For any continuous random variable x, P(x = 5) = 1 is always true.
Indicate whether the statement is true or false
Q. 2Two samples are said to be independent if they are selected at different points in time.
Indicate whether the statement is true or false
Q. 3When trying to control the risk of error and two tests are equal candidates, we should select the one with
a. no error.
b. lowest efficiency.
c. greatest power.
d. most calculations.
Q. 4Any continuous random variable cannot take on negative values.
Indicate whether the statement is true or false
Q. 5Increasing the confidence level for a confidence interval estimate for the difference between two population means, with all other things held constant, will result in a wider confidence interval estimate.
Indicate whether the statement is true or false
Q. 6Which one of the following statements is incorrect about the comparison of parametric and nonparametric statistical methods?
a. The efficiency of a nonparametric test is the ratio of the sample size of the best parametric test to the sample size of the nonparametric test.
b. If a set of sample data is such that it can be analyzed by using either a parametric or a nonparametric method, the parametric method is the better choice.
c. There are nonparametric methods for which there is no parametric counterpart.
d. Some nonparametric methods use a z-test statistic. When this occurs, the sample data is from a normal population.
Q. 7The mean, median, and standard deviation of a normally distributed random variable are all at the same position on the horizontal axis since the distribution is symmetric.
Indicate whether the statement is true or false
Quick Reply
