Answer 8.144 8.144 The "Pepsi challenge." "Take the Pepsi Challenge" was a marketing campaign used by thePepsi-Cola Company. Coca-Cola drinkers participated in a blind taste test in which they tastedunmarked cups of Pepsi and Coke and were asked to select their favorite. Pepsi claimed that "inrecent blind taste tests, more than half the Diet Coke drinkers surveyed said they preferred thetaste of Diet Pepsi." Suppose 100 Diet Coke drinkers took the Pepsi Challenge and 56 preferredthe taste of Diet Pepsi. Test the hypothesis that more than half of all Diet Coke drinkers will selectDiet Pepsi in a blind taste test. Use a = .05.

Given : number of success , x= 56.0 sample size, n = 100 Claim : more than half of all Diet…

Answered: 8.144 The "Pepsi challenge." "Take the…

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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An insurance investigator has observed that people with some astrological signs tend to be safer drivers than people with other signs. Using insurance records, the investigator classified 150 people according to their astrological signs and whether or not they were involved in a car accident during the previous 12 months. Do the following data indicate a significant relationship between sign and accidents? Test with a = .05. Libra Leo Gemini Accident 7 4 19 No Accident 73 46 1
I'm having issue with E because I don't know the p-value
A researcher believes that there is a difference in how cautious male stray cats and female stray cats are when approaching people. He knows that the stray cat population is 50% male and 50% female. In order to test this hypothesis, he visits 15 different areas where stray cats live and records the gender of the first cat to approach him. He finds that 11 of the 15 cats that approach him are male. Using a sign test and an alpha of .05: Calculate the p-vlaue (or significance) of the obtained value (Hint: in a two - tailed test make sure to double the p-value).
Question #4. US Universities found that 72% of people are concerned about the possibility that their personal records could be stolen over the Internet. If a random sample of 300 college students at a Midwestern university were taken and 228 of them were concerned about the possibility that their personal records could be stolen over the Internet, could you conclude at the 0.025 level of significance that a higher proportion of the university's college students are concerned about Internet theft than the public at large? Report the p-value for this test. Z0.025 = 1.96
Based on a survey of a random sample of 900 adults in the United States, a journalist reports that A random sample of 100 movie goers was asked to state his or her gender and favorite soft drink available at the local movie theater. The results appear in the table below. Is there a relationship between gender and soft drink preference? Coke Diet Coke Sprite Male 23 11 12 Female 16 28 10 To analyze the results, which of the following tests is most appropriate? A)Chi-square test of independence B)Chi-square test of homogeneity C)Two sample t-test D)Matched pair t-test E)Chi-square goodness of fit
Strack, Martin, and Stepper (1988) reported that people rate cartoons as funnier when holding a pen in their teeth (which forced them to smile) than when holding a pen in their lips (which forced them to frown). A researcher attempted to replicate this result using a sample of adults between the ages of 40 and 45. For each person, the researcher recorded the difference between the rating obtained while smiling and the rating obtained while frowning. On average the cartoons were rated as funnier when the participants were smiling, with an average difference of with . Do the data indicate that the cartoons are rated significantly funnier when the participants are smiling? Use a one-tailed test with . Compute to measure the size of the treatment effect. Write a sentence describing the outcome of the hypothesis test and the measure of effect size as it would appear in a research report.
andres asked if there is a relationship between the quality of sneakers worn by a sample of 20 volleyball players and their average number of point scored per game. he computed r= +.21 and immediately claimed he had evidence that better-quality sneakers are related to better performance (a) is his claim correct? why? (b) what are Ho and Ha? (c) with alpha=.05, what is rcrit ?
25. The State of California claims the population average of the amount of ice cream each Californian eats in the month of September is 6.85 pints with population standard deviation of 1.35 pints. An SRS of 500 Californians resulted in a sample average of 6.75 pints eaten per person in the month of September . At alpha=0.05, is there evidence to support the State of California's claim that Californians eat an average of 6.85 pints of ice cream in the month of September? Write a conclusion using the context of the problem.
A research team collected data on the time college students spent on an ordinary homework assignments, and is interested in finding out whether Temple University students dedicate more time to homework than what was reported in a nationwide survey of undergraduates. A)Identify the dependent (DV) variable B) Identify the levels of the independent variable (IV) C)Indicate whether the researcher’s hypothesis is directional or non-directional D)Write the null and research hypotheses (H0 and H1) in your own words
Ten subjects were given an attitude test on a controversial issue. Then they were shown a film favorable to the ten subject and the same attitude test was administered. Make a directional test at alpha 5%. *
24. The State of California claims the population average of the amount of ice cream each Californian eats in the month of September is 6.85 pints with population standard deviation of 1.35 pints. An SRS of 500 Californians resulted in a sample average of 6.75 pints eaten per person in the month of September. At alpha = 0.05 , is there evidence to support the State of California's claim that Californíans eat an average of 6.85 pints of ice cream in the month of September? True or False : Since the p-value is greater than alpha we fail to reject the null hypothesis. True False
23. The State of California claims the population average of the amount of ice cream each Californian eats in the month of September is 6.85 pints with population standard deviation of 1.35 pints. An SRS of 500 Californians resulted in a sample average of 6.75 pints eaten per person in the month of September At alpha = 0.05 , is there evidence to support the State of California's claim that Californians eat an average of 6.85 pints of ice cream in the month of September? Find the p-value ?

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