REVIEW DRAMA 4 MATHEMATICS 3

A sample of 30 women finds the mean height to be 62.3 in and the standard deviation to be 1.5 in. Find the margin of error of women's heights with a 95% CL.

• 1.699
• 0.56
• 0.537
• 19.325

Tags

CCSS.HSS.IC.B.4

Which of the following changes to a study would result in a narrower confidence interval?

• increasing the confidence level, increasing the sample size
• decreasing the confidence level, decreasing the sample size
• increasing the confidence level, decreasing the sample size
• decreasing the confidence level, increasing the sample size.

Tags

CCSS.HSS.IC.B.4

On a recent test, one class of 26 students had a mean score of 78%, while another class of 32 students had a mean score of 86%. What is the overall mean of the two classes combined?

• 82

• 82.4

• 81

• 83

Tags

CCSS.7.EE.B.3

CCSS.7.NS.A.1

CCSS.7.NS.A.3

CCSS.7.SP.B.4

Find the median of these numbers:
2, 3, 4, 5, 5, 7

• 4
• 5
• 4.5
• 6

Tags

CCSS.7.EE.B.3

33, 25, 42, 25, 31, 37, 46, 29, 38
What is the interquartile range of the data?

• 8
• 9
• 13
• 21

Tags

CCSS.HSA-SSE.A.1A

The masses of six children are 34.5 kilograms, 42.6 kilograms, 39.8 kilograms, 40.1 kilograms, 53.4 kilograms, and 33.8 kilograms. Find the mean mass.

• 40.7 kg
• 40
• 41
• 50

Tags

CCSS.6.SP.A.3

CCSS.6.NS.B.3

CCSS.6.SP.B.5

Which of the following is a measure of variability?

• mean
• median
• mode
• standard deviation

Tags

CCSS.HSS.ID.A.2

CCSS.HSS.ID.A.4

If the standard deviation of a data set is 4, what is the variance?

• 2
• 16
• 4

Tags

CCSS.6.SP.A.3

In a population of five university students with GPAs of 2.5, 2.3, 1.7, 1.4, and 1.1, a sample of three students are considered. What would be the standard deviation of the resulting sampling distribution?

• 0.53

• 0.41

• 0.35

• 0.22

Tags

CCSS.HSS.IC.A.1

CCSS.HSS.ID.A.2

Between what two standard deviations of a normal distribution contain 68% of the data?

• one below and one above
• two below and two above
• two below and zero
• zero and two above

Tags

CCSS.HSS.ID.A.4