WorksheetsTSI STATISTICS and DATA ANALYSIS
Total questions: 15
Worksheet time: 20mins
Name
Class
Date
1.
Dr. Dre is a dentist. He needs to report on the mean number of cavities that his patients have.
{1,0,1,5,6,3,4}
{1,0,1,5,6,3,4}
a)
3.33
b)
2.85
c)
3
d)
3.5
2.
At Donald's Donuts the number of donut holes in a bag can vary. Help Donald find the mode.
12, 10, 10, 10, 13, 12, 11, 13, 10
12, 10, 10, 10, 13, 12, 11, 13, 10
a)
13
b)
12
c)
11
d)
10
3.
Roger bowled 7 games last weekend. His scores are: 155, 165, 138, 172, 127, 193, 142. What is the range of Roger's scores?
a)
193
b)
127
c)
60
d)
66
4.
Find the median of these numbers:
4, 2, 7, 4, 3
4, 2, 7, 4, 3
a)
2
b)
5
c)
7
d)
4
5.
What is the variance for the data given:
5, 10, 7, 12, 0, 20, 15, 22, 8, 2
5, 10, 7, 12, 0, 20, 15, 22, 8, 2
a)
47.47
b)
102.01
c)
52.77
d)
81
6.
What is the variance of the data set?
a)
72
b)
21.4
c)
533.67
d)
395.7
7.
Which city has a higher median?
a)
Millersburg
b)
Arcadia
8.
Which box and whisker plot has the smallest lower quartile (Q1)?
a)
Top plot
b)
Bottom plot
9.
What is the standard deviation for the data given:
{11, 22, 18, 91, 68, 45, 33, 71, 19}
{11, 22, 18, 91, 68, 45, 33, 71, 19}
a)
26.82
b)
28.45
c)
809.41
d)
719.31
10.
Given a normal distribution, what percentage of all values fall within 1 standard deviation from the mean?
a)
34%
b)
68%
c)
95%
d)
13.5%
11.
Given a normal distribution, with a mean of 65 an a standard deviation of 8, what percentage of values are within the interval [41,81]?
a)
95%
b)
99.7%
c)
97.5%
d)
97.35%
12.
Suppose a data set is distributed normally. The mean is 125 and standard deviation is 7. What data value is 2 standard deviations above the mean?
a)
111
b)
153
c)
139
d)
118
13.
601 freshman at Woodrow Wilson took an Algebra test. The scores were distributed normally with a mean of 68 and a standard deviation of 6. How many students scored between 56 and 80?
a)
570
b)
408
c)
489
d)
599
14.
479 freshman at Woodrow Wilson took an Algebra test. The scores were distributed normally with a mean of 68 and a standard deviation of 6. How many students scored between 62 and 86?
a)
325
b)
390
c)
401
d)
455
15.
Suppose that a certain insect has a mean lifespan of 5.6 days with a standard deviation of 1.2 days. Assume the lifespan is normally distributed. Calculate the percentage of insects with a lifespan between 3.2 and 8 days.
a)
34%
b)
95%
c)
84%
d)
68%
100 %
