展开全部

题目列表

题目内容
Which of the following best describes the function of the highlighted sentence?
It can be inferred from the passage that the author would probably agree with which of the following claims about animals and temperature change?
Whereas water on Mars could plausibly have been delivered by repeated comet impacts in the geologically recent past, the ice on smaller bodies is more difficuIt to attribute to _______________ source.
The passage suggests that by the end of the nineteenth century,many publishers of newspapers in the United States
The passage implies that the shift in "focus" brought about a change in the
$$n \gt 0$$

Quantity A

$$\frac{n+1}{n+2}$$

Quantity B

$$\frac{1}{2}$$


$$R_1$$: -3, -2, -1

$$R_2$$: 1, 2, 3

$$R_3$$: -3, -2, -1, 1, 2, 3

The standard deviations of the numbers in the lists $$R_1$$, $$R_2$$, and $$R_3$$ are $$s_1$$, $$s_2$$, and $$s_3$$, respectively. Which of the following is true?
The standard deviation of the numbers in list K is a number between 12 and 15 inclusive. If a new list is formed by multiplying each number in list K by 3 which of the following values could be the standard deviation of the numbers in the new list?

Indicate all such values.
$$R_1$$: 13.2, 14.2, 15.2, 16.2, 17.2

$$R_2$$: (13)(0.2), (14)(0.2), (15)(0.2), (16)(0.2), (17)(0.2)

$$R_3: \frac{13}{0.2}, \frac{14}{0.2}, \frac{15}{0.2}, \frac{16}{0.2}, \frac{17}{0.2}$$

If $$s_1, s_2$$,and $$s_3$$ are the standard deviations of lists $$R_1, R_2$$,and $$R_3$$ respectively,which of the following shows the standard deviations in order from least to greatest?
The standard deviation of n numbers $$x_{1}$$, $$x_{2}$$, $$x_{3}$$,......, $$x_{n}$$, with mean $$\overline{x}$$ is equal to $$\sqrt{\frac{s}{n}}$$, where S is the sum of the squared differences $$(x_{i} - \overline{x})^{2}$$ for 1 ≤ i ≤ n.

List K consists of 5 different numbers. List L consists of 5 numbers and is formed by multiplying each number in K by 2. The standard deviation of the numbers in K is x and the standard deviation of the numbers in L is 2y.

Quantity A

x

Quantity B

y


A sample of 18 integers has an average (arithmetic mean) equal to m and standard deviation equal to s. Two of the integers are equal to m.

Quantity A

The standard deviation of the 16 integers that are not equal to m

Quantity B

s


List S: 21, 22, 23, 25, 27, 32

List T: 221, 222, 223, 225, 227, 232

The standard deviation of the numbers in list S is x. In terms of x, what is the standard deviation of the numbers in list T?
List K: 7, 11, 15, 19, 23

The standard deviation of the numbers in list K is equal to the standard deviation of the numbers in which of the following lists?

Indicate all such lists.


The table above shows scores received by 5 people on each of 4 tests. For these 5 people, which person`s scores have the greatest standard deviation?
Which of the following lists of numbers has the greatest standard deviation?

Quantity A

The standard deviation of the five numbers 10, 30, 50, 70, and 90

Quantity B

The standard deviation of the five numbers 10, 45, 50, 55, and 90


List R: 2, 4, 7, 10, 12

List T: 2, 5, 7, 9, 12

Quantity A

The standard deviation of the numbers in list R

Quantity B

The standard deviation of the numbers in list T


Set A: {20, 30, 40, 50, 60}

Set B: {20, 35, 40, 45, 60}

Quantity A

The standard deviation of the 5 numbers in set A

Quantity B

The standard deviation of the 5 numbers in set B


For which of the following lists is the standard deviation of the numbers in that list greater than the standard deviation of the numbers 0, 10, 20, 30, and 40?

共收录:

25000 +道题目

198本备考书籍

最新提问