STT 200 EXAM QUESTIONS AND
ANSWERS LATEST UPDATE 2026/2027
For a randomly selected sample of n = 36 mens heights, it is reported that the standard error of
the mean is .5 inches. Which is false? - Answer- In about 95% of a ll samples of n = 36 mens
heights, the sample mean will be within .5 inches of the population mean.
Which of the following statements best describes the relationship between a parameter
and a statistic. - Answer- A statistic is used to estimate a parameter.
-fixed # dont know
- stat random sample will change
Which one of the following statements is false? - Answer- The standard error measures
the variability of a population parameter.
For which of the following situations would the Rule for Sample Proportions not apply? -
Answer- A random sample of 100 is taken from a population in which the proportion with the
trait of interest is 0.98.
-smaller then 10
The mean of the sampling distribution for a sample proportion depends on the value of -
Answer- the true population but not the sample size
Suppose that the mean of the sampling distribution for the difference in two sample proportions
is 0. This tells us that - Answer- the two population proportions are equal to each other
- x1-x2 ~N(M1-M2, sqrt(mean1/n1 , mean2/n2)
For which of the following situations would the Rule for Sample Means not apply? -
Answer- A random sample of size 20 is drawn from a skewed population
-x>30
Which one of the following statements is false? - Answer- The sampling distribution of
any statistic becomes approximately normal for large sample sizes.
1/3
ANSWERS LATEST UPDATE 2026/2027
For a randomly selected sample of n = 36 mens heights, it is reported that the standard error of
the mean is .5 inches. Which is false? - Answer- In about 95% of a ll samples of n = 36 mens
heights, the sample mean will be within .5 inches of the population mean.
Which of the following statements best describes the relationship between a parameter
and a statistic. - Answer- A statistic is used to estimate a parameter.
-fixed # dont know
- stat random sample will change
Which one of the following statements is false? - Answer- The standard error measures
the variability of a population parameter.
For which of the following situations would the Rule for Sample Proportions not apply? -
Answer- A random sample of 100 is taken from a population in which the proportion with the
trait of interest is 0.98.
-smaller then 10
The mean of the sampling distribution for a sample proportion depends on the value of -
Answer- the true population but not the sample size
Suppose that the mean of the sampling distribution for the difference in two sample proportions
is 0. This tells us that - Answer- the two population proportions are equal to each other
- x1-x2 ~N(M1-M2, sqrt(mean1/n1 , mean2/n2)
For which of the following situations would the Rule for Sample Means not apply? -
Answer- A random sample of size 20 is drawn from a skewed population
-x>30
Which one of the following statements is false? - Answer- The sampling distribution of
any statistic becomes approximately normal for large sample sizes.
1/3
