Question 1

The mean is the number that is in the middle when numbers are arranged in ascending or descending order.

Accepted Answer

The mean is the sum of all the numbers divided by the total number of numbers. The middle number of a set of numbers arranged in order is the median.

Question 2

The salary of five employees is listed below. $34,500; $45,000; $50,000; $40,000; $70,000
What is the mean salary?
A) $35,500
B) $47,900
C) $199,000
D) $239,500

Accepted Answer

To find the mean salary, we add up all the salaries and divide by the total number of employees.

$34,500 + $45,000 + $50,000 + $40,000 + $70,000 = $239,500

$239,500 ÷ 5 = $47,900

Therefore, the mean salary is $47,900, which is option B.

Question 3

What is the mode of the prices below? $45, $52, $40, $50, $42, $52, $55, $58, $40, $50, $32, $52
A) $40
B) $45
C) $50
D) $52

Accepted Answer

The mode is the value that appears most frequently in the given data set. In this case, $52 appears three times, which is more than any other value. Therefore, the mode of the prices is $52. The best choice is D.

Question 4

What is the median of the list below? 220, 310, 175, 222, 220, 264, 155, 289
A) 155
B) 220
C) 221
D) 231

Accepted Answer

To find the median, first arrange the numbers in ascending order: 155, 175, 220, 220, 222, 264, 289, 310. Since there are 8 numbers, the median is the average of the 4th and 5th numbers: (220 + 222) / 2 = 221.

Question 5

Cameron used the following numbers of minutes on his cell phone each month. 600, 552, 411, 325, 621, 401, 468, 324, 215, 367, 459, 367
What is the range number of minutes Cameron used each month?
A) 406
B) 401
C) 386
D) 367

Accepted Answer

To find the range, we need to subtract the smallest number from the largest number. In this case, the smallest number is 215 and the largest number is 621.

621 - 215 = 406

Therefore, the range of Cameron's cell phone minutes is 406. Option A is the correct answer.

Question 6

The =STDEV function in Excel can be used to calculate the standard deviation of a set of data values.

Accepted Answer

The statement is true. The STDEV function in Excel is used to calculate the standard deviation of a set of data values.

Question 7

Range is the measure of the spread of data around the mean in a data set.

Accepted Answer

Range is the difference between the highest and lowest values in a data set, not a measure of spread around the mean.

Question 8

The mode of a data set can be more than one number.

Accepted Answer

The mode of a data set is the value(s) that appear most frequently. If there are multiple values that appear with the same highest frequency, then all of those values are considered modes.

Question 9

The vertical axis that measures magnitude is the x -axis.

Accepted Answer

The vertical axis that measures magnitude is the y-axis. The x-axis measures time, frequency, or other independent variable.

Question 10

Tony checked the price of a computer at six different stores. The prices are listed below. $1,200; $1,900; $1,500; $2,100; $1,600; $1,500
What is the mean cost of a computer?
A) $900.67
B) $1,500
C) $1,650
D) $1,633.33

Accepted Answer

To find the mean, add all the prices together and divide by the number of prices: ($1,200 + $1,900 + $1,500 + $2,100 + $1,600 + $1,500) / 6 = $9,800 / 6 = $1,633.33.

Question 11

The standard deviation of the data set below is 62.5. 
 10, 15, 20, 30, 25

Accepted Answer

We cannot determine the standard deviation of the dataset from the given information as we do not know the mean.

Question 12

What is the mean of the prices below? $45, $52, $60, $47, $53, $23, $55, $57
A) $37
B) $49
C) $53
D) $57

Accepted Answer

To find the mean, add all the prices together and divide by the number of prices: ($45 + $52 + $60 + $47 + $53 + $23 + $55 + $57) / 8 = $392 / 8 = $49.

Question 13

Dale's paycheck was $1,200. He spent $300 on his car payment. If Dale made a pie graph to show how his paycheck was spent, the central angle of the sector showing his car payment would measure 90°.

Accepted Answer

To find the central angle of the sector representing his car payment in the pie graph, we need to use the formula:

Central angle = (Amount spent on car payment / Total paycheck) x 360°

Plugging in the values given:

Central angle = (300 / 1200) x 360 
Central angle = 0.25 x 360 
Central angle = 90°

Therefore, the statement is true and the answer is A.

Question 14

What is the median of the prices below? $452, $560, $455, $560, $440
A) $120
B) $455
C) $490
D) $560

Accepted Answer

To find the median, we must first order the prices from least to greatest: $440, $452, $455, $560, $560. The median is the middle number, which in this case is $455.

