10th
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12th
grade

Mathematics

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Darin Smyth

5 years

Mathematics

10th -

12thgrade

9-17 TEST - Unit 2 Descriptive Statistics

Darin Smyth

59
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18 questions

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1. Multiple Choice
15 minutes
1 pt
The table of frequency above represent the grades earned by 144 students in World History.

What is the relative frequency of those who earned a B? Round to the nearest hundredth.
$0.76$
$0.22$
$0.32$
$0.44$
2. Multiple Choice
15 minutes
1 pt
The table of frequency above represent the grades earned by 144 students in World History.

What is the cumulative frequency of those who earned at least a C? Round to the nearest whole number.
$34$
$64$
$110$
$144$
3. Multiple Choice
15 minutes
1 pt
A baby furniture store has number a number of different dressers. The table shows the number of dressers and their heights.
Which histogram correctly represents the information in the given table?
4. Multiple Choice
15 minutes
1 pt
A baby furniture store has number a number of different dressers. The table shows the number of dressers and their heights.
What is the best description for the shape of data?
Skewed left
skewed right
symmetric
uniform
5. Multiple Choice
15 minutes
1 pt
Nine students were asked how many times each week they buy lunch at school. The results shown above.
Which of the following dot plots correctly represents this data?
6. Multiple Choice
15 minutes
1 pt
Nine students were asked how many times each week they buy lunch at school. The results shown above.

What is the shape of the data?
Skewed right
Skewed left
Symmetric
Uniform
7. Multiple Choice
15 minutes
1 pt
The table above displays the result of a survey of car preferences of a sample of adults. Use the data in two-way frequency table above in selecting the correct interpretation of the conditional relative frequency $\frac{135}{180}.$
135 of the total number of people who prefer SUVs were females
135 out of the 180 people surveyed prefer SUVs
135 out of the 180 females surveyed prefer SUVs
8. Multiple Choice
15 minutes
1 pt
The table above displays the result of a survey of car preferences of a sample of adults. Use the data in two-way frequency table above in selecting the correct interpretation of the conditional relative frequency $\frac{135}{156}.$
135 of the 156 people who prefer SUVs were females
135 out of the 156 females surveyed prefer SUVs
Out of the 156 surveyed, 135 are females
9. Multiple Choice
15 minutes
1 pt
Above are the boxplots representing two sets of data.

Select all the statements that correctly compare the two sets of data.
The two distributions have the same shape.
Both medians are between 60 and 70.
At least 25% of both data sets are below 60.
At least 25% of both data sets are above 80.
The maximum of each data set is the same.
10. Multiple Choice
15 minutes
1 pt
Jessica surveyed her classmates to find out how many posts the make, on average, on social media in a normal day. The following data set shows her results.

a. Find the value of the mean b. value of the median
c. value of the range d. IQR
mean = 10.07
median = 10
range = 3
IQR = 12
mean = 10.07
median = 10.07
range = 12
IQR = 12
mean = 10.07
median = 10
range = 12
IQR = 3
11. Multiple Choice
15 minutes
1 pt
Using the normal distribution curve drawn above, identify the requested information below.
The percent falling between 1 standard deviation above and below the mean is ________________.
68%
95%
81.5%
99.7%
12. Multiple Choice
15 minutes
1 pt
Using the normal distribution curve drawn above, identify the requested information below.
The percent falling between 2 standard deviations above and below the mean is ________________.
68%
95%
81.5%
99.7%
13. Multiple Choice
15 minutes
1 pt
Using the normal distribution curve drawn above, identify the requested information below.
The percent falling between 3 standard deviations above and below the mean is ________________.
68%
95%
81.5%
99.7%
14. Multiple Choice
15 minutes
1 pt
In a certain statistics class, the average grade is 83 points with a standard deviation of 4.2 points. What is the z-score corresponding to a grade of 81.8 points?
$-1.2$
$1.2$
$-0.29$
$0.29$
15. Multiple Choice
15 minutes
1 pt
A normal distribution has a mean of 80 and a standard deviation of 3. What percent of data points are between 74 and 80?
13.5%
47.5%
34%
68%
16. Multiple Choice
15 minutes
1 pt
What measure of central tendency best describes the data above.
mean
median
mode
standard deviation
17. Multiple Choice
15 minutes
1 pt
Find the z-score of the value 9 whose mean is 12 with a standard deviation of 2.23.
$-0.56$
$1.35$
$-1.35$
$0.56$
18. Multiple Choice
15 minutes
1 pt
Using the empirical rule (bell-shaped distribution). Find the percentage of scores between 30 and 38 with mean score of 34 and standard deviation of 2.
$95\%$
$85.5\%$
$68\%$
$81.5\%$
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9-17 TEST - Unit 2 Descriptive Statistic...

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grade

Mathematics

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9-17 TEST - Unit 2 Descriptive Statistics

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plays

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9-17 TEST - Unit 2 Descriptive Statistic...

10th - 12thgrade

Mathematics

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10th -

12thgrade

9-17 TEST - Unit 2 Descriptive Statistics

59 plays

18 questions

Introducing new Paper mode

10th
-
12th
grade

59
plays