
Chapter 18 Quiz
Quiz
•
Mathematics
•
12th Grade
•
Hard
Standards-aligned
Joshua Sparks
Used 23+ times
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10 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
A certain population is strongly skewed to the right. We want to estimate its mean, so we will
collect a sample. Which should be true if we use a large sample rather than a small one?
A) I only
B) II only
C) III only
D) II and III only
Tags
CCSS.6.SP.A.2
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
A certain population is strongly skewed to the left. We want to estimate its mean, so we collect
a sample. Which should be true if we use a large sample rather than a small one?
A) I only
B) II only
C) III only
D) I and III only
Tags
CCSS.6.SP.A.2
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Which is true about the sampling distribution of a statistic with sample size n?
A) I only
B) II only
C) III only
D) II and III
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Which of the following is true about Student’s t-models?
A) I only
B)I and II
C) I and III
D) I, II, III
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
A marketing company reviewing the length of television commercials monitored a random
sample of commercials over several days. They found that a 95% confidence interval for the
mean length (in seconds) of commercials aired daily was (23, 27). Which is true?
A) 95% of the commercials they checked were between 23 and 27 seconds long.
B) Commercials average between 23 and 27 seconds long on 95% of the days.
C) 95% of all samples would show mean commercial length between 23 and 27 seconds.
D) We’re 95% sure that the mean commercial length is between 23 and 27 seconds.
Tags
CCSS.HSS.IC.B.4
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
A coffee house owner knows that customers pour different amounts of coffee into their cups. She samples cups from 10 costumers she believes to be representative of the customers and weighs the cups, finding a mean of 12.5 ounces and standard deviation of 0.5 ounces. Assuming these cups of coffee can be considered a random sample of all cups of coffee which of the following formulas gives a 95% confidence interval for the mean weight of all cups of coffee?
Tags
CCSS.HSS.IC.B.4
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
An elementary school principal wants to know the mean number of children in families whose children attend this school. He checks all the families using the school’s registration records, and we use the computer to create a 95% confidence interval based on a t-distribution. This procedure was not appropriate. Why?
A) Since these families are from only one school, the family sizes may be skewed.
B) The entire population of families was gathered so there is no reason to do inference.
C) The recent record-setting family with twelve children is probably an outlier.
D) At a given school families are not randomly selected.
Tags
CCSS.HSS.IC.B.4
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