Statistical methods used to measure the relationships between two variables are referred to as
a. inferential statistics.
b. correlational statistics.
c. bivariate statistics.
d. multivariate statistics.
Which of the following measures central tendency?
a. Mode
b. Standard deviation
c. Sum of squares
d. Variance
If the lower limit of a confidence interval is 1.5 and the upper limit of a confidence interval is 5.5, we can state that
a. a score of 6 is impossible.
b. 95 percent of the scores should fall between 1.5 and 5.5.
c. the confidence level is extremely small.
d. the distribution is normal.
Descriptive statistics are more precise when the sample is larger. This is predicted by the
a. standard error.
b. central tendency measures.
c. normal distribution.
d. central limit theorem.
Joe has a score of 8 on a variable that has a mean of 10 and a standard deviation of 2 . What is Joe's standard score on the variable?
a. 12
b. -1
c. 8
d. -2
Which of the following measures dispersion?
a. Mean
b. Percentile rank
c. Sum of squares
d. Mode
If A = 5, B = 4 and C = 2, then (A, B, C) =
a. 5
b. -1
c. 40
d. 11
Descriptive statistics represent the data from a ________ whereas parameters represent the data from a __________.
a. sample; population
b. population; sample
c. normal distribution; control group
d. binomial distribution; population
A quick way to check the data once it has been entered is to
a. compare all of the data with the original questionnaires.
b. wait until a statistical analysis is completed before checking the data.
c. conduct a frequency distribution.
d. conduct a chi-square analysis.
Nominal variables, such as gender and ethnicity, are usually entered into a data analysis program as
a. letters corresponding to each level of the variable.
b. a ratio scale.
c. numbers corresponding to each level of the variable.
d. words such as male, female, black, and white.
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