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Statistics
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Business Statistics Study Set 2
Quiz 3: Descriptive Statistics
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Question 21
Multiple Choice
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.What is the mean absolute deviation for this sample data?
Question 22
Multiple Choice
A sample was taken of the salaries of four employees from a large company.The following are their salaries (in thousands of dollars) for this year: 33,36,41,and 47.The median of their salaries is approximately
Question 23
Multiple Choice
According to Chebyshev's Theorem,approximately how many values in a large data set will be within 2 standard deviations of the mean?
Question 24
Multiple Choice
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 38,33,36,47,and 41.What is the standard deviation for this sample data?
Question 25
Multiple Choice
The empirical rule says that approximately what percentage of the values would be within 1 standard deviation of the mean in a bell shaped set of data?
Question 26
Multiple Choice
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 34,39,41,35,and 41.The mean time (in minutes) required for this trip was _______.
Question 27
True/False
A box and whisker plot is determined from the mean,the smallest and the largest values,and the lower and upper quartile.
Question 28
Multiple Choice
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?
Question 29
Multiple Choice
A statistics student made the following grades on 7 tests: 76,82,92,95,79,86,and 92.What is the mean grade?
Question 30
Multiple Choice
A sample was taken of the salaries of four employees from a large company.The following are their salaries (in thousands of dollars) for this year: 33,36,41,and 47.The variance of their salaries is approximately
Question 31
Multiple Choice
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 34,39,41,35,and 41.The median time (in minutes) required for this trip was _______.
Question 32
Multiple Choice
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 38,33,36,47,and 41.What is the variance for this sample data?
Question 33
Multiple Choice
A statistics student made the following grades on 7 tests: 76,82,92,95,79,86,and 92.What is the mode?
Question 34
True/False
An outlier of a data set is determined from the lower and upper quartile
Question 35
Multiple Choice
According to Chebyshev's Theorem how many values in a data set will be within 3 standard deviations of the mean?
Question 36
Multiple Choice
A statistics student made the following grades on 7 tests: 76,82,92,95,79,86,and 92.What is the median grade?
Question 37
Multiple Choice
The mean life of a particular brand of light bulb is 1200 hours and the standard deviation is 50 hours.We can conclude that at least 75% of this brand of bulbs will last between _______.
Question 38
True/False
If the median of a distribution is greater than mean,then the distribution is skewed to the left.
Question 39
Multiple Choice
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 34,39,41,35,and 41.The mode time required for this trip was _______.