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Tutor profile: Marian P.

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Marian P.
Tutor for Business, Business Research, and Statistics
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Questions

Subject: Economics

TutorMe
Question:

Keep in mind the rule of 70. The population of a town is growing by 4% per year. How long will it take the population to double?

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Marian P.
Answer:

70/4 = 17.5. The population of the town will double in 17 and a half years.

Subject: Statistics

TutorMe
Question:

Two groups of high-school students are being studied. One group is regularly attending study skills workshops, and the other is not. The two groups' GPAs are compared using a paired-sample t-test with an alpha level of .05. The test returns a p-value of .002. State the two-tailed and one-tailed hypotheses and interpret the p-value.

Inactive
Marian P.
Answer:

Ho: There will be no difference between the GPAs of the group that attended the workshops and the GPAs of the group that did not attend the workshops. Ha (two-tailed): There will be a difference between the GPAs of the group that attended the workshops and the GPAs of the group that did not attend the workshops. Ha (one-tailed): The GPAs of the group that attended the workshops will be higher than the GPAs of the group that did not attend the workshop. Because the p-value is less than the alpha level, the null hypothesis can be rejected. For a two-tailed test, it can be concluded that there is a statistically significant difference in the GPAs of the group that attended the workshops and the GPAs of the group that did not. For a one-tailed test, it can be concluded that the GPAs of the group that attended the workshops are statistically significantly higher than the GPA of those that did not.

Subject: Data Science

TutorMe
Question:

State a situation in which running a multiple regression would be appropriate.

Inactive
Marian P.
Answer:

A client would like to know which aspects of his different advertisements are most effective. A multiple regression can be run using his advertisements' effectiveness, analyzing them to find out if celebrity sponsorship, certain jingles, or emotional appeals are driving consumer purchasing the most.

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