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WorksheetsStatistics Intro
Total questions: 18
Worksheet time: 38mins
Name
Class
Date
1.
Between what two standard deviations of a normal distribution contain 68% of the data?
a)
one below and one above
b)
two below and two above
c)
two below and zero
d)
zero and two above
2.
μ = 70 , σ = 8 , X = 50 . Find z score
a)
2.5
b)
-2.5
c)
5.2
d)
-5.2
3.
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?
About what percent of the products last between 12 and 15 days?
a)
68%
b)
34%
c)
16%
d)
2.5%
4.
Given a mean of 75 and a standard deviation of 7, what percentage of scores are above 82?
a)
34%
b)
81.5%
c)
16%
d)
2.5%
5.
Given a mean of 75 and a standard deviation of 7, what percentage of scores are greater than 68?
a)
34%
b)
84%
c)
95%
d)
68%
6.
Given a mean of 75 and a standard deviation of 7, how many students out of 500 would score higher than 89?
a)
11
b)
12
c)
36
d)
237
7.
What is the median of this data set?
3 , 17 , 17 , 11 , 8 , 13 , 5 , 18
a)
11
b)
12
c)
13
d)
17
8.
What is the mode of the data?
a)
9
b)
6, 7
c)
7, 9
d)
6, 7, 9
9.
Lizzy had test scores of: 72, 94, 108, 60
What is the RANGE of her test scores?
What is the RANGE of her test scores?
a)
12
b)
72
c)
48
d)
98
10.
What is the mode in this set of numbers:
7, 14, 20, 3, 7, 14, 2, 14, 7
7, 14, 20, 3, 7, 14, 2, 14, 7
a)
7
b)
20
c)
7 & 14
d)
none of the above
11.
Find the mean number of pets. You may need to copy out the table with an extra column.
a)
0.87
b)
1.55
c)
1.68
d)
1.45
12.
Find the median number of pets.
a)
0.5
b)
1
c)
1.5
d)
2
13.
If Raul measured another tree in the orchard, which is most likely the height of the tree?
a)
12 feet
b)
21 feet
c)
3 feet
d)
19 feet
14.
How many students were greater than or equal to 60 inches tall?
a)
21
b)
11
c)
17
d)
6
15.
What is the relative frequency of leopards at the refuge?
a)
20%
b)
30%
c)
40%
d)
10%
16.
What percent of people chose gummy bears as their favorite candy?
a)
25%
b)
15%
c)
30%
d)
None of these
17.
This data is normally distributed. What percent of the data is in the shaded region?
a)
68%
b)
95%
c)
99.7%
d)
50%
18.
This data is normally distributed. What percent of the data is in the shaded region?
a)
68%
b)
95%
c)
99.7%
d)
50%
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