Student Score (Before the Course) Score (After the Course) 1 83 87 2 89 88 3 93 91 4 77 77 5 86 93 6 79 83 A) Determine the null and alternative hypotheses. B) Compute the test statistics. C) At 95% confidence using the p-value approach, test to see if taking the course actually

A researcher is interested in whether people are more or less likely to enjoy popcorn when they are watching TV versus watching a movie. The researcher recruits 12 participants and randomly assigns them to eat popcorn either while watching T or while watching a movie. Then, the researcher measures now much each participant enjoyed the popcorn on a scale from 1 to 10. The researchers' results are shown below: Using the appropriate hypothesis test and the six steps of hypothesis testing, see what the researcher should conclude about the effect of watching television versus watching a movie on people's enjoyment of popcorn. Construct a sampling distribution of means representing the null hypothesis. Specify the sampling distribution's mean and standard error 5. Using a two-tailed alpha of .05 (a = .05), determine the critical values 6. Calculate the test statistic 7. State whether you reject or fail to reject the null hypothesis 8. Calculate and report a measure of effect size . 9. Based…

The contingency table shows the results of a random sample of adults who watch movies on Netflix. At , can you conclude that the type of movie watched is independent of the age of the adult?    Age Type of Movie Watched 18-24 25-34 35-44 45-64 65 + Comedy 38 30 24 10 8 Action 15 17 16 9 5 Drama 12 11 19 25 13 1. State the hypotheses. 2. Calculate the test statistic. 3. Calculate the p-value. 4. Decision: Reject H0 or Fail to Reject H0 5. Conclusion:

According to a recent census, 14.3% of all housing units in a certain country are vacant. A county supervisor wonders if her county is different from this. She randomly selects 893 housing units in her county and finds that 162 of the housing units are vacant. Complete parts a through d below. a) State the hypotheses. Let the proportion of housing units in the county that are vacant be denoted by p. Choose the correct answer below. OA. Ho: p<0.143 HA: P = 0.143 O C. Ho: p=0.143 HA: P<0.143 OB. Ho: p=0.143 HA: P = 0.143 O D. Ho: p20.143 HA: P<0.143 b) Name the model and check appropriate conditions for a hypothesis test. What kind of test is this? Choose the correct answer below. Two-proportion t-test Difference in proportions test Proportional t-test O One-proportion z-test Check the appropriate conditions for a hypothesis test. Select the correct choice below and fill in the answer boxes within your choice. (Round to one decimal place as needed.) successes and nqo = than 10. OA. The…

ts that 33% of their readers own a laptop. A marketing executive wants to test the claim that the percentage is actually less than the reported percentage. A random sample of 220 found that 25% of the readers owned a laptop. Is there sufficient evidence at the 0.05 level to support the executive's claim? To get full credits, justify your answer by following steps given below. a) State the null and alternative hypotheses. b) Find the value of the test statistic. Round your answer to two decimal places. c) Specify if the test is one-tailed or two-tailed. d) Determine the �-value of the test statistic. Round your answer to four decimal places. e) Identify the value of the level of significance. f) Make the decision to reject or fail to reject the null hypothesis. g) State the conclusion of the hypothesis test.

A researcher is interested in whether people are more or less likely to enjoy popcorn when they are watching TV versus watching a movie. The researcher recruits 12 participants and randomly assigns them to eat popcorn either while watching T or while watching a movie. Then, the researcher measures now much each participant enjoyed the popcorn on a scale from 1 to 10. The researchers' results are shown below: Using the appropriate hypothesis test and the six steps of hypothesis testing, see what the researcher should conclude about the effect of watching television versus watching a movie on people's enjoyment of popcorn. 1. What is the appropriate test to use ? 2. List the test's assumptions You do NOT have to test the assumptions. 3. What are the null and alternative hypotheses ? 4. Construct a sampling distribution of means representing the null hypothesis. Specify the sampling distribution's mean and standard error 5. Using a two-tailed alpha of .05 (a = .05), determine the…

chapter 11

A small college has been accused of gender bias in its admissions to graduate programs. a. Out of 500 men who applied, 255 were accepted. Out of 700 women who applied, 240 were accepted. Find the acceptance rate for each gender. Does this suggest bias? b. The college then looked at each of the two departments with graduate programs and found the data below. Compute the acceptance rate within each department by gender. Does this suggest bias?          Department          Men                          Women                      Applied  Admitted      Applied  Admitted Dept A            400          240                100           90 Dept B            100            15                 600          150 c. Looking at our results from Parts a and b, what can you conclude? Is there gender bias in this college’s admissions? If so, in which direction?

Students in a Psychology Stats class gathered 1st and 2nd year university students to gather self-report data on UFO, sightings during the past year. A year later the same students took the survey after taking LSD. The results of the self-report survey are as follows: Participant ID UFO sightings UFO sightings before LSD after LSD 1 1 2 1 3 2 2 4 1 3 3 1 7 3 A) State the Null and Alternative Hypothesis. B) Find the calculated "t" value and the critical "t" value C) State weather to accept or reject the Null Hypothesis

Movie theaters make as much as 85% profit on items sold at the concession stand. Without snacks at the movies, there would be no movies! A theater owner suspected that less than half of his customers purchased food at the concession counter. To examine this claim, a random sample of 80 patrons was selected and 35 of them purchased food.  a. State the hypotheses in symbols and words to test the theater owner's claim. b. Calculate the test statistic c. Calculate the p-value d. Interpret the p-value e. State the conclusion of the test.