Scatter Plots & Data Analysis Unit Test
12 of 1512 of 15 Items
Question
Use the table to answer the question.
Age For Against No Opinion
21–30 40 22 18
31–40 30 50 25
Over 40 25 35 8
A poll was taken to explore the relationship between age and support for a candidate in an election. The results of the poll are summarized in the table. How many people above age 30 are for the candidate?
(1 point)
Responses
70
70
40
40
95
95
55
7 answers
The correct answer is 55. This can be found by adding the number of people aged 31-40 who are for the candidate (30) to the number of people over 40 who are for the candidate (25). 30 + 25 = 55.
Scatter Plots & Data Analysis Unit Test
13 of 1513 of 15 Items
Question
Use the table to answer the question.
Preference 7th Graders 8th Graders
Prefers Cats 36 22
Prefers Dogs 8 26
No Preference 2 6
What is the relative frequency of students who prefer dogs who are 7th graders? Round the percentage to the nearest tenth.
(1 point)
Responses
17.4%
17.4%
76.5%
76.5%
8%
8%
23.5%
13 of 1513 of 15 Items
Question
Use the table to answer the question.
Preference 7th Graders 8th Graders
Prefers Cats 36 22
Prefers Dogs 8 26
No Preference 2 6
What is the relative frequency of students who prefer dogs who are 7th graders? Round the percentage to the nearest tenth.
(1 point)
Responses
17.4%
17.4%
76.5%
76.5%
8%
8%
23.5%
The relative frequency is calculated by taking the number of 7th graders who prefer dogs (8) and dividing by the total number of students (7th and 8th graders) who prefer dogs (8 + 26 = 34).
Relative Frequency = (Number of 7th graders who prefer dogs) / (Total number of students who prefer dogs)
Relative Frequency = 8 / 34 = 0.2353
Converting to a percentage and rounding to the nearest tenth:
Relative Frequency = 23.5%
So, the correct answer is 23.5%.
Relative Frequency = (Number of 7th graders who prefer dogs) / (Total number of students who prefer dogs)
Relative Frequency = 8 / 34 = 0.2353
Converting to a percentage and rounding to the nearest tenth:
Relative Frequency = 23.5%
So, the correct answer is 23.5%.
Scatter Plots & Data Analysis Unit Test
14 of 1514 of 15 Items
Question
Use the table to answer the question.
Hip-Hop Pop Totals
10th Grade 112 53 165
11th Grade 98 147 245
Total 210 200 410
Examine the data from a survey of 10th and 11th graders about which music genre they prefer.
Using relative frequencies, which of the following is true?
(1 point)
Responses
If you like pop, you are more likely to be a 10th grader.
If you like pop, you are more likely to be a 10th grader.
If you are an 11th grader, you are more likely to prefer hip-hop.
If you are an 11th grader, you are more likely to prefer hip-hop.
If you like hip-hop, you are almost equally likely to be from 10th or 11th grade.
If you like hip-hop, you are almost equally likely to be from 10th or 11th grade.
If you are a 10th grader, you are more likely to prefer pop
14 of 1514 of 15 Items
Question
Use the table to answer the question.
Hip-Hop Pop Totals
10th Grade 112 53 165
11th Grade 98 147 245
Total 210 200 410
Examine the data from a survey of 10th and 11th graders about which music genre they prefer.
Using relative frequencies, which of the following is true?
(1 point)
Responses
If you like pop, you are more likely to be a 10th grader.
If you like pop, you are more likely to be a 10th grader.
If you are an 11th grader, you are more likely to prefer hip-hop.
If you are an 11th grader, you are more likely to prefer hip-hop.
If you like hip-hop, you are almost equally likely to be from 10th or 11th grade.
If you like hip-hop, you are almost equally likely to be from 10th or 11th grade.
If you are a 10th grader, you are more likely to prefer pop
To determine which statement is true by using relative frequencies, we need to compare the preferences of each grade for each genre.
- For 10th graders:
- Relative frequency of liking Hip-Hop: 112 / 165 ≈ 0.6788
- Relative frequency of liking Pop: 53 / 165 ≈ 0.3212
- For 11th graders:
- Relative frequency of liking Hip-Hop: 98 / 245 ≈ 0.4
- Relative frequency of liking Pop: 147 / 245 ≈ 0.6
Comparing these results:
- 11th graders are more likely to prefer Pop compared to 10th graders.
- 10th graders are more likely to prefer Hip-Hop compared to 11th graders.
Therefore, the correct statement is:
- If you like pop, you are more likely to be a 10th grader.
- For 10th graders:
- Relative frequency of liking Hip-Hop: 112 / 165 ≈ 0.6788
- Relative frequency of liking Pop: 53 / 165 ≈ 0.3212
- For 11th graders:
- Relative frequency of liking Hip-Hop: 98 / 245 ≈ 0.4
- Relative frequency of liking Pop: 147 / 245 ≈ 0.6
Comparing these results:
- 11th graders are more likely to prefer Pop compared to 10th graders.
- 10th graders are more likely to prefer Hip-Hop compared to 11th graders.
Therefore, the correct statement is:
- If you like pop, you are more likely to be a 10th grader.
the image to answer the question.
A scatterplot shows the number of cups of coffee sold versus temperature.
The horizontal axis shows temperature, in degrees Fahrenheit, ranging from 0 to 70 in increments of 5, with an initial jump from 0 to 25. The vertical axis shows number of cups of coffee sold, ranging from 0 to 60 in increments of 10. A kink is shown on the horizontal axis close to origin. A tightly packed cluster of data plots is plotted between 30 to 37 on the horizontal axis and 42 to 48 on the vertical axis. A loosely packed cluster of data plots is plotted between 40 to 51 on the horizontal axis 30 and 38 on the vertical axis and. A dot is plotted at 62 on the horizontal axis and 5 on the vertical axis.
Numbers of Cups of Coffee Sold Versus Temperature
Interpret the scatterplot by describing any outliers and patterns of clustering.
5 sentenses short and 8th grade level
(4 points)
A scatterplot shows the number of cups of coffee sold versus temperature.
The horizontal axis shows temperature, in degrees Fahrenheit, ranging from 0 to 70 in increments of 5, with an initial jump from 0 to 25. The vertical axis shows number of cups of coffee sold, ranging from 0 to 60 in increments of 10. A kink is shown on the horizontal axis close to origin. A tightly packed cluster of data plots is plotted between 30 to 37 on the horizontal axis and 42 to 48 on the vertical axis. A loosely packed cluster of data plots is plotted between 40 to 51 on the horizontal axis 30 and 38 on the vertical axis and. A dot is plotted at 62 on the horizontal axis and 5 on the vertical axis.
Numbers of Cups of Coffee Sold Versus Temperature
Interpret the scatterplot by describing any outliers and patterns of clustering.
5 sentenses short and 8th grade level
(4 points)
In the scatterplot showing the number of cups of coffee sold versus temperature, there is a noticeable outlier where 62 cups of coffee were sold at 5 degrees Fahrenheit. The data is clustered tightly between 30 to 37 degrees Fahrenheit and 42 to 48 cups of coffee sold, suggesting a pattern of high sales within this temperature range. Another loosely clustered group is seen between 40 to 51 degrees Fahrenheit and 30 to 38 cups sold, indicating another pattern. The kink in the horizontal axis close to the origin may signify a shift in sales behavior at lower temperatures. Overall, the data shows different patterns of clustering and a notable outlier.
1 answer