Unit 8 Review CP SMOD
Authored by Laura Snell
Mathematics
12th Grade
CCSS covered
Used 1+ times
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33 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
A sample of five test scores is 85, 93, 91, 83, 70. What is the sample mean used as the point estimate for the class mean?
86.4 points
85.0 points
84.4 points
83.8 points
Tags
CCSS.HSS.IC.B.4
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Which statement best defines a point estimate in this context?
The sample mean as our best guess
The population mean known exactly
The median of the sample scores
The difference between two sample means
Tags
CCSS.HSS.IC.B.4
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Why won’t every group obtain the same point estimate from random samples of five scores?
Rounding rules differ by class
Population mean constantly changing
Calculation mistakes in groups
Sampling variability across samples
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
You want to build a 95% confidence interval by adding and subtracting the same number from 84.4. If you choose 10, what interval do you get?
75.4 to 93.4
72.4 to 96.4
74.4 to 94.4
70.4 to 98.4
Tags
CCSS.HSS.IC.B.4
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
In a confidence interval, what does the margin of error represent?
Proportion outside the interval
Sample’s standard deviation
True population parameter
Amount added and subtracted
Tags
CCSS.HSS.IC.B.4
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
A group reports an interval of (81, 89). What is their point estimate and margin of error?
Point 85, margin 4
Point 85, margin 8
Point 84, margin 4
Point 84, margin 8
Tags
CCSS.HSS.IC.B.4
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
An interval from 74.4 to 94.4 is built around 84.4. Does this interval support the claim that the mean score is 84?
No, 84 lies outside
Yes, 84 lies inside
Yes, interval equals 84
No, interval excludes all
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