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Hypothesis & Confidence Statement

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Identical surveys were conducted in 1990 and 2000. One question asked women was "Are most men basically kind, gentle, and thoughtful. The 1990 survey revaled that of the 3000 women surveyed, 2010 said they were. The 2000 survey revealed 1530 of 3000 thought they were. At the .05 level, can we conclude that women think men are less kind, gentle and thoughtful in 2000 compared with 1990?

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Solution Summary

The solution attaches a Word document to explain the conclusions of a survey of whether women thought men are "basically kind, gentle and thoughtful".

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Please see the attached file.

Hypothesis Statement
________________________________________
Identical surveys were conducted in 1990 and 2000. One question asked women was "Are most men basically kind, gentle, and thoughtful. ...

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  • BSc , Wuhan Univ. China
  • MA, Shandong Univ.
Recent Feedback
  • "Your solution, looks excellent. I recognize things from previous chapters. I have seen the standard deviation formula you used to get 5.154. I do understand the Central Limit Theorem needs the sample size (n) to be greater than 30, we have 100. I do understand the sample mean(s) of the population will follow a normal distribution, and that CLT states the sample mean of population is the population (mean), we have 143.74. But when and WHY do we use the standard deviation formula where you got 5.154. WHEN & Why use standard deviation of the sample mean. I don't understand, why don't we simply use the "100" I understand that standard deviation is the square root of variance. I do understand that the variance is the square of the differences of each sample data value minus the mean. But somehow, why not use 100, why use standard deviation of sample mean? Please help explain."
  • "excellent work"
  • "Thank you so much for all of your help!!! I will be posting another assignment. Please let me know (once posted), if the credits I'm offering is enough or you ! Thanks again!"
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