AP Stat
Authored by Barbara White
Mathematics
11th Grade - University
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40 questions
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1.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
Calculate the confidence interval for the population mean at the given level of confidence: n = 65, σ = 3.14, x = 19.5, c = 0.80
(18.5, 20.5)
(19, 20)
(19.001, 19.999)
(18.9, 19.8)
2.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
Calculate the confidence interval for the population mean at the given level of confidence: n = 846, σ = 1.04, x = 7.9, c = 0.90
(7.8412, 7.9588)
(6.999, 7.859)
(8.844, 9.544)
(5.999, 6.859)
3.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
If the confidence level is 90%, what is the associated critical z value (Za/2)?
2.557
-1.645
1.645
-2.557
4.
MULTIPLE CHOICE QUESTION
20 sec • 1 pt
If a sample of 225 students have a mean test score of 90, what is the point estimate?
90.5
91
90
90.1
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is required to create a t-distribution?
Population mean and sample mean
Population distribution and sample size
Z-interval
Confidence interval
6.
MULTIPLE CHOICE QUESTION
20 sec • 1 pt
If 656 randomly selected people spend a mean of $86 per week on lunch. What is the best point estimate for the mean amount of money spent per week on lunch for all 656 people?
$86
$67
$80
$68
7.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
Value of t0.025 for a t-distribution with 25 degrees of freedom.
-2.060
2.060
1.555
-1.555
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