Name: Multiple Choice 1. (2 points) A sampling method that divides N items into

Question

Name: Multiple Choice 1. (2 points) A sampling method that divides N items into naturally occurring groups, such as zip codes, and then randomly samples from one or more of the groups, is called a. Simple Random Sample b. Systematic Sample c. Stratified Sample d. Cluster Sample 2. (2 points) Rejecting the null hypothesis, Ho, when there is insufficient reason to reject it is known at a: a. Type II error b. Critical value error c. Wrong p-value error d. Type I error 3. (2 points) A sampling method in which every item has the same chance of selection, and items are selected randomly, is called a. Cluster Sample b. Simple Random Sample c. matic Sample Sample d. Stratified Sample

Explanation / Answer

1. A stratified sampling design refers to division of population into several naturally occurring subgroups or strata, and then random samples are drawn from each stratum. Ans>c

2. Incorrectly rejecting a true null hypothesis refer to Type I error. Ans>d

3. A simple random sample of size n is a sample in which each set of n elements in a population has an equal chance of selection. Ans>b

4. Alpha is the probability of rejecting a true null hypothesis. Ans>c

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