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18)Consider the population of all UNCG students. The population distribution of GPA is the distribution of _____.
18)Consider the population of all UNCG students. The population distribution of GPA is the distribution of _____.
A)the population mean of GPA
B)the sample mean of GPA in a sample of at least 30 UNCG students
C)a randomly chosen UNCG student
D)none of the above
26)What happens as the sample size increases?
A)The standard deviation of the population decreases.
B)The population mean increases.
C)The standard error of the mean decreases.
D)The standard error of the mean increases.
14)A population consists of 3 numbers: 2, 10 and 6. You randomly select a sample of 2 observations without replacement and calculate the sample mean. The probability that the sample mean is less than 7 is _____.
A)0
B)1
C)2/3
D)1/3
12)Which of the following is true for a point estimate?
A)A sample statistic is a point estimate of a population parameter.
B)A point estimate is never equal to a population parameter.
C)A point estimate has less sampling error than a population parameter.
D)The probability distribution of a point estimate is the population distribution.
