
Scope of Inference Statistics
Authored by Anthony Clark
Mathematics
11th Grade

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20 questions
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1.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
If the boxes (IQR) overlap, it means the result found in the sample
could be due to sampling variation
is likely to be the case
has too many errors
2.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
When looking at credits of Y12 boys and credits of Y12 girls at SSTS, if the ICI's overlap then you
cannot make the call that the median credits of Y12 boys tend to be more compared to the credits of Y12 girls
can make the call that the median credits of Y12 boys tend to be more compared to the credits of Y12 girls
3.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
A quality control inspector will measure the salt content (in milligrams) in a random sample of bags of potato chips from an hour of production. Which of the following would result in the smallest margin of error in estimating the mean salt content σ ?
90% confidence; n = 25
90% confidence; n = 50
95% confidence; n =25
95% confidence; n =50
n=100 at any confidence level
4.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
A random sample of 25 Ohio students had a mean ACT score of 21 with a standard deviation of 1.2. Which of the following is the 95% confidence interval for the true average ACT score for Ohio students?
(20.53, 21.47)
(18.648, 23.352)
(20.505, 21.495)
5.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
A college conducted a survey of randomly selected freshman about their choice of major. The table shows the results of the survey.
What inference about all freshman at this college is best supported by this information?
The number of freshmen who chose English as their major is less than the number of freshmen who are Undecided on their major.
The number of freshmen who chose Education as their major is greater than the number of freshmen who chose Science or Other as their major.
The number of freshmen who chose Business or Education as their major is less than the number of freshmen who chose Science or Engineering as their major.
The number of freshmen who chose Business as their major is greater than the number of freshmen who chose English as their major.
6.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
True or False: all samples lead to a good prediction about an entire population.
True
False
7.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
A college conducted a survey of randomly selected freshman about their choice of major. The table shows the results of the survey. What inference about all freshman at this college is best supported by this information?
The number of freshmen who chose English as their major is less than the number of freshmen who are Undecided on their major.
The number of freshmen who chose Education as their major is greater than the number of freshmen who chose Science or Other as their major.
The number of freshmen who chose Business or Education as their major is less than the number of freshmen who chose Science or Engineering as their major.
The number of freshmen who chose Business as their major is greater than the number of freshmen who chose English as their major.
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