1. Math
  2. Statistics And Probability
  3. question 13 5 points in a sample of 90 grocery...

Question: question 13 5 points in a sample of 90 grocery...

Question details

QUESTION 13 5 points In a sample of 90 grocery store customers. it is found that 63% of them were buying 15 items or fewer. Determine the upper bound of the 95% confidence interval for the proportion of customers that buy 15 items or fewer? (please express your answer AS A DECIMAL using 4 decimal places) QUESTION 14 5 points Historically, the proportion of students entering a university who finished in 4 years or less was 60%. To test whether this proportion has decreased, 118 students were examined and 50% had finished in 4 years or less. To determine whether the proportion of students who finish in 4 year or less has statistically significantly decreased (at the 5% level of signficance), what is the critical value? (please round your answer to 2 decimal places)

Solution by an expert tutor
Blurred Solution
This question has been solved
Subscribe to see this solution