was x1 = 4.9. Another random sample of n2 = 49 adults were asked about camping as an outdoor activity. For this group, the mean response was x2 = 4.1. From previous studies, it is known that ?1 = 1.5 and ?2 = 2.0. Does this indicate a difference (either way) regarding preference for camping versus preference for fishing as an outdoor activity? Use a 5% level of significance. Note: A Likert scale usually has to do with approval of or agreement with a statement in a questionnaire. For example, respondents are asked to indicate whether they "strongly agree," "agree," "disagree," or "strongly disagree" with the statement.A case-control (or retrospective) study was conducted to investigate a relationship between the colors of helmets worn by motorcycle drivers and whether they are injured or killed in a crash. Results are given in the accompanying table. Using a 0.01 significance level, test the claim that injuries are independent of helmet color. D Black Color of Helmet Yellow 32 Blue White 331 Controls (not injured) Red 159 482 100 Cases (injured or 211 109 8 65 47 killed) Click here to view the chi-square distribution table. Identify the null and alternative hypotheses. Choose the correct answer below. O A. Ho: Whether a crash occurs and helmet color are dependent H₁: Whether a crash occurs and helmet color are independent OB. Ho: Injuries and helmet color are dependent H₁: Injuries and helmet color are independent OC. Ho: Whether a crash occurs and helmet color are independent H₁: Whether a crash occurs and helmet color are dependent O D. Ho: Injuries and helmet color are independent H₁: Injuries…
- 11. In professional tennis for 2017 men challenged 2100 calls and 1105 of them were changed. While women challenged 1309 calls and 625 of them were changed. Conduct a hypothesis test to test the claim that men get more calls changed than women. Use a significance level of 0.05.5. The Instagram handle @getfollowers claims that they can increase the number of followers someone has on Instagram. In March 2015 the mean number of followers for a US teen was 150, so a random sample of 12 US teens with 150 followers was taken. The following is the number of followers, which is normally distributed, these US teens had after they paid @getfollowers for their help. Using a 0.01 level of significance, determine whether @getfollowers is effective at increasing the number of Instagram followers. 160 200 152 150 145 151 162 158 156 149 154 170 Null and Alternative HypothesisMitchell works in the produce section at a small local supermarket and would like to test whether the proportion of apples people purchase is the same for each season, using a significance level of 0.05. He analyzes the apple purchases each season for a year and records his findings in the following table. Season Spring Summer Fall Winter Total --------- --------- ------ ------ ------- # of apples purchased 896 934 934 971 3735 (a) In performing this statistical test, state the hypotheses. O Ho: the proportion of customers is the same each season vs. HA: the proportion of customers is not the same each season O Họ: the distribution of apples people purchased is not the same for each season vs. HẠ: the distribution of apples people purchased is the same for each season O Họ: the observed number of apples people purchased is the same for each season vs. Ha: the observed number of apples people purchased is not the same for each season O Họ; the distribution of apples people purchased is…
- Assume that matched pairs of data from a poll of Internet users who were asked if they make travel plans through the Internet result in 373 positive signs, 333 negative signs, and 22 ties when the value of the second variable is subtracted from the corresponding value of the first variable. Use the sign test with a 0.10 significance level to test the null hypothesis of no difference. Let ₁ denote the median of the first variable and 12 denote the median of the second variable. Wha are the null and alternative hypotheses? A. Ho: 1₁ #1₂ H₁:1₁ =11₂ C. Ho: 1₁ =1₂ H₁:1₁ <1₂ Find the test statistic. Test statistic = needed.) OB. Ho: 1₁ 2112 H₁:1₁ <1₂ D. Ho: 1₁ =112 H₁:1₁ #1₂ (Round to two decimal places asWhat is the correct way to write the conclusion of a two-tailed Two-Sample T-Test for Mean in APA format? Group of answer choices: A. There isn't a significant difference in the average final exam score between the synchronous class and asynchronous class, t(18) = 1.20. B. There isn't a significant difference in the average final exam score between the synchronous class and asynchronous class. C. There isn't a significant difference in the average final exam score between the synchronous class and asynchronous class, t(18) = 1.20, p = .25. D. There isn't a significant difference in the average final exam score between the synchronous class and asynchronous class, t(18) = 1.20, p = .25, 95% CI [-1.52, 5.52].In a previous poll, 38% of adults with children under the age of 18 reported that their family ate dinner together seven nights. suppose that, in a more recent poll, 399 of 1099 adults with children under the age of 18 reported that their family ate dinner together seven nights a week. is there sufficient evidence that the proportion of families with children under the age of 18 who eat diner together seven nights a week has decreased? use the a=0.05 significance level
- 12. Many studies have been conducted to test the effects of marijuana use on mental abilities. In one such study, groups of light and heavy users of marijuana in colleges were tested for memory recall, with the results given below. Use a 0.01 significance level to test the claim that the population of heavy marijuana users has a lower mean than the light users. Should marijuana use be of concern to college students? Light marijuana users: n = 64, x = 53.3, s = 3.6 Heavy marijuana users: n = 65, x = 51.3, s = 4.52. A principal of high school was concerned with amount of time her students devote to working at after-school jobs. She randomly selected 25 students, obtained their working hours for 1 week and computed x = 12.5 hours and s = 4.5 hours. She claims that her students work significantly more than the mean of 10.7 hours from a study conducted by the National Association of State High School Association. Test her claim by using the 5% level of significance.A Michigan study concerning preference for outdoor activities used a questionnaire with a six-point Likert-type response in which 1 designated "not important" and 6 designated "extremely important." A random sample of n1 = 41 adults were asked about fishing as an outdoor activity. The mean response was x1 = 4.9. Another random sample of n2 = 50 adults were asked about camping as an outdoor activity. For this group, the mean response was x2 = 5.7. From previous studies, it is known that ?1 = 1.6 and ?2 = 1.5. Does this indicate a difference (either way) regarding preference for camping versus preference for fishing as an outdoor activity? Use a 5% level of significance.Note: A Likert scale usually has to do with approval of or agreement with a statement in a questionnaire. For example, respondents are asked to indicate whether they "strongly agree," "agree," "disagree," or "strongly disagree" with the statement. (a) What is the level of significance? .05 State the null and alternate…
