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Statistics Quiz Review

Total questions: 20

Worksheet time: 29mins

Name
Class
Date
1.
How many students were greater than or equal to 60 inches tall?
a)
21
b)
11
c)
17
d)
6
2.
How many students spent 7 hours doing homework that week?
a)
1
b)
3
c)
5
d)
6
3.

What is the value of the lower quartile (Q1)?

a)

3

b)

8

c)

10

d)

15

4.
When finding median and the middle has two numbers instead of one, what do you do?
a)
Take the higher number
b)
Take the lower number
c)
Take both
d)
Take the average
5.

Which best represents the Interquartile Range?

a)

15

b)

93

c)

85

d)

78

6.

Which of the following lists all parts of the five number summary?

a)

Mean, Median, Mode, Range, and Total

b)

Minimum, Quartile 1, Median, Quartile 3, and Maximum

c)

Smallest, Q1, Q2, Q3, and n

d)

Minimum, Maximum, Range, Mean, and Median

7.
Which has a larger IQR?
a)
Zach
b)
Steven
c)
They have the same IQR
8.

What is the sample standard deviation for the given data set:

5, 10, 7, 12, 0, 20, 15, 22, 8, 2

a)

6.89

b)

10.1

c)

7.26

d)

9

9.
This data is normally distributed.  What percent of the data is in the shaded region?
a)
68%
b)
95%
c)
99.7%
d)
50%
10.
What shape is a normal distribution curve?
a)
Half curve
b)
Round curve
c)
Bell curve
d)
Square curve
11.
What is the the total area under the standard normal distribution curve?
a)
100
b)
25
c)
.5
d)
1
12.

According to the empirical rule for a Normal Distribution, what percentage of data falls within 1 standard deviation?

a)

25%

b)

68%

c)

95%

d)

99.7%

13.

According to the empirical rule for a Normal Distribution, how much of the data falls within 3 standard deviations?

a)

25%

b)

68%

c)

95%

d)

99.7%

14.
The shelf life of a particular dairy product is normally distributed with a mean of 12 days and a standard deviation of 3 days.

About what percent of the products last between 12 and 15 days?
a)
68%
b)
34%
c)
16%
d)
2.5%
15.
The 40 yards sprint times for a soccer team are found to be normally distributed with a mean of 5.2 seconds and a standard deviation of 0.3 seconds.  What is the z-score for a player who runs a time of 5.6 seconds?
a)
-1.33
b)
1.33
c)
0.88
d)
1.02
16.
The mean number of accidents a week at a company is 6.4 with a standard deviation of 1.5.  What proportion of weeks would you expect to have less than 5 accidents?
a)
0.6915
b)
0.1762
c)
0.8238
d)
-0.93
17.
In a factory, the weight of the concrete poured into a mold by a machine follows a normal distribution with a mean of 1150 pounds and a standard deviation of 22 pounds. Approximately 95% of molds filled by this machine will hold weights in what interval? 
a)
1084 to 1216 pounds 
b)
1106 to 1150 pounds 
c)
1106 to 1194 pounds 
d)
1128 to 1172 pounds
18.

A 5th grader takes a test (mean=125, SD=15) and scores a 148. What is the child's percentile rank?

a)

93%

b)

68%

c)

7%

d)

99.7%

19.

Find the z-score with 20% of data falling above it.

a)

z=-0.84

b)

z=1.84

c)

z=-1.84

d)

z=0.84

20.
The mean GPA of students in a course at UCDavis is 3.2 with a standard deviation of 0.3. What percent of students in the course have a GPA between  2.9 and 3.8? 
a)
81.5%
b)
47.5%
c)
68%
d)
95%

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