An Analysis of Variance yielded the following results: F-Value: 12.5 P-Value: .0000

Using a significance level of .001, interpret the results.

The data provides strong evidence that the time needed to write emails is related to the condition indicating that not all of the means are the same: one or more pairs have a statistically significant difference.

The data provides strong evidence that the time needed to write emails is related to the condition in the following way: the course-guided group significantly outperformed the self-paced group and the self-paced group in turn out-performed the control group.

The data do not provide sufficient evidence that the time needed to write emails is related to the condition indicating that all of the means are the same: none have a statistically significant difference.

Question 7

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A study was conducted on twins at age 5 years old. One twin was assigned to be homeschooled and another twin was assigned to attend public school for the next 5 years. At the end of the 5 years, they conducted a battery of academic tests and scored the toddlers for overall academic achievement with a total of 100 points, higher scores indicating greater academic achievement.

What hypothesis testing technique should the researcher use to analyze the data?

ANOVA

Chi-square

Two Sample T-Test

Paired T-Test

Question 8

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In a study on creativity, researchers randomly assigned participants to one of three conditions and asked them to draw an alien:

• Control Group: no examples offered
• Visual: Picture provided as an example of what an alien picture could look like
• Linguistic: Linguistic description provided as an example of what an alien picture could look like

The pictures were rated by artists on a scale of 1-10 for creativity (higher scores indicating higher levels of creativity).

What hypothesis testing technique should the researcher use to analyze the data?

ANOVA

Paired T-Test

Two-sample t-test

Chi-square

Question 9

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A researcher wants to test how much time stay at home dads do chores and housework compared to stay at home moms in one week. The study randomly selects 30 men and 30 women who are stay at home parents with one child and analyze their time spent doing housework and childcare in a week to find the average number of hours per week for each group.

Which of the following should the researcher use to determine whether there is a difference in mean number of hours spent working as stay at home parents between men and women?

two-sample t-test

z-test for the population mean

paired t-test

ANOVA