Sigma Notation and Calculating the Arithmetic Mean Quiz
The question sheet
Reveal any answer as you study-
In problem 95, from how large a population is the sample of 10 prices chosen?
- 10 items
- 100 items
- 20 items
- 50 items
Reveal answer
Answer: 100 items
Source evidence
PDF page 120: 95. A sample of 10 prices is chosen from a population of 100 similar items. The values obtained from the sample, and the
-
How many prices are chosen in the sample for problem 95?
- 100
- 7
- 10
- 20
Reveal answer
Answer: 10
Source evidence
PDF page 120: 95. A sample of 10 prices is chosen from a population of 100 similar items. The values obtained from the sample, and the
-
In the population table for problem 95, what is the frequency of the price $20?
- 15
- 35
- 2
- 20
Reveal answer
Answer: 20
Source evidence
PDF page 120: Prices of the Population Frequency $20 20 $21 35 $22 15 $23 10 $24 18 $25 2
-
In the population table for problem 95, which price has the smallest frequency?
- $25
- $20
- $21
- $23
Reveal answer
Answer: $25
Source evidence
PDF page 120: Prices of the Population Frequency $20 20 $21 35 $22 15 $23 10 $24 18 $25 2
-
In problem 96, how many people were given the standardized test?
- One hundred
- Ten
- Twenty
- Seven
Reveal answer
Answer: Ten
Source evidence
PDF page 121: 96. A standardized test is given to ten people at the beginning of the school year with the results given in Table 2.76 below.
-
When was the standardized test in problem 96 first given?
- Every month
- At the end of the year
- In the middle of the semester
- At the beginning of the school year
Reveal answer
Answer: At the beginning of the school year
Source evidence
PDF page 121: 96. A standardized test is given to ten people at the beginning of the school year with the results given in Table 2.76 below.
-
In problem 96, the same people were tested again at what time?
- After the summer
- After one week
- At the start of the year
- At the end of the year
Reveal answer
Answer: At the end of the year
Source evidence
PDF page 121: At the end of the year the same people were again tested.
-
What does part a of problem 96 ask you to find?
- The largest score
- The average improvement
- The population mean
- The lowest score
Reveal answer
Answer: The average improvement
Source evidence
PDF page 121: a. What is the average improvement?
-
Part b of problem 96 asks whether it matters if you subtract what?
- The frequencies or the totals
- The means, or the individual values
- The highest or lowest scores
- The stems or the leaves
Reveal answer
Answer: The means, or the individual values
Source evidence
PDF page 121: b. Does it matter if the means are subtracted, or if the individual values are subtracted?
-
In problem 96, what was student 1's beginning score?
- 1120
- 1100
- 980
- 1030
Reveal answer
Answer: 1100
Source evidence
PDF page 121: Student Beginning Score Ending Score 1 1100 1120 2 980 1030 3 1200 1208 4 998 1000 5 893 948 6 1015 1030 7 1217 1224 8 1232 1245 9 967 988 10 988 997
-
In problem 97, how many students are in the small class?
- 82
- 7
- 10
- 20
Reveal answer
Answer: 7
Source evidence
PDF page 121: 97. A small class of 7 students has a mean grade of 82 on a test. If six of the grades are 80, 82,86, 90, 90, and 95, what is
-
In problem 97, what is the mean grade of the class of 7 students?
- 80
- 82
- 90
- 86
Reveal answer
Answer: 82
Source evidence
PDF page 121: 97. A small class of 7 students has a mean grade of 82 on a test. If six of the grades are 80, 82,86, 90, 90, and 95, what is
Introductory Business Statistics
Introductory Business Statistics by OpenStax, used under CC BY 4.0. Changes made by Stratacademy.
Make your own — free
Turn any notes into a game in under a minute. Free to start.