A newspaper is trying to decide which comics to carry on a daily basis, which comics to carry only on Sunday, and which comics to discontinue. The editor invites the readers to vote for their preferences by clipping a ballot from the editorial page and mailing it in. This is an example of a judgment sample.
Indicate whether the statement is true or false
Q. 2The t distribution table in your test shows:
a. the area under a specified curve, defined by a given number of degrees of freedom , that lies to the left of a specified value of t
b. the area under a specified curve, defined by a given number of degrees of freedom, that lies to the right of a specified value of t
c. specified values of t for the area under a specified curve, defined by a given number of degrees of freedom
d. the heights of a specified curve, defined by a given number of degrees of freedom, at various specified values of t
e. specified values of t for different heights of a specified curve, defined by a given number of degrees of freedom
Q. 3Nonrandom samples can be described and also be used for making inferences.
Indicate whether the statement is true or false
Q. 4Which of the following correctly describes Student's t distribution?
a. It is a sampling distribution for a random variable, t, derived from a normally distributed population.
b. It is single-peaked above the random variable's mean, median, and mode of 1.
c. It is always skewed to the right.
d. None of these.
e. All of these.
Q. 5A cluster sample is a simple random sample of clusters from the available clusters in the population.
Indicate whether the statement is true or false
Q. 6Which of the following statements is false?
a. The t distribution is symmetric about zero.
b. The t distribution is more spread out than the standard normal distribution.
c. As the degrees of freedom get smaller, the t distribution's dispersion gets smaller.
d. The t distribution is mound-shaped.
e. The t distribution is symmetric about zero and the t distribution is more spread out than the standard normal distribution.
Q. 7There are four ways of selecting a distinct, unordered sample of size n = 2 without replacement from a population of size N = 4.
Indicate whether the statement is true or false
Q. 8The shape of the Student t-distribution depends on:
a. the population variance
b. the number of its degrees of freedom
c. the population mean
d. the number of its degrees of freedom and the population mean
e. all of these
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