Descriptive and inferential statistics practice well answered to pass

Descriptive and inferential statistics
practice

which of the following statements about a normal distribution is not true?

A. A normal distribution is represented by a bell-shaped curve.

B.

A normal distribution has the same value for the mean, median, and mode.

C.

A normal distribution displays the highest data scores in the middle of the distribution.

D.

A normal distribution demonstrates how data scores rise and fall within a sample. - correct answer
✔✔C. A normal distribution displays the highest data scores in the middle of the distribution.



If the observed test value of a hypothesis test is outside of the established critical value(s), a researcher
would __________.

A. claim significant support for the hypothesis

B.claim no significant support for the hypothesis

C. restate the hypothesis more clearly

D. repeat the experiment until support is found - correct answer ✔✔A. claim significant support for the
hypothesis



Explain why researchers cannot claim causation when examining the relationship between variables? -
correct answer ✔✔Researchers cannot claim that one variable causes another because they are not
entirely sure which variable impacts the other when examining the relationship between them.
Researchers also do not know for sure how many unknown or untested variables influence another
variable. Therefore, claiming that one variable causes another would be inaccurate.



A negative correlation between two variables indicates that one variable score increases as another
variable score decreases.

True or false - correct answer ✔✔True