Question 15

The range of the following data set is 23. 
 15, 3, 25, 31, 2, 9, 15, 14, 5, 15

Accepted Answer

The range is calculated by subtracting the smallest value (2) from the largest value (31), which gives 29, not 23.

Question 16

The median of the list below is 25. 
 17, 13, 25, 26, 13, 9, 28, 33, 32

Accepted Answer

The median is the middle value when a list is placed in order. When this list is ordered, it becomes: 9, 13, 13, 17, 25, 26, 28, 32, 33. The middle value is 25, which is the median.

Question 17

The function in Excel used to calculate the middle value in a data set is =MIDDLE.

Accepted Answer

There is no function called =MIDDLE in Excel. The function used to calculate the middle value in a data set is =MEDIAN.

Question 18

What is the standard deviation of the following set of data? 18, 14, 12, 16, 22, 26
A) 4.8
B) 18
C) 22.7
D) 136

Accepted Answer

1. Find the mean: (18 + 14 + 12 + 16 + 22 + 26) ÷ 6 = 18
2. Subtract the mean from each value and square the result:
(18-18)² + (14-18)² + (12-18)² + (16-18)² + (22-18)² + (26-18)² 
= 0² + (-4)² + (-6)² + (-2)² + 4² + 8²
= 0 + 16 + 36 + 4 + 16 + 64 = 136
3. Divide the sum by the number of values and take the square root:
√(136 ÷ 6) ≈ 4.8

Question 19

What is the mode of the list below? 102, 105, 111, 104, 123, 132, 204, 201, 106, 116, 115, 142, 131
A) no mode
B) 105
C) 106
D) 132

Accepted Answer

The answer of What is the mode of the list...

Question 20

Coach Ralph recorded the number of free throws made by the players on a team. 12, 10, 9, 15, 18, 11, 13, 8, 14, 7, 19, 6
The number of free throws were grouped into four equal classes (0-4, 5-9, 10-14, 15-19). How many players made between 10 and 14 free throws?
A) 1
B) 2
C) 5
D) 6

Accepted Answer

There are five players who made between 10 and 14 free throws: 12, 10, 11, 13, and 14.

Quiz 15: Business Statistics

The mean is the number that is in the middle when numbers are arranged in ascending or descending order.

The salary of five employees is listed below. $34,500; $45,000; $50,000; $40,000; $70,000 What is the mean salary?

What is the mode of the prices below? $45, $52, $40, $50, $42, $52, $55, $58, $40, $50, $32, $52

What is the median of the list below? 220, 310, 175, 222, 220, 264, 155, 289

Cameron used the following numbers of minutes on his cell phone each month. 600, 552, 411, 325, 621, 401, 468, 324, 215, 367, 459, 367 What is the range number of minutes Cameron used each month?

The =STDEV function in Excel can be used to calculate the standard deviation of a set of data values.

Range is the measure of the spread of data around the mean in a data set.

The mode of a data set can be more than one number.

The vertical axis that measures magnitude is the x -axis.

Tony checked the price of a computer at six different stores. The prices are listed below. $1,200; $1,900; $1,500; $2,100; $1,600; $1,500 What is the mean cost of a computer?

The standard deviation of the data set below is 62.5. 10, 15, 20, 30, 25

What is the mean of the prices below? $45, $52, $60, $47, $53, $23, $55, $57

Dale's paycheck was $1,200. He spent $300 on his car payment. If Dale made a pie graph to show how his paycheck was spent, the central angle of the sector showing his car payment would measure 90°.

What is the median of the prices below? $452, $560, $455, $560, $440

The range of the following data set is 23. 15, 3, 25, 31, 2, 9, 15, 14, 5, 15

The median of the list below is 25. 17, 13, 25, 26, 13, 9, 28, 33, 32

The function in Excel used to calculate the middle value in a data set is =MIDDLE.

What is the standard deviation of the following set of data? 18, 14, 12, 16, 22, 26

What is the mode of the list below? 102, 105, 111, 104, 123, 132, 204, 201, 106, 116, 115, 142, 131

Coach Ralph recorded the number of free throws made by the players on a team. 12, 10, 9, 15, 18, 11, 13, 8, 14, 7, 19, 6 The number of free throws were grouped into four equal classes (0-4, 5-9, 10-14, 15-19) . How many players made between 10 and 14 free throws?