# VECUnit 3 ExamPractice ProblemsChapters 9 & 14Chapter 91Consider the following hypothesis test:Ho: μ>20H1: H

Question
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Number 1 Please, Explain shortcut with TI84 if applicable

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Step 1

a. Computation of test statistic value:

Sample size is greater than 30 and the population standard deviation is given. Thus, in order to test H0: µ ≥ 20 vs H1: µ < 20, the appropriate test is one sample z test.

The formula for one sample z test is given below.

Step 2

Calculation:

Here, x = 19.4, µ = 20, σ = 2, and n is 50. By substituting these values in z formula, the test statistic value is |z| = 2.1213.

Step 3

b. Computation of p-value:

The EXCEL formula to find the p-value for one-tailed z-test is “=1-NORM.S.DIST(...

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