Sampling error occurs when:
A) a nonstatistical sample is used.
B) the statistic computed from the sample is not equal to the parameter for the population.
C) a random sample is used rather than a convenience sample.
D) a confidence interval is used to estimate a population value rather than a point estimate.
Q. 2Suppose that a group of 10 people join a weight loss program for 3 months. Each person's weight is recorded at the beginning and at the end of the 3-month program. To test whether the weight loss program is effective, the data should be treated as:
A) independent samples using the normal distribution.
B) paired samples using the t-distribution.
C) independent samples using the t-distribution.
D) independent proportions.
Q. 3A control chart is a run chart that has two additional horizontal lines called ________.
A) production specifications
B) legal limits
C) control limits
D) process statistics
Q. 4When a construction company bids on a contract, the events will be win or lose. The closer the probability is to 0.50, the greater the uncertainty about whether the company will win or lose the bid.
Indicate whether the statement is true or false
Q. 5After developing a frequency distribution for a quantitative variable, a histogram can be developed with the horizontal axis representing the values of the variable and the vertical axis representing the frequency of occurrence in each class or group
. Indicate whether the statement is true or false
Q. 6What is the probability that the clinical trials conducted on the drug are not successful?
A) 0.108
B) 0.018
C) 0.054
D) 0.700
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