Statistical Interpretation 2

Probability Level 2

Josh wants to find out what proportion of all students at his high school (9th to 12th grade) have read books during the school year. He conducts a survey and constructs a 95 % 95\% confidence interval from the data he collects using the z-interval method. Upon reviewing his data, Josh realizes that his sample consisted only of ninth grade students. What should Josh do to fix this issue?

Construct a t-interval instead of a z-interval Redo the survey with a more representative sample Lower the confidence level to 50 % 50\% Survey more students in addition to the original sample Nothing; the confidence interval is representative of the population

Steven Yuan by Steven Yuan , 20, USA

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