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Set A={-8,-3,5,7,15}
Set B={-3,2,10,12,20]
Quantity A: The standard deviation of numbers in set A
Quantity B: The standard deviation of numbers in set B

Quantity A

The standard deviation of 1, 11, 111

Quantity B

The standard deviation of 2, 22, 222


Set A= {0.2,0.4,0.6,0.8}
Set B= {1,2,3,4}
Quantity A: The standard deviation of numbers in Set A
Quantity B: The standard deviation of numbers in Set A
The standard deviation of four numbers a, b, c, d is M, then the standard deviation of which of the following MUST be M?
Indicate all such variations.
If the standard deviation of a,b,c,d is 1,what is the standard deviation of a+1,b+1,c+1,d+1?
Each of the following linear equations defines y as a function of x for all integers x from 1 to 100. For which of the following equations is the standard deviation of the y-values corresponding to all the x-values the greatest?
What is the value of a to make the standard deviation of 1, a and 7 the least?
Set A={3,5,7,8,8,9,10,11,12}
Set B={3,5,7,9,10,11,12}
Quantity A: The standard deviation of all the numbers in Set A
Quantity B: The standard deviation of all the numbers in Set B
Data x has a distribution with a standard deviation of 5, while data y has a distribution with a standard deviation of 10.

Quantity A

The value of x which is one standard deviation above the mean

Quantity B

The value of y which is two standard deviations above the mean


The average temperature is 70 °, and the standard deviation is 6.5 °. Which of the following is within a standard deviation of the mean?
Indicate all such measure
In a number list with a mean of 6.0 and standard deviation of 1.5,the value A is one standard deviation above the mean.

Quantity A

A

Quantity B

7.2


A set of data are normally distributed with a mean of 500 and a standard deviation of 100. If there are 10,200 data between 500 and 600 inclusive, then how many figures in the data are less than 400?
In a survey of 5,500 respondents over how many books they would read per year on average, the result is normally distributed, with a mean of 19 and a standard deviation of 2. What is the average number of books read by the 880 respondents whose number of books read per year is the greatest?
The measurement of X is normally distributed with a mean of 60 and standard deviation of 30.
Quantity A: The probability when 45 < x < 60
Quantity B: The probability when x > 95
In a survey between staffs, 40% of the staffs chose only company A, 20% of the staffs chose only company B, 15% of the staffs chose both A and B, what percent of staffs chose neither A nor B? Give your answer as a percent.
________%
Of the 66 guests at a certain hotel, 40 guests enjoy dancing and 25 guests enjoy swimming. If all but 6 of the guests enjoy dancing or swimming or both, how many guests enjoy dancing but not swimming?
40 people join club X, 28 people join club Y, and 8 people join both club X and club Y. How many people join at least one club of the two clubs?
70 people choose A, or B, or both. Among them 53 choose A and 48 choose B, then how many people choose both?
75% of a group of students` grades are greater than 70, and 60% of students` grades are less than 85, what percent of students` scores are between 70 and 85? Give your answer as a percent.
______%
When testing a series of bottles of water, chemical A is found in 52% of all bottles, chemical B is found in 18% of all bottles, while chemical A and B are found in 10% of all bottles.

Quantity A

The proportion of bottles that contain neither chemical A nor chemical B

Quantity B

34%


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