STUDY.COM BUS 212-CHAPTER 13

Identify which of the following is NOT an example of descriptive statistics:

A company being 95% certain that a 10% increase in advertisement will cause a 15% increase in revenue.

Which of the following is NOT done by statistical software?

The software creating recommendations based on the results of the data.

How many teens would not pick chocolate?

61

Examples of parametric methods include: I. t-test II. z-test III. Mann-Whitney U test

I and II

Examples of non-parametric methods include: I. Wilcoxon signed-rank test II. Kruskal Wallis test III. t-test

I and II only

The Wilcoxon signed-rank test assumes: I. Normal distribution II. Symmetry III. A specific shape

II only

A company is trying to determine what products it should develop in the next 10 years. They are analyzing data from their sales, as well as the data from the leading 10 companies in the industry in order to try and find a pattern of what products could be most successful. What type of statistics is the company using?

Predictive

Which of these is NOT a parameter? I. Population mean II. Population standard deviation III. Sample mean

III

Descriptive measures of population data are called:

Parameters

Which of the following p-values indicates that the findings of the experiment are statistically significant?

.05

How many people surveyed favored football or baseball?

112

The chi-square formula cannot function if the number of observed or expected is below which of the following?

5

How many children and teens eat bananas?

87

How many of the people surveyed favored football or basketball?

90

Power, in terms of parametric and non-parametric methods, is the probability of:

Avoiding a type II error

A candy company is introducing a new brand of chocolate to the market. They have advertised heavily, investing $8,000,000 in New York, but no ads were run in Boston. After analyzing the data, they have found no statistically significant difference between their sales in New York and Boston. Why is this an example of inferential statistics?

Because it is trying to infer aspects of the relationship between two different groups.

Which of the following types of data are required in order to run a chi-square?

Categorical data

Between which of the following data does a chi-square measure the difference?

Collected and expected

You are observing a psychologist run a chi-square. You see the psychologist take his number of categories and subtract 1. Which of the following is the psychologist calculating?

Degrees of freedom

How many adults picked chocolate or vanilla?

109

Why does statistics often refer to being 95% confident and not 100%?

Because there is never enough data to state something with absolute certainty.