Executives at Sale Mart Supermarket claim that a typical family of four spends $200 weekly on routine, non-holiday, grocery purchases.According to published industry standards, the population standard deviation is $25.

Stella, a stats intern at the chain's corporate headquarters, wonders if that original claim by the executives seems too low.As a project, she collects from store sales receipts a simple random sample (SRS) of size 64.The sample mean for the weekly grocery purchases for a family of four is $205.She is defining as rare, or unusually high, any sample mean that is in the top 5% of all possible sample means; hence, she is testing at the5%level of significance.What conclusion should Stella draw, based on the available evidence?

FALSEorTRUE:This is an example of statistical inference,namely hypothesis testing.

1. True
2. False

Stella, a stats intern at the chain's corporate headquarters, wonders if that original claim by the executives seems too low.As a project, she collects from store sales receipts a simple random sample (SRS) of size 64.The sample mean for the weekly grocery purchases for a family of four is $205.She is defining as rare, or unusually high, any sample mean that is in the top 5% of all possible sample means; hence, she is testing at the5%level of significance.What conclusion should Stella draw, based on the available evidence?

FALSEorTRUE:This is an example of a one-tail right-tailhypothesis test.

True

False

Stella, a stats intern at the chain's corporate headquarters, wonders if that original claim by the executives seems too low.As a project, she collects from store sales receipts a simple random sample (SRS) of size 64.The sample mean for the weekly grocery purchases for a family of four is $205.She is defining as rare, or unusually high, any sample mean that is in the top 5% of all possible sample means; hence, she is testing at the5%level of significance.What conclusion should Stella draw, based on the available evidence?

FALSEorTRUE:The appropriate probability distribution and test statistic for this inference is thezor standard normal primarily because the population standard deviation is known and secondarily becauseit involves a large sample.

True

False

ales receipts a simple random sample (SRS) of size 64.The sample mean for the weekly grocery purchases for a family of four is $205.She is defining as rare, or unusually high, any sample mean that is in the top 5% of all possible sample means; hence, she is testing at the5%level of significance.What conclusion should Stella draw, based on the available evidence?

FALSEorTRUE:The appropriate test statistic is calculated as follows:

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