Suppose the mean checkout tab for all customers at a large supermarket equals $65.12 with a standard deviation of $21.45. Twenty-three out of 100 times when a random sample of 45 customer tabs is selected, the sample mean should exceed what value

Step-by-step explanation:

Suppose the mean checkout tab for all customers at a large supermarket equals $65.12 with a standard deviation of $21.45. Twenty-three out of 100 times when a random sample of 45 customer tabs is selected, the sample mean should exceed what value

z = (x-μ)/σ, where x is the raw score, μ is the population mean, and σ is the population standard deviation.

-2 is the right