Chapter 9 vocab review

A random sample of 100 Woodrow students found that 53 of them were in possession of a pencil. What is the p-hat for this sample?

• 0.53

• 0.5

• 53

• 153

Tags

CCSS.HSS.IC.B.4

Which z-value is used for a 95% confidence interval?

• 1.65
• 1.96
• 2.58
• 2.33

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

The 90% interval for a statistics test was given by 72 +- 7. What is the lower bound for the interval?

• 7
• 72
• 65
• 79

Tags

CCSS.HSS.IC.B.4

In a crash test of 15 troopers, collision repair costs are found to have a distribution that is approximately normal, with a mean of $1800 and a standard deviation of $950. Construct a 99% confidence interval for the repair cost. 

• (1070, 2530)
• (1273, 2326)
• (1799, 1801)
• None of these.

Tags

CCSS.HSS.IC.A.1

CCSS.HSS.IC.B.4

CCSS.HSS.ID.A.4

Thirty randomly selected students took the calculus final. If the sample mean was 92 and the standard deviation was 9.4, construct a 99 percent confidence interval for the mean score of all students.

• 89.08 < μ < 94.92 
• 87.27 < μ < 96.73
• 87.29 < μ < 96.71 
• 87.77 < μ < 96.23

Tags

CCSS.HSS.IC.B.4

If 827 represents "no" voters out of 2584, construct a 95% confidence interval for the "no" group.

• [.662,.698]

• [.298,.342]

• [.302,.338]

• [.288,.352]

Tags

CCSS.HSS.IC.B.4

In a survey of 2480 golfers, 15% said they were left-handed.  The survey's margin of error was 3%.  Construct a confidence interval for the proportion of left-handed golfers.

• (0.18 to 0.21)
• (0.12 to 0.18)
• (0.12 to 0.15)
• (0.11 to .19)

Tags

CCSS.HSS.IC.B.4

Which of the following is the definition of a "point estimate?" Choose the best answer for the definition.

• The average of a population.

• The average of a sample.

• The midpoint of a confidence interval.

• The confidence interval.

Tags

CCSS.HSS.IC.B.4

The amount added and subtracted to the statistic.

• Margin of Error

• Point Estimator

• Statistic

• Population

Tags

CCSS.HSS.IC.B.4