Ch 3 Day 3 Unit 2 Quiz #1 Quantitative Data Displays
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Last updated almost 5 years ago
17 questions
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Question 1
1.
Question 2
2.
The graph below displays a fire department’s response time, which measures the time from when the alarm is sounded at the firehouse to the time the first fire engine leaves the station.
What percent of the response times were less than 50 seconds?
Notice the histogram gives relative frequencies as decimals (look carefully at the histogram intervals).
Question 3
3.
Question 4
4.
Question 5
5.
Alex records the running time—the number of minutes a movie lasts from start to finish—of 50 popular movies. The distribution of times, in minutes, is shown in the histogram below.
Describe the SHAPE of the histogram.
Hint: you need to tell me two things about the shape. Separate them by 'and' or a comma.
Question 6
6.
Question 7
7.
Thirty-four high school students were surveyed and asked how many siblings they have. The dotplot below displays the distribution of responses.
Of the 34 students that were surveyed, what percent have at least four siblings?
Round your percent to 1 place past the decimal. Ex. 76.3%
Question 8
8.
The dotplot below displays the number of math classes taken by a random sample of students at a high school.
Select the best description for the dot plot data distribution.
Question 9
9.
The dotplot below displays the number of math classes taken by a random sample of students at a high school.
What is the mode for the number of math classes?
Enter the number below.
Question 10
10.
The dotplot below displays the number of math classes taken by a random sample of 35 students at a high school.
What percent of the students took less than 4 math classes?
Enter your percent below.
Round to one place past the decimal if needed. Ex. 85.3%
Question 11
11.
The stemplot below represents the number of bite-size snacks grabbed by 32 students in an activity for a statistics class.
What percentage of the students grabbed more than 21 snacks?
Round your percentage to one place past the decimal. Ex. 78.5%
Question 12
12.
The stemplot below represents the number of bite-size snacks grabbed by 32 students in an activity for a statistics class.
What is the mode for this data set? (which number occurred the most?)
Look carefully, enter your answer below.
Question 13
13.
The stemplot displays 26 students’ scores on a 90-point statistics test.
How would you describe the shape of this data set?
Select the one that applies the best.
Remember we look at data from smallest to the largest values, from left to right. (you may need to tilt your head)
Question 14
14.
The stemplot below displays the arm spans, in centimeters, for 44 students.
What percent of the students have an arm span of at least 170 cm?
Enter your percent below.
Round the percent to one place past the decimal point. Ex. 23.7%
Question 15
15.
The stemplot below represents the number of bite-size snacks grabbed by 10 students in an activity for a statistics class.
Which could be the list of data for this stemplot?
Question 16
16.
Question 17
17.
What are the acronyms we used in class to remember what to include in the description of quantitative data distributions?
The graph below displays a fire department’s response time, which measures the time from when the alarm is sounded at the firehouse to the time the first fire engine leaves the station.
Which of the following describes the distribution?
Select all that apply, there are 3.
A spread of 10 to 90 seconds
A spread of 70 seconds
Bimodal and skewed left
Bimodal and symmetric
Bimodal and skewed right
Unimodal and skewed right
A center at 40 to <50 seconds
Unimodal and skewed left
Unimodal and Symmetric
A center at 60 to < 70 seconds
A center at 50 to < 60 seconds
20%
34%
28%
14%
The graph below displays a fire department’s response time, which measures the time from when the alarm is sounded at the firehouse to the time the first fire engine leaves the station.
Which interval contains the median (middle) response time?
20 to < 30 seconds
40 to < 50 seconds
30 to < 40 seconds
60 to < 70 seconds
50 to < 60 seconds
80 to < 90 seconds
70 to < 80 seconds
Residents in a city are charged for water usage every three months. The water bill is computed from a common fee, along with the amount of water the customers use.
The last water bills for 40 neighborhood residents are displayed in the histogram below.
Which of the following describes the distribution?
Select all that apply, there are 3.
Nothing unusual, no gaps or outliers.
A spread of $100 to $250
There is an outlier at $100 to < $125
Unimodal and skewed left
Unimodal and roughly symmetric
A spread of $250
Unimodal and skewed right
Thirty-four high school students were surveyed and asked how many siblings they have. The dotplot below displays the distribution of responses.
Describe the distribution, select all that apply, there are 3.
Nothing unusual
Spread of 0 to 8 siblings
Unimodal and skewed right, with a possible outlier at 8 siblings
A center at 2 or 3 siblings
Spread of 7 siblings
Unimodal and symmetric, with a possible outlier at 8 siblings
Unimodal and skewed left, with a possible outlier at 8 siblings
Unimodal and skewed right with a center at 4 to 5 classes.
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Unimodal and strongly skewed right.
Uniform and symmetric
15, 15, 16, 17, 19, 20, 21, 23, 32, 42
15, 16, 16, 17, 19, 21, 23, 32, 42
15, 16, 16, 17, 19, 20, 21, 23, 32, 42
15, 16, 17, 19, 20, 21, 23, 32, 42
What is the benefit of using a dot plot or stemplot over a histogram?
Select all that apply. (there are five).
The dot plot and stemplot are a good way to show the shape of the data distribution.
The dot plot and stemplot are good for displaying large sets of data.
The dot plot and stemplot are good for displaying smaller sets of data.
The dot plot and stem plot show the exact spread of the data values.
We can calculate the exact center value of the data set with the dot plot or stemplot.
Stemplots and dot plots show individual values of the data set.