The latest U.S. census shows the population aged 25 to 40 to be 48 male and 52 female. A market research firm interested in the buying habits of young adults aged 25 to 40 instructs its interviewers to sample 300 persons, 144 of whom are to be men and 156 of whom are to be women. This is an example of a quota sample.
Indicate whether the statement is true or false
Question 2
Which of the following statements is true with respect to the t distribution?
a. The t distribution is more spread out than the standard normal distribution.
b. The t distribution is symmetrical.
c. The shape of the t distribution depends on the number of degrees of freedom.
d. All of these.
e. None of these.
Male cheetah marking territory
Female African elephant with calf, in Kenya.
An emergency medical technician positions defibrillator paddles on the chest of a supine male patien
Working-Age Fraction of the U.S. Population, 1950–2050
A graphic depiction of predisposing alleles characteristic of a threshold trait within a population,
G-banded karyotype of a normal human male