An online retailer claims the proportion of on-time deliveries is 85%.        To test this claim, a random sample of deliveries are monitored and checked for on-time delivery status. Assume that the test statistic for this hypothesis test is 1.99. Since this is a two tailed hypothesis test, assume that the critical values for this hypothesis test are −1.96 and 1.96. Come to a decision for the hypothesis test and interpret your results with respect to the original claim. Select the correct answer below: Reject the null hypothesis.  There is enough evidence to reject the claim that the proportion of on-time deliveries is 85%. Fail to reject the null hypothesis. There is not enough evidence to reject the claim that the proportion of on-time deliveries is 85%.

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Estimation

A new framework of data analysis where the new statistical methods are used for interpreting the results and analyzing the data is known as estimation in statistics.