40 married couples without children are asked to report the number of times per year they initiate a date night. The men report initiating an average of 9.3 date nights with a standard deviation of 4. Is there significant evidence to conclude that married men without children initiate date night more than 8 times per year at the 0.01 significance level? Note that there's evidence that this distribution is skewed.

MATLAB: An Introduction with Applications
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40 married couples without children are asked to report the number of times per year they initiate a date night. The men report initiating an average of 9.3 date nights with a standard deviation of 4. Is there significant evidence to conclude that married men without children initiate date night more than 8 times per year at the 0.01 significance level? Note that there's evidence that this distribution is skewed.

What level of concern do you have for the validity of your results?

  • Questionable −- there is likely to be some nonresponse bias, but at least n>30
  • Questionable −- there is likely to be some response bias and, while n>30, the skewness in the distribution is concerning
  • Questionable −- there is likely to be some response bias, but at least n>30
  • Valid −- the sample size is greater than 30
  • Questionable −- there is likely to be some nonresponse bias and, while n>30, the skewness in the distribution is concerning
  • Questionable −- While n>30, the skewness in the distribution is concerning
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