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Author Question: A random sample of 600 high school boys showed that 40 had taken diet pills during the past 30 days ... (Read 156 times)

Haya94

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on: Jul 24, 2018
A random sample of 600 high school boys showed that 40 had taken diet pills during the past 30 days to lose weight The researcher wants to test the hypotheses below for p = the proportion of all high school boys who take diet pills to lose weight. H0: p =0.10 Ha: p  0.10 Report the conclusion in the context of the situation.

Question 2

The distribution of quiz, exam, and course grades is known to be left-skewed. The course grades (measured as percentage scores) in upper level statistics classes have a mean of 68 with a standard deviation of 15 . Suppose 50 course grades are to be randomly selected and the average score in the sample calculated. What is the (approximate) probability that the average score in the sample is more than 5 points removed from the true average of 68?


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LegendaryAnswers

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Reply #1 on: Jul 24, 2018
Answer to Question 1

The proportion of boys who take diet pills to lose weight does not appear to be equal to 10
(p-value = 0.0066).

Answer to Question 2

0.0184


Haya94

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Reply 2 on: Jul 24, 2018
Wow, this really help

xiaomengxian

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Reply 3 on: Yesterday
Thanks for the timely response, appreciate it

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