A survey of 350350 students is selected randomly on a large university campus. They are asked if they use a laptop in class to take notes. Suppose that based on the survey, 140140 of the 350350 students responded "yes." a) What is the value of the sample proportion ModifyingAbove p with caretp? b) What is the standard error of the sample proportion? c) Construct an approximate 9595% confidence interval for the true proportion p by taking plus or minus 2 SEs±2 SEs from the sample proportion.
Added by Sandra W.
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\[ \hat{p} = \frac{\text{number of "yes" responses}}{\text{total number of students}} = \frac{140}{350} = 0.4 \] --- Show more…
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