A researcher has a first-grade readiness test that is administered to kindergarten students and scored at the interval level. The population mean is 60, with a standard deviation of 10. He has administered it, individually, to a random sample of 58 kindergarten students in a city, M = 66, and wants to use a single-sample z test, two-tailed with α = .05, in order to see whether first-grade readiness in this city differs from the national level. Check the assumptions and decide if it is OK for him to proceed with the single-sample z test.

MATLAB: An Introduction with Applications
6th Edition
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Author:Amos Gilat
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Chapter1: Starting With Matlab
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A researcher has a first-grade readiness test that is administered to

kindergarten students and scored at the interval level. The population

mean is 60, with a standard deviation of 10. He has administered it,

individually, to a random sample of 58 kindergarten students in a

city, M = 66, and wants to use a single-sample z test, two-tailed with

α = .05, in order to see whether first-grade readiness in this city

differs from the national level. Check the assumptions and decide if

it is OK for him to proceed with the single-sample z test.

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