QUESTION 6 The items or individuals of the population are arranged in a file dra

Question

QUESTION 6

The items or individuals of the population are arranged in a file drawer alphabetically by date received. A random starting point is selected and then every kth member of the population is selected for the sample. This method is called systematic random sampling.

True

False

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QUESTION 7

A statewide sample survey is to be made. First, the state is subdivided into counties. Seven Counties are selected at random and further sampling is concentrated on those seven counties. What type of sampling is this?

Non-Proportional

Cluster

Stratified

Simple Random

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QUESTION 8

A sample of union members was selected and their opinions regarding the proposed management union contract were recorded with 1,600 out of the 2,000 members in favor of it. Using the 0.95 degree of confidence the interval estimate of the population proportion was computed to be 0.78 and 0.82. This indicates that about 68 out of 100 similarly constructed intervals would include the population proportion

True

False

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QUESTION 9

When deciding to collect sample information rather than collecting information from the population, the amount of time required to collect the information is unimportant.

True

False

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QUESTION 10

A member of Congress wants to determine her popularity in a certain part of the state. She indicates that the proportion of voters who will vote for her must be estimated within plus or minus 2 percent of the population proportion. Further, the 0.95 degree of confidence is to be used. In past elections, the representative received 40% of the popular vote in that area of the state. She doubt whether it has changed much. How many registered voters should be sampled?

2000

5200

864

2305

Non-Proportional

Cluster

Stratified

Simple Random

Explanation / Answer

Question 6) True ( Since In Systematic sampling sample members from a larger population are selected according to a random starting point and a fixed, periodic interval.

Question 7) Stratified ( Since in stratified sampling the population is first divided into homogenous grouos i.e. strata and than random samples are selected randomly from this stratum.)

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