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Business Statistics - Numerical Descriptive Measures

Authored by Minh Doan

Computers

University

Used 1+ times

Business Statistics -  Numerical Descriptive Measures
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7 questions

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1.

MULTIPLE CHOICE QUESTION

2 mins • 1 pt

The empirical rule says that approximately what percentage of the values would be within 2 standard deviations of the mean in a bell-shaped set of data?

95%
68%
50%
97.7%
100%

2.

MULTIPLE CHOICE QUESTION

2 mins • 1 pt

A statistics student made the following grades on 5 tests: 84, 78, 88, 78, and 72.

What is the mean grade?

78
80
72
84
88

3.

MULTIPLE CHOICE QUESTION

2 mins • 1 pt

A statistics student made the following grades on 5 tests: 84, 78, 88, 78, and 72.

What is the median grade?

88
72
78
80
82

4.

MULTIPLE CHOICE QUESTION

2 mins • 1 pt

A statistics student made the following grades on 5 tests: 84, 78, 88, 78, and 72.
What is the mode?

78
80
88
84
82

5.

MULTIPLE CHOICE QUESTION

2 mins • 1 pt

A commuter travels many miles to work each morning. She has timed this trip 5 times

during the last month. The time (in minutes) required to make this trip was 44, 39, 41,

35, and 41. The mean time required for this trip was 40 minutes.

What is the variance for this sample data?

8.8
11
0
3
-2

6.

MULTIPLE CHOICE QUESTION

2 mins • 1 pt

A commuter travels many miles to work each morning. She has timed this trip 5 times

during the last month. The time (in minutes) required to make this trip was 44, 39, 41,

35, and 41. The mean time required for this trip was 40 minutes.

What is the standard deviation for this sample data?

3.32
2.97
1.73
11
-1.4

7.

MULTIPLE CHOICE QUESTION

2 mins • 1 pt

According to Chebyshev's Theorem how many values in a data set will be within 2 standard deviations of the mean?

At least 75%
At least 68%
At least 95%
At least 89%
At least 99%

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