The mean price of a cup of coffee in Portland, OR is $3.59. The owner of a new coffee house believes that the mean price of coffee is different in their neighborhood. A sample of 10 coffee prices from other local coffee shops in their area are shown below.\[\begin{array}{ccc}3.55 & 3.3 & 3.6 \\4.75 & 3.3 & 3.7 \\4.35 & 2.75 & 2.25 \\3.5 & & \\\end{array}\]Test the claim that the mean price of a cup of coffee is not equal to $3.59 using a 5% significance level. Assume that the coffee prices are normally distributed.Fill in the hypotheses below:\[H_0: \ \text{Select an answer} \ ?\ \$ \]\[H_a: \ \text{Select an answer} \ ?\ \$\]

From the given information, The claim of the situation is mean price of a cup of coffee is not equal…

Answered: Test the claim that mean price of a cup…

MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

Section: Chapter Questions

Problem 1P

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The stem-and-leaf plot below shows how many minutes are spent sanitizing the kitchen at several similar-sized restaurants in a particular area. Which of the following conclusions is the strongest based on the given data? Stem Leaf 689 1 2559 0133688 3 1222579 4 0 24667 7 2457 O Sanitizing time is similar for most restaurants in the area. O A few restaurants spend much more time sanitizing than the others. O Each restaurant could use extra sanitizing time. O Each restaurant should spend at least 70 minutes sanitizing the kitchen. LO
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The accompanying data table compares the prices of some kitchen staples at two grocery stores, A and B. Complete parts (a) to (d). LOADING... Click the icon to view the data table. a. At the 0.10 level of significance, is there evidence of a difference in the mean prices between store A and store B? Let μ1 be the mean price at store A and μ2 be the mean price at store B. Determine the null and alternative hypotheses for this test. A. H0: μD=0 (where μD=μ1−μ2) H1: μD≠0 B. H0: μD≥0 (where μD=μ1−μ2) H1: μD<0 C. H0: μD≠0 (where μD=μ1−μ2) H1: μD=0 D. H0: μD≤0 (where μD=μ1−μ2) H1: μD>0 The test statistic is tSTAT=enter your response here. (Round to two decimal places as needed.) The critical value(s) is(are) enter your response here. (Use a comma to separate answers as needed. Round to two decimal places as needed.) Since the test statistic ▼ the critical value(s), ▼ reject…
Suppose that a certain paper included the accompanying data on the tar level of cigarettes smoked for a sample of male smokers who died of lung cancer. Tar Level Frequency Low 108 Medium 383 High 568 Very high 155 Assume that the sample is representative of male smokers who die of lung cancer. Calculate the value of the ?2 test statistic that could be used to test whether the proportions of male smoker lung cancer deaths are not equal for all of the four tar level categories. The expected values are 303.5 for each of the four cells. (Round your answer to three decimal places.) ?2 =
Which of the following statements regarding Z scores is FALSE? a. It indicates whether the raw score is above or below average. b. It indicates whether or not a distribution is skewed. c. It indicates the percentage of cases between that score and the mean d. It is sometimes referred to as a standard score
2. Which of the following are practical ways to assess normality of the residuals? Select all that apply a. Normal probability plots (the R command is qqnorm() b. Anderson-Darling tests. c. Shapiro-Wilks tests. d. Boxplots e. Just ask if they are normal, or, guess, because, who really cares?
An employment information service claims the mean annual salary for senior level product engineers is $96,000. The annual salaries (in dollars) for a random sample of 16 senior level product engineers are shown in the table to the right. At a=0.10, test the claim that the mean salary is $96.000. Complete parts (a) through (e) below. Assume the population is normally distributed (a) Identify the claim and state Ho and H₂. Ho Y M H₂ N ▼ (Type integers or decimals. Do not round.) The claim is the hypothesis. (b) Use technology to find the critical value(s) and identify the rejection region(s). The critical value(s) is/are to (Use a comma to separate answers as needed. Round to two decimal places as needed.). Choose the graph which shows the rejection region О А. 15-6.176 4 -ho to Q Q (c) Find the standardized test statistic, t The standardized test statistic is t- (Round to two decimal places as needed.) (d) Decide whether to reject or fail to reject the null hypothesis. Ho because the…
An experimental diet to induce weight loss was followed for one week by a randomly selected group of 12 students with the following results. Loss in Pounds Student 1 2 3 5 6 7 8 9 10 11 12 2.5 2.9 0.4 1.7 0.0 1.5 5.5 3.5 3.9 3.5 1.1 2.9 (a) Find a point estimate for the average amount lost after one week on this diet. 2.55 ]x Is this an unbiased estimate of the population mean? Explain. Yes, this an unbiased estimate of the population mean, since E(X) = µ. Yes, this an unbiased estimate of the population mean, since E(X) + μ. O No, this is not an unbiased estimate of the population mean, since E(X) * μ. O No, this is not an unbiased estimate of the population mean, since E(X) = μ. O No, this is not an unbiased estimate of the population mean, since the sample size is too small. (b) Find a point estimate for the variance of the amount lost on this diet. (Round your answer to four decimal places.) 2.3264 x Is this an unbiased estimate of the population variance? Explain. Yes, this an…
Samples of starting annual salaries for individuals entering the public accounting and financial planning professions follow. Annual salaries are shown in thousands of dollars. Public Accountant 51.2 57.8 57.3 58.2 53.2 55.0 51.9 58.5 57.0 52.9 Financial Planner 49.0 50.2 54.1 54.9 52.9 Find the value of the test statistic. W = 137.5 53.6 49.7 53.9 52.8 48.9 (a) Use a 0.05 level of significance and test the hypothesis that there is no difference between the starting annual salaries of public accountants and financial planners. State the null and alternative hypotheses. O Ho: Median salary for public accountants - Median salary for financial planners ≤ 0 H₂: Median salary for public accountants - Median salary for financial planners > 0 Ho: The two populations of salaries are identical. H₂: The two populations of salaries are not identical. O Ho: Median salary for public accountants - Median salary for financial planners 20 H₂: Median salary for public accountants - Median salary for…
The following table shows the results of a survey focused on alcohol use among teen girls. Is there a significant relationship between race and trying alcohol among teen girls? Assume race is the independent variable. Add appropriate percentages to the table. a. Write one sentence describing the pattern you see, using specific percentages. b. State the null and research hypotheses c. Calculate the appropriate test statistic. d. What is the critical value at which p<.05? e. What do you conclude?
A middle school teacher believes that a reading rewards program results in a higher number of pages read per year after the program is completed. The teacher chooses a simple random sample of students and records the number of pages read per year before starting the program and after the program is completed. The results of the study are below What are the population parameters? Pick Before 813.25 192250.25 182875.22 After 904.95 What is the level of significance? Ex: 0.12 Mean Variance Observations Hypothesized Mean Difference 100 100 Is the two-sample hypothesis test a paired or unpaired t-test? Pick 198 t Stat P[T< t) one-tail tCitical one-tail P[T<=t) two-tail t Critical two tal Confidence Level What is the null hypothesis Ho? Pick 0.068 1.653 What is the alternative hypothesis H.? Pick 1.972 95% Should Ho be rejected or does Ho fail to be rejected? Pick What conclusion can be drawn from the data? Pick v evidence exists to support the claim that the mean number of pages read per…

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Test the claim that mean price of a cup of coffee is not equal to $3.59 using a 5 % significance le Assume that the coffee prices are normally distributed. Fill in the hypotheses below: