AnswersVA StatisticsData Analysis

Data Analysis — Test Answers

25 verified answers2 views
1
Free Preview

The five-number summary for the lengths of songs, in minutes, performed by a popular music group is given. Minimum: 1 point 8 cap q sub 1 : 3 point 3 Median: 3 point 8 cap q sub 3 : 4 point 5 Maximum: 9 point 2 What is the IQR for the distribution of song lengths?

A
1 point 5
B
1 point 2
C
0 point 5
D
0 point 7
2
Free Preview

A state tourist guide provides information on summer vacation towns. Some of the towns and related information are given in the table. Town Average Temp ( degree F) Number of Hotels Beach Access? Location Spring Haven 73 point 2 12 yes West Prineville 75 point 1 15 no North Juniper Lake 70 point 3 4 yes West Crestview 68 point 7 18 no South What are the individuals in the data set?

A
average temperatures
B
locations
C
towns
D
beach access
3

IQ scores are collected from a sample of students at a large university. The scores are shown. 99, 100, 105, 104, 102, 105, 105, 121, 104 What is the median IQ score for this sample?

A
105
B
102
C
110
D
104
4

As an introduction to probability, a student is asked to roll a fair, six-sided number cube seven times. The results of those seven rolls are shown. 1 , 4 , 4 , 4 , 4 , 6 , 5 What is the range of the data?

A
4
B
1
C
1 point 5 3
D
5
5

In a large city, commuter trains are used to transport people into the downtown area. Trains arrive many times a day to a downtown station. While most are on time, some are late. The table shows on-time data from the past week. Train Status On Time Late Total Day of the Week Monday 32 8 40 Tuesday 24 16 40 Wednesday 37 3 40 Thursday 29 11 40 Friday 30 20 50 Total 152 58 210 What percentage of trains were late in this particular week? Round the answer to four decimal places.

A
72 point 4 percent
B
40 point 0 percent
C
38 point 2 percent
D
27 point 6 percent
6

Joe is interested in the prices of homes sold in his area. He found a list of the selling prices of 50 homes for the past month. Most of the homes sold for $100,000–$350,000, but there were a few that sold for more than $1,000,000. Which of the following statements is true about the mean and median selling price for the ​​​​​​​50 homes?

A
The actual selling prices are needed to determine this.
B
The mean is greater than the median.
C
The mean and median are equal.
D
The mean is less than the median.
7

A sample of adults was asked to choose their favorite sport to watch from a list of four sports. Age Range 18 – 30 31 – 50 51 plus Total Sport Football 15 19 17 51 Baseball 7 12 18 37 Basketball 15 8 11 34 Soccer 12 9 6 27 Total 49 48 52 149 What proportion of those surveyed chose basketball as their favorite sport?

A
15 over 49
B
34 over 149
C
18 over 52
D
37 over 149
8

The relative frequency table given displays the proportion of 40 residents in an apartment complex who prefer certain social media sites. Upstart Aster Babble Techy 0 point 1 0 0 point 2 5 0 point 3 5 0 point 3 0 Which of the following is the corresponding frequency table?

A
Table with 4 columns and 2 rows.Row 1: Column 1, 'Upstart'; Column 2, 'Aster'; Column 3, 'Babble'; Column 4, 'Techy' Row 2: Column 1, '10'; Column 2, '25'; Column 3, '35'; Column 4, '30'
B
Table with 4 columns and 2 rows.Row 1: Column 1, 'Upstart'; Column 2, 'Aster'; Column 3, 'Babble'; Column 4, 'Techy' Row 2: Column 1, '4'; Column 2, '10'; Column 3, '14'; Column 4, '12'
C
Table with 4 columns and 2 rows.Row 1: Column 1, 'Upstart'; Column 2, 'Aster'; Column 3, 'Babble'; Column 4, 'Techy' Row 2: Column 1, '4'; Column 2, '14'; Column 3, '10'; Column 4, '12'
D
Table with 4 columns and 2 rows.Row 1: Column 1, 'Upstart'; Column 2, 'Aster'; Column 3, 'Babble'; Column 4, 'Techy' Row 2: Column 1, '8'; Column 2, '12'; Column 3, '10'; Column 4, '10'
9

An appliance store sells microwave ovens and has many different styles to choose from. A handout from the store contains details about brand, price, number of power settings, and color. What are the individuals in this data set?

