
Prob and Stat Ch 6 Review
Authored by Anne Becker
Mathematics
12th Grade
Used 13+ times

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16 questions
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1.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Find the critical value for c = 0.95 and n = 15
1.781
2.145
2.131
2.101
2.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
A random sample of 120 students has a grade point average with a standard deviation of 0.6. Find the margin of error if c = 0.90
0.01
0.89
0.10
0.09
3.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
A survey of 800 non-fatal accidents showed that 373 involved the use of a cell phone. Construct a 98% confidence interval for the proportion of non-fatal accidents that involved the use of a cell phone.
(0.43, 0.51)
(0.47, 0.53)
(0.25, 0.75)
.04
4.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
A random sample of 85 tudents has a test score average with a standard deviation of 5.5. Find the margin of error if c=0.95
.13
1.96
1.17
1.22
5.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
A random sample of 120 students has a grade point average with a mean of 3.0 and with a standard
deviation of 0.75. Construct the confidence interval for the population mean, if c = 0.98.
.16
(2.75, 3.25)
(2.82, 3.18)
(2.84, 3.16)
6.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
A random sample of 62 fluorescent light bulbs has a mean life of 705 hours with a standard deviation
of 25 hours. Construct a 90% confidence interval for the population mean.
(699.76, 710.24)
5.24
(699.78, 710.24)
1.65
7.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
A random sample of 62 fluorescent light bulbs has a mean life of 705 hours with a standard deviation
of 25 hours. Find the margin of error if c = 0.90
(699.76, 710.24)
5.24
(699.78, 710.24)
1.65
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