QNT/351 Week 5 My Stats Lab Answers

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1. Which hypothesis, the null or the alternave, is the status-quo hypothesis?

Choose the correct answer below

A. null hypothesis

B. alternave hypothesis

2. What is the level of signicance of a test of hypothesis?

Choose the correct answer below

A. The level of signicance, β, is the probability of comming a Type II error, rejecng the null

hypothesis when it is, in fact, true

B. The level of signicance, α, is the probability of comming a Type II error, rejecng the null

hypothesis when it is, in fact, true

C. The level of signicance, α, is the probability of commi#ng a Type I error, rejecng the null

hypothesis when it is, in fact, true

D. The level of signicance, β, is the probability of comming a Type II error, not rejecng the

null hypothesis when it is, in fact, false

E. The level of signicance, β, is the probability of comming a Type I error, rejecng the null

hypothesis when it is, in fact, true

F. The level of signicance, α, is the probability of comming a Type I error, not rejecng the

null hypothesis when it is, in fact, false

3. For each of the following rejecon regions, sketch the sampling distribuon for z and

indicate the locaon of the rejecon region, and determine the probability that a Type I error

will be made.

a. z < - 1.645 b. z > 2.575 c. z < - 1.28 or z > 1.28 d. z < - 2.33