Whether the given variable is discrete or continuous.

Question

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Answer 1

Question

Chapter 8, Problem 8.1E

(a)

To determine

To find: Whether the given variable is discrete or continuous.

(a)

Expert Solution

Answer to Problem 8.1E

The given variable is discrete.

Explanation of Solution

Given:

The variable is “Number of commercials that are shown”.

A variable whose value is determined by counting is referred to as a discrete variable. A continuous variable is one whose value may be determined through measurement.

In this case, the given variable, the number of commercials shown, can be counted and does not take unrounded values. Thus, it can be considered an example of a discrete random variable.

Therefore, the variable is a discrete variable.

(b)

To determine

To find: The given variable is discrete or continuous.

(b)

Expert Solution

Answer to Problem 8.1E

The given variable is continuous.

Explanation of Solution

The given variable is the length which is noted in seconds. The variable's length can take any value within a certain range. The length of the commercial cannot be counted; it takes unrounded values. Thus, it can be considered a continuous random variable.

Therefore, the variable is continuous.

(c)

To determine

To find: The given variable is discrete or continuous.

(c)

Expert Solution

Answer to Problem 8.1E

The given variable is discrete.

Explanation of Solution

In this case, the given variable is the number of accidents recorded. The variable can only have two values that can be counted and do not take unrounded values. Thus, it can be considered an example of a discrete random variable.

Therefore, the variable is discrete.

(d)

To determine

To find: The given variable is discrete or continuous.

(d)

Expert Solution

Answer to Problem 8.1E

The given variable is discrete.

Explanation of Solution

In this case, the given variable is whether the rain is predicted. The variable can only have two values that can be counted and do not take unrounded values. Thus, it can be considered an example of a discrete random variable.

Therefore, the variable is discrete.

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Please help me with this statistics question

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To evaluate the success of a 1-year experimental program designed to increase the mathematical achievement of underprivileged high school seniors, a random sample of participants in the program will be selected and their mathematics scores will be compared with the previous year’s statewide average of 525 for underprivileged seniors. The researchers want to determine whether the experimental program has increased the mean achievement level over the previous year’s statewide average. If alpha=.05, what sample size is needed to have a probability of Type II error of at most .025 if the actual mean is increased to 550? From previous results, sigma=80.

Answer 2

Question

Chapter 8, Problem 8.1E

(a)

To determine

To find: Whether the given variable is discrete or continuous.

(a)

Expert Solution

Answer to Problem 8.1E

The given variable is discrete.

Explanation of Solution

Given:

The variable is “Number of commercials that are shown”.

A variable whose value is determined by counting is referred to as a discrete variable. A continuous variable is one whose value may be determined through measurement.

In this case, the given variable, the number of commercials shown, can be counted and does not take unrounded values. Thus, it can be considered an example of a discrete random variable.

Therefore, the variable is a discrete variable.

(b)

To determine

To find: The given variable is discrete or continuous.

(b)

Expert Solution

Answer to Problem 8.1E

The given variable is continuous.

Explanation of Solution

The given variable is the length which is noted in seconds. The variable's length can take any value within a certain range. The length of the commercial cannot be counted; it takes unrounded values. Thus, it can be considered a continuous random variable.

Therefore, the variable is continuous.

(c)

To determine

To find: The given variable is discrete or continuous.

(c)

Expert Solution

Answer to Problem 8.1E

The given variable is discrete.

Explanation of Solution

In this case, the given variable is the number of accidents recorded. The variable can only have two values that can be counted and do not take unrounded values. Thus, it can be considered an example of a discrete random variable.

Therefore, the variable is discrete.

(d)

To determine

To find: The given variable is discrete or continuous.

(d)

Expert Solution

Answer to Problem 8.1E

The given variable is discrete.

Explanation of Solution

In this case, the given variable is whether the rain is predicted. The variable can only have two values that can be counted and do not take unrounded values. Thus, it can be considered an example of a discrete random variable.

Therefore, the variable is discrete.

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Answer 3

Question

Chapter 8, Problem 8.1E

(a)

To determine

To find: Whether the given variable is discrete or continuous.

(a)

Expert Solution

Answer to Problem 8.1E

The given variable is discrete.

Explanation of Solution

Given:

The variable is “Number of commercials that are shown”.

A variable whose value is determined by counting is referred to as a discrete variable. A continuous variable is one whose value may be determined through measurement.

In this case, the given variable, the number of commercials shown, can be counted and does not take unrounded values. Thus, it can be considered an example of a discrete random variable.

Therefore, the variable is a discrete variable.

(b)

To determine

To find: The given variable is discrete or continuous.

(b)

Expert Solution

Answer to Problem 8.1E

The given variable is continuous.

Explanation of Solution

The given variable is the length which is noted in seconds. The variable's length can take any value within a certain range. The length of the commercial cannot be counted; it takes unrounded values. Thus, it can be considered a continuous random variable.

