Question
QUESTION 15 The t distribution should be used when ... the population to be sampled is not normal the population to be sampled is unimodal
QUESTION 15
The t distribution should be used when ...
the population to be sampled is not normal
the population to be sampled is unimodal
the sampling distribution is normal and the sample size is small
the standard deviation of the population is known
QUESTION 16
A type I error means
That I accepted the null hypothesis when it was really false
That I rejected the null hypothesis when it was really true
I don't have a sample size to make a decision
That my positive hypothesis is wrong
QUESTION 17
If in an ice cream shop I can select 1 of 10 different flavors, with 1 of 5 different additives and 1 of 3 different types of cones. How many different combinations can I make with one of those flavors, one of the aggregates, and one of the cones?
10
fifty
150
300
QUESTION 18
The following contingency table records the smoking habit of 370 college students:
Non-smokers (C) Intermediate smoker (D) Smoker (G) Total
Men (A) 135 13 5 153
Women (B)
187 21 9 217
Total 322 34 14 370
If a student is randomly selected, what is the probability that they are non-smokers?
135/322
187/322
322/370
135/370
QUESTION 19
As the sample size increases
The confidence interval also increases (gets larger)
The confidence interval decreases (becomes smaller)
The confidence interval remains the same
The population mean increases.
QUESTION 20
By the Central Limit Theorem, the traditional sample size that distinguishes a large sample size from a small sample size is when it is greater than
100
30
500
twenty
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