Author Question: A new apparatus has been devised to replace the needle in administering vaccines. The apparatus, ... (Read 74 times)

CORALGRILL2014 · **on:** Feb 14, 2020

Question 1

An educational testing service designed an achievement test so that the range in student scores would be greater than 420 points. To determine whether the objective was achieved, the testing service gave the test to a random sample of 30 students and found that the sample mean and variance were 759 and 1943, respectively. Conduct the test for

using

Assume the range is 6σ.

Question 2

A new apparatus has been devised to replace the needle in administering vaccines. The apparatus, which is connected to a large supply of vaccine, can be set to inject different amounts of the serum, but the variance in the amount of serum injected to a given person must not be greater than .05 to ensure proper inoculation. A random sample of 31 injections resulted in a variance of .103. Specify the rejection region for the test. Use

SeanoH09 · **Reply #1 on:** Feb 14, 2020

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