Statistics Quiz # 3

The arithmetical_____ of a set of scores is called mean.

Sum

Division

Average

None of these

Parameters that measure the center of a frequency distribution refer to_____

Measure of variation

Measure of central tendency

Measure of kurtosis

Measure of reliability

Measures of variation means the parameters that measure the tendency of scores to be _____ to the center point.

Close

Far away

At center

Both a and b

Median is the _____ score.

Average

Equally Distributed

Frequently occurred

All of these

Mode is the_____ score.

Average

Equally Distributed

Frequently occurred

All of these

Mode is the_____ score.

Average

Equally Distributed

Frequently occurred

All of these

All are true about outlier except_____

Deviant scores that have been legitimately gathered

They are uncommon scores

They range far from the central tendency of the data set

They range close to the central tendency of the data set

Range is the _____ score.

Lowest

Highest

Average

Both a and b

If the means of samples from the same population are formed into a frequency distribution, then the result is a _____

Probability distribution

Sample distribution

Uniform distribution

None of these

Standard deviation is a parameter of variability of data about the_____

Mean score

Median score

Mode score

Range score

Standard error of the mean is the _____ of a sampling distribution of means.

Variance

Standard deviation

Standard score

None of these

Unbiased estimator is a sample parameter that has an overall tendency to either overestimate or underestimate the population value.

True

False

Uninterpretable results is a condition when a test’s outcome is invalid because the test has not been given according to its correct instructions or directions.

True

False

Variance is the_____ of standard deviation.

Sum

Square

Sum of square

Square of sum

Standard score is a type of score whose _____ are known or given.

Mean

Standard deviation

Range

Both a and b

T score is a type of standard score with a mean of _____

10

25

50

100

T score is a type of standard score with a standard deviation of _____

10

25

50

100

A distribution of scores according to frequency that is perfectly normally distributed based on z scores is known as_____

Standard distribution

Z distribution

Both a and b

None

The standard deviation of z score is _____

0.10

1.00

10.0

100

To consider findings significant, the probability of alpha must be _____

0.5

0.05

Less than 0.05

Greater than 0.05

Most frequently, what the experimenter thinks may be true or wishes to be true before beginning an experiment is known as_____

Alternative hypothesis

Research hypothesis

Conformational hypothesis

Both a and b

Beta refers to the probability of_____

Type I error

Type II error

Both

None of these

In a controlled experiment , the parameter of statistical interest is the difference between the two groups’ means on some _____ variable as a function of the independent variable.

Confounding

Descriptive

Dependent

Continuous

Demand characteristics are _____ hints and cues that guide participants to act in accordance with the experimenter’s wishes or expectations.

Subtle

Unconscious

Assured

Both a and b

Directional alternative hypothesis is also called as_____

One-tailed test of significance

Two-tailed test of significance

Z test

T Test

Insignificant is often erroneously used instead of the correct statistical term not significant or nonsignificant.

True

False

In nondirectional hypothesis the _____ hypothesis will be rejected if two groups’ means differ in either direction.

Null

Alternative

Both

None

Findings are considered statistically nonsignificant or not significant if the probability of being wrong is_____

Equal to 0.05

Less than 0.05

More than 0.05

All of these

All are correct about null hypothesis except_____

The starting point in scientific research

Assumed there is no effect of the treatment

Assumed that there is no relationship between two variables

Assumed to be true before the start of experiment

Null hypothesis significance testing is a statistical method for testing whether or not _____ variable has an effect on the dependent variable.

Confounding

Response

Continuous

Independent