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1. The proportion of callers that hang up before being helped in a support center is...

1. The proportion of callers that hang up before being helped in a support center is 0.23. The company hopes that a new menu system will lower the hang-up proportion. 1000 callers were randomly selected into the new menu system. 202 of of these 1000 callers hung up before getting helped. Is the hang-up proportion for the new menu system less than 0.23?

(a) What is the null hypothesis and what is the alternative hypothesis?

(b) What is the value of the test statistic? Round your test statistic to 2 digits after the decimal point. (To get an answer good to 2 digits, compute the standard error to 5 digits.)

(c) What is the p-value of the test ? Round your p-value to 3 digits after the decimal point.

(d) Using the p-value method , do we reject or not reject H0 at the .05 level of significance? Reject or Not Reject

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