Colin is a student in a consumer mathematics class creating a report on the annual interest rates of savings accounts. He randomly selects 25 brick-and-mortar banks and 25 online banks and then records the annual interest rate for each financial institution. The results of the samples are provided in the accompanying data set. Colin found an interest rate of 2.15% from a brick-and-mortar bank and an online bank. For which type of bank is this interest rate a more unusual result, the brick-and-mortar bank or the online bank? Brick-and-mortar z -score: ? Online bank z -score: ? Use Excel to calculate the z-scores for an interest rate of 2.15% for each type of bank. Round to two decimal places.
Colin is a student in a consumer mathematics class creating a report on the annual interest rates of savings accounts. He randomly selects 25 brick-and-mortar banks and 25 online banks and then records the annual interest rate for each financial institution. The results of the samples are provided in the accompanying data set. Colin found an interest rate of 2.15% from a brick-and-mortar bank and an online bank.
For which type of bank is this interest rate a more unusual result, the brick-and-mortar bank or the online bank?
Brick-and-mortar z -score: ?
Online bank z -score: ?
Use Excel to calculate the z-scores for an interest rate of 2.15% for each type of bank. Round to two decimal places.
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