Exam 15: Frequency Distribution, cross-Tabulation, and Hypothesis Testing

A cross-tabulation is the merging of the frequency distribution of two or more variables in a single table to help us to understand how one variable relates to another variable.

The F static is computed as the ratio of two sample variances.

The ________ is a univariate hypothesis test using the t distribution,which is used when the standard deviation is unknown and the sample size is small.

The variance can never be negative.

For the parametric case involving the means of paired samples,the null and alternative hypotheses are ________.

The probability of Type II error (α)is also called the level of significance.

When variables are perfectly associated,the phi coefficient assumes the value of 1.

When the difference in the location of two populations is to be compared based on observations from two independent samples,and the variable is measured on an ordinal scale,the ________ can be used.

For a given level of α,increasing the sample size will decrease β,thereby increasing the power of the test.

Which of the research questions/hypotheses below is best answered using hypothesis testing?

The ________ is the difference between the 75th and 25th percentile.

Frequency data may be used to construct a histogram,or a vertical bar chart.

If the samples used in the Mann-Whitney U test are from the same population,the distribution of scores from the two groups in the rank list should be ________.

The degrees of freedom for the t statistic to test hypotheses about paired samples are ________.

The ________ is the ratio of the standard deviation to the mean,expressed as a percentage,and it is a unitless measure of relative variability.

The ________ is a statistic that assumes that the variable has a symmetric bell-shaped distribution and the mean is known (or assumed to be known)and the population variance is estimated from the sample.

Which program or function listed below is not useful for conducting nonparametric tests?

The median is an appropriate measure of central tendency for ________ data.

Which test is not an independent samples test?

Which of the following tests is not a non-parametric one-sample test?