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Stats 6.1 / 6.2 Review (Confidence Intervals)

Authored by Andrew Benton

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12th Grade

CCSS covered

Used 5+ times

Stats 6.1 / 6.2 Review (Confidence Intervals)
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17 questions

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1.

MULTIPLE CHOICE QUESTION

15 mins • 1 pt

Find the critical value Zc that corresponds to a 98% confidence level

2.33

1.645

1.96

2.575

Tags

CCSS.HSS.ID.A.4

2.

MULTIPLE CHOICE QUESTION

15 mins • 1 pt

Find the margin of error for the given values of c, σ, and n.

c = 0.90, σ = 10.2, n = 75

1.06

1.94

0.22

1.18

Tags

CCSS.HSS.IC.B.4

3.

MULTIPLE CHOICE QUESTION

15 mins • 1 pt

In a recent study of 42 eighth graders, the mean number of hours per week that they watched television was

19.6. Assume the population standard deviation is 5.8 hours. Find the 98% confidence interval for the

population mean.

(14.1, 23.2)

(18.3, 20.9)

(17.5, 21.7)

(19.1, 20.4)

Tags

CCSS.HSS.IC.B.4

4.

MULTIPLE CHOICE QUESTION

15 mins • 1 pt

In a sample of 10 randomly selected women, it was found that their mean height was 63.4 inches. From

previous studies, it is assumed that the standard deviation σ is 2.4 and that the population of height

measurements is normally distributed. Construct the 95% confidence interval for the population mean.

(61.9, 64.9)

(58.1, 67.3)

(59.7, 66.5)

(60.8, 65.4)

Tags

CCSS.HSS.IC.B.4

5.

MULTIPLE CHOICE QUESTION

15 mins • 1 pt

Find the critical value, tc for c = 0.99 and n = 10.

3.169

3.250

2.262

1.254

6.

MULTIPLE CHOICE QUESTION

15 mins • 1 pt

Construct a 95% confidence interval for the population mean, μ. Assume the population has a normal

distribution. A sample of 20 college students had mean annual earnings of $3120 with a standard deviation of

$677.

($1324, $1567)

($2135, $2567)

($2803, $3437)

($2657, $2891)

Tags

CCSS.HSS.IC.B.4

7.

MULTIPLE CHOICE QUESTION

15 mins • 1 pt

A sample size of n = 64 is drawn from a population whose standard deviation is σ = 5.6.


Find the margin of error for a 99% confidence interval for µ.

1.799

1.798

1.803

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