The finite population correction factor n 1 is used when a. the sample elements are dependent. b. ...

The finite population correction factor n 1 is used when
 a. the sample elements are dependent.
  b. the sample elements are independent.
  c. sample size represents less than 10 of the population.
  d. always.
  e. never.

Question 2

Which of the following estimated population proportions would require the largest size sample to estimate it with a specified degree of precision and confidence?
 a. 0.50
  b. 0.40
  c. 0.10
  d. 0.90
  e. 1.00N n

Question 3

In the absence of any information concerning the population proportion the conservative researcher should use which of the following estimates when calculating sample size?
 a. 1.00
  b. 0.20
  c. 0.50
  d. 0.80
  e. 0.00

Question 4

After the households in the previous question were surveyed, the sample proportion of households using liquid soap was determined to be 0.2 . The precision at the 95 confidence level is + or
 a. 0.028 percentage points.
  b. 0.032 percentage points.
  c. 0.040 percentage points.
  d. 0.057 percentage points.
  e. 0.141 percentage points.

Question 5

A soap manufacturer wants to know within +4 percentage points what percentage of households use liquid soaps. To be 95 confident in the estimate, how many households should be sampled? (Note: a confidence interval greater than +4 percentage points is unacceptable.)
 a. 600
  b. 625
  c. 700
  d. 750
  e. 550

Question 6

p =  n is the
 a. proportion of successes in n trials.
  b. level of precision.
  c. standard error of the proportion.
  d. unbiased estimate of the population proportion.
  e. standard error of the mean.

Question 7

The normal distribution most closely approximates the binomial when __________ and __________.
 a. the sample is small, population proportion is small
  b. the sample is large, population proportion is small
  c. the sample is large, population proportion is close to 0.5
  d. sample is greater than 5, population proportion is close to 0.9
  e. the sample is greater than 30 but less than 100, the population proportion is close to 0.1 (1 )

Question 8

When estimating a population proportion instead of a mean, in order to determine the sample size necessary you need all of the following information EXCEPT
 a. degree of confidence.
  b. estimate of the proportion.
  c. estimate of the heterogeneity of the population.
  d. specified precision.
  e. All of the above are necessary items of information.