Fall 2024 Midterm

Find the value of 1-tailed t-test with an alpha of .05, and 2 degrees of freedom.

Hypothesis testing tells us which of the following?

Which of the following statements are always true?

The mean always has a value equal to one of the raw scores in a data set.

In a probability experiment, an event consists of _____.

Which of the following is NOT true of the normal distribution?

A decrease in Type II error leads to

Cohen's d - .20 indicates a small effect size

Which set of statistics would result in a higher percentile for an exam score of 87?

Under null hypothesis significance testing, when a test statistic is deemed statistically significant, it indicates that

One-way ANOVA is also referred to as a between-subjects ANOVA

What are the df within groups for a one-way within-subjects ANOVA with n = 12 participants observed in 3 groups?

The sample of randomly selected students consists of mostly women. This is an example of _____.

Name the test you would run in determining whether 15 clients reported increase in life satisfaction from pre to post

As a confidence level increases, margin of error increases.

A normal distribution has a mean equal to 3.4. What is the probability of a score above the mean?

A t-test is used to compare the means of 2 or more groups.

Which z-score will have the largest area of the normal curve to the right of it?

In order to compare an individual score to a distribution, we need to convert which of the following?

Power = 1- beta

A researcher records the number of times a person repeats a compulsive behavior. What type of data was measured?

Researchers interested in establishing the past year prevalence of MDD among U.S. high school students would likely use:

In a distribution that is positively skewed, which measure of central tendency is the largest?

A statistical decision to fail to reject the null hypothesis can be interpreted as ____.

A normal distribution has a mean of 10 and a standard deviation of 2. What is the z-score for X = 13?

What does the symbol, P(x), represent?

If a researcher conducted a study in which statistical significance was set to .05 and statistical power = 0.85.

The standard error of the mean ____.

Interval scale has a true zero

You have determined that for your research, beta = .85. What does this suggest?

____ has implications for internal validity and ____ has implication for external validity.

A positive skew may have a tail that indicates extreme scores _______ the center of the distribution.

Final grades in a class with grade inflation would result in a distribution with a _____.

If the smallest score in the distribution is 10 and the largest is 32, the what is the range for these data?