Question

Asked Jun 5, 2019

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Number 1 Please, Explain shortcut with TI84 if applicable

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 H_{0}: µ ≥ 20 vs H_{1}: 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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