Questions from Statistics Principles

Q: Explain why chi-square goodness-of-fit tests are

Explain why chi-square goodness-of-fit tests are always right tailed.

Q: If the expected count of a category is less than 1,

If the expected count of a category is less than 1, what can be done to the categories so that a goodness-of-fit test can still be performed?

Q: A “nine-ender” is an individual whose age ends

A “nine-ender” is an individual whose age ends in 9 (as in 29, 39, 49 years of age). Some studies have suggested that nine-enders tend to participate in certain activities at a higher rate than those...

Q: True or False: The shape of the chi-square distribution

True or False: The shape of the chi-square distribution depends on the degrees of freedom.

Q: A_______ test is an inferential procedure used to determine whether a

A_______ test is an inferential procedure used to determine whether a frequency distribution follows a specific distribution.

Q: The following table contains the number of successes and failures for three

The following table contains the number of successes and failures for three categories of a variable. Test whether the proportions are equal for each category at the  = 0.01 level of significance.

Q: People often respond to survey questions without any knowledge of the subject

People often respond to survey questions without any knowledge of the subject matter. A common example of this is the discussion on banning dihydrogen monoxide. The Centers for Disease Control (CDC) r...

Q: The following table contains the number of successes and failures for three

The following table contains the number of successes and failures for three categories of a variable. Test whether the proportions are equal for each category at the  = 0.01 level of significance.

Q: A sociologist wants to discover whether the sexual activity of females between

A sociologist wants to discover whether the sexual activity of females between the ages of 15 and 19 years and family structure are associated. She randomly selects 380 females between the ages of 15...

Q: An obstetrician wants to learn whether the amount of prenatal care and

An obstetrician wants to learn whether the amount of prenatal care and the wantedness of the pregnancy are associated. He randomly selects 939 women who had recently given birth and asks them to discl...