Use this information for the next four questions: Researchers wanted to know abo

Question

Use this information for the next four questions: Researchers wanted to know about a standardized test that was used across the country. To get an estimate of the answer, they collected data from two classrooms of students who completed the test. Scores from Classroom A: 8, 6, 9, 9, 8, 7, 8, 9, 10, 8, 10, 5, 4, 10, 9, 9 Scores from Classroom B: 9, 8, 7, 8, 9, 10, 9, 10, 7, 8, 10, 9, 9, 4, 6, 3

The set of all scores on the standardized test across the country is:

Select one:

a. a statistic

b. a parameter

c. the sample

d. the population

When all the scores for the two classrooms are added and divided by the number of observations, the resulting value is a:

Select one:

a. a statistic

b. a parameter

c. the sample

d. the population

What is the mean score in Group A?

Select one:

a. 8.4375

b. 8.3125

c. 8.0625

d. 8.375

e. 8.4375 / sqrt(n)

Load data for Group B into an R object called B, then run this command:

barplot(table(B))

What does the bar on the right represent?

Select one:

a. Nine students received a score of 5 on the quiz.

b. One student received a score of 6 on the quiz.

c. Three students received a score of 7 on the quiz.

d. Four students received a score of 9 on the quiz.

e. Three students received a score of 10 on the quiz.

Explanation / Answer

1. The set of all scores on the standardized test across the country is

c. the sample

2. When all the scores for the two classrooms are added and divided by the number of observations, the resulting value is a:

a. a statistic

3. What is the mean score in Group A?

c. 8.0625

4.

Load data for Group B into an R object called B, then run this command:,barplot(table(B)),What does the bar on the right represent?

e. Three students received a score of 10 on the quiz.

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