A
brands
B
colors
C
microwave ovens
D
prices
10

Which of the following pie charts could be equivalent to the bar graph?

A
Image with description A pie chart titled eye colors. Brown, 30 percent; green, 20 percent; hazel, 18 percent; blue, 25 percent; grey, 7 percent.
B
Image with description A pie chart titled eye colors. Brown, 30 percent; green, 20 percent; hazel, 7 percent; blue, 25 percent; grey, 18 percent.
C
Image with description A pie chart titled eye colors. Brown, 25 percent; green, 20 percent; hazel, 18 percent; blue, 30 percent; grey, 7 percent.
D
Image with description A pie chart titled eye colors. Brown, 30 percent; green, 25 percent; hazel, 20 percent; blue, 18 percent; grey, 7 percent.
11

Which of the following statements is not correct?

A
More students in the sample listed lacrosse as their favorite sport than basketball.
B
Fewer students in the sample listed volleyball as their favorite sport than football.
C
The highest percentage of teenagers in the sample listed soccer as their favorite sport.
D
More students in the sample listed basketball as their favorite sport than volleyball.
12

Which of the following is true, according to the graph?

A
There is a much smaller preference for math among those who prefer country.
B
The percentages for class preference are relatively the same among the different music groups.
C
There is a much larger preference for science among those who prefer R&B.
D
There is a much larger preference for English among those who prefer rock.
13

Based on the graph, is there an association between favorite type of music and favorite school subject?

A
There is an association because the distribution of favorite music is the same among the subject groups.
B
There is no association because the distribution of favorite music is the same among the subject groups.
C
There is an association because the distribution of favorite music differs among the subject groups.
D
There is no association because the distribution of favorite music differs among the subject groups.
14

Which of the following best describes the shape of this distribution?

A
unimodal symmetric
B
skewed to the right
C
skewed to the left
D
bimodal symmetric
15

Which of the following statements is false?

A
As the number of years in college increases, the percentage of students living off campus increases.
B
The largest percentage of students living on campus is in the 1st-year group.
C
As the number of years in college increases, the percentage of students living on campus increases.
D
The difference between percent of students living on or off campus decreases as number of years of college increases.
16

Which correctly describes the shape of the distribution?

A
skewed right
B
roughly symmetric
C
skewed left
D
uniform
17

The five-number summary for the data is 143, 162, 168, 180, and 202. Which of the following is not a true statement?

A
Approximately 75 percent of the arm spans are less than 180 cm.
B
Approximately 25 percent of the arm spans are less than 180 cm.
C
Approximately 50 percent of the arm spans are less than 168 cm.
D
Approximately 75 percent of the arm spans are greater than 162 cm.
18

Which of the following statements best describes the distribution?

A
The distribution of the number of snacks grabbed is skewed left with a center around 18 and varies from 12 to 45. There are possible outliers at 38, 42, and 45.
B
The distribution of the number of snacks grabbed is symmetric with a center around 18 and varies from 12 to 45. There are possible outliers at 38, 42, and 45.
C
The distribution of the number of snacks grabbed is skewed right with a center around 18 and varies from 15 to 45. There are no outliers.
D
The distribution of the number of snacks grabbed is skewed right with a center around 18 and varies from 12 to 45. There are possible outliers at 38, 42, and 45.
19

What was the mean score on the quiz?

A
7 point 5
B
10
C
8 point 5
D
9
20

Which interval contains the median movie run time?

A
120–130 minutes
B
90–100 minutes
C
100–110 minutes
D
110–120 minutes

Did you find these answers helpful?

More from this Course

practice test
18 verified answers

Practice Test

Quiz
10 verified answers

Quiz

Quiz
10 verified answers

Quiz