Question

Assume that all​ grade-point averages are to be standardized on a scale between 0 and

55.

How many​ grade-point averages must be obtained so that the sample mean is within

0.0150.015

of the population​ mean? Assume that a

9898​%

confidence level is desired. If using the range rule of​ thumb,

sigmaσ

can be estimated as

StartFraction range Over 4 EndFractionrange4equals=StartFraction 5 minus 0 Over 4 EndFraction5−04equals=1.251.25.

Does the sample size seem​ practical?

The required sample size is

nothing.

​(Round up to the nearest whole number as​ needed.)

Answer 1

Margin of emo E = 0.015 C = 981. Ca=0.02 20.99 = 2.33 o = .25 Sample size n = Zorgo *o] 2.33 * 1.25 0.015 .5 37700.69 37701 The required Complee size ir 37701