(1 point) A new cream that advertises that it can reduce wrinkles and improve skin was subject to a recent study. A sample of 69 women over theage of 50 used the new cream for 6 months. Of those 69 women, 59 of them reported skin improvement(as judged by a dermatologist). Is thisevidence that the cream will improve the skin of more than 60% of women over the age of 50? Test using a =0.01.(a) Test statistic: z =(b) Critical Value: z* =(c) The final conclusion isOA. There is not sufficient evidence to reject the null hypothesis thatp= 0.6. That is, there is not sufficient evidence to reject that the creamcan improve the skin of more than 60% of women over 50.OB. We can reject the null hypothesis that p0.6 and accept that p > 0.6. That is, the cream can improve the skin of more than 60% ofwomen over 50.

Answered: Image /qna-images/answer/529d5925-3697-40c7-b689-e826e3b7e593.jpg

Answered: (1 point) A new cream that advertises…

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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A common idea is that people can temporarily postponed death to survive a major holiday or important event. A study found that there were 6907 deaths before Thanksgiving and 5739 deaths after Thanksgiving. Test the claim at the 0.05 significance level that the proportion of deaths in the week before Thanksgiving is less that 0.5. Based on your result, does it appear that peole can temporarily postpone death to survive the Thanksgiving holiday?
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Recent results suggest that children with ADHD tend to watch more TV than children who are not diagnosed with the disorder. To examine this relationship, a researcher obtains a random sample of n = 36 children, 8 to 12 years old, who have been diagnosed with ADHD. Each child is asked to keep a journal recording how much time each day is spent watching TV. The average daily time for the sample is M = 4.9 hours. It is known that the average time for the general population of 8 to 12-year-old children is = 4.1 hours with = 1.8. (Hint: Be sure to use the correct test statistic). Are the data sufficient to conclude that children with ADHD watch significantly more TV than children without the disorder? Use a two-tailed test with = .05. (Be sure to give your conclusion, too) If the researcher had used a sample of n = 9 children and obtained the same sample mean, would the results be sufficient to reject H0? (Be sure to give your conclusion, too) Compute Cohen's d for this study. What is…
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