Therefore, the variable is continuous.

(c)

To determine

To find: The given variable is discrete or continuous.

(c)

Expert Solution

Answer to Problem 8.1E

The given variable is discrete.

Explanation of Solution

In this case, the given variable is the number of accidents recorded. The variable can only have two values that can be counted and do not take unrounded values. Thus, it can be considered an example of a discrete random variable.

Therefore, the variable is discrete.

(d)

To determine

To find: The given variable is discrete or continuous.

(d)

Expert Solution

Answer to Problem 8.1E

The given variable is discrete.

Explanation of Solution

In this case, the given variable is whether the rain is predicted. The variable can only have two values that can be counted and do not take unrounded values. Thus, it can be considered an example of a discrete random variable.

Therefore, the variable is discrete.

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Answer 4

Question

Chapter 8, Problem 8.1E

(a)

To determine

To find: Whether the given variable is discrete or continuous.

(a)

Expert Solution

Answer to Problem 8.1E

The given variable is discrete.

Explanation of Solution

Given:

The variable is “Number of commercials that are shown”.

A variable whose value is determined by counting is referred to as a discrete variable. A continuous variable is one whose value may be determined through measurement.

In this case, the given variable, the number of commercials shown, can be counted and does not take unrounded values. Thus, it can be considered an example of a discrete random variable.

Therefore, the variable is a discrete variable.

(b)

To determine

To find: The given variable is discrete or continuous.

(b)

Expert Solution

Answer to Problem 8.1E

The given variable is continuous.

Explanation of Solution

The given variable is the length which is noted in seconds. The variable's length can take any value within a certain range. The length of the commercial cannot be counted; it takes unrounded values. Thus, it can be considered a continuous random variable.

Therefore, the variable is continuous.

(c)

To determine

To find: The given variable is discrete or continuous.

(c)

Expert Solution

Answer to Problem 8.1E

The given variable is discrete.

Explanation of Solution

In this case, the given variable is the number of accidents recorded. The variable can only have two values that can be counted and do not take unrounded values. Thus, it can be considered an example of a discrete random variable.

Therefore, the variable is discrete.

(d)

To determine

To find: The given variable is discrete or continuous.

(d)

Expert Solution

Answer to Problem 8.1E

The given variable is discrete.

Explanation of Solution

In this case, the given variable is whether the rain is predicted. The variable can only have two values that can be counted and do not take unrounded values. Thus, it can be considered an example of a discrete random variable.

Therefore, the variable is discrete.

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Answer 5

Chapter 8, Problem 8.1E

(a)

To determine

To find: Whether the given variable is discrete or continuous.

(a)

Expert Solution

Answer to Problem 8.1E

The given variable is discrete.

Explanation of Solution

Given:

The variable is “Number of commercials that are shown”.

A variable whose value is determined by counting is referred to as a discrete variable. A continuous variable is one whose value may be determined through measurement.

In this case, the given variable, the number of commercials shown, can be counted and does not take unrounded values. Thus, it can be considered an example of a discrete random variable.

Therefore, the variable is a discrete variable.

(b)

To determine

To find: The given variable is discrete or continuous.

(b)

Expert Solution

Answer to Problem 8.1E

The given variable is continuous.

Explanation of Solution

The given variable is the length which is noted in seconds. The variable's length can take any value within a certain range. The length of the commercial cannot be counted; it takes unrounded values. Thus, it can be considered a continuous random variable.

Therefore, the variable is continuous.

(c)

To determine

To find: The given variable is discrete or continuous.

(c)

Expert Solution

Answer to Problem 8.1E

The given variable is discrete.

Explanation of Solution

In this case, the given variable is the number of accidents recorded. The variable can only have two values that can be counted and do not take unrounded values. Thus, it can be considered an example of a discrete random variable.

Therefore, the variable is discrete.

(d)

To determine

To find: The given variable is discrete or continuous.

(d)

Expert Solution

Answer to Problem 8.1E

The given variable is discrete.

Explanation of Solution

In this case, the given variable is whether the rain is predicted. The variable can only have two values that can be counted and do not take unrounded values. Thus, it can be considered an example of a discrete random variable.

Therefore, the variable is discrete.

Answer 6

Chapter 8, Problem 8.1E

(a)

To determine

To find: Whether the given variable is discrete or continuous.

(a)

Expert Solution

Answer to Problem 8.1E

The given variable is discrete.

Explanation of Solution

Given:

The variable is “Number of commercials that are shown”.

A variable whose value is determined by counting is referred to as a discrete variable. A continuous variable is one whose value may be determined through measurement.

In this case, the given variable, the number of commercials shown, can be counted and does not take unrounded values. Thus, it can be considered an example of a discrete random variable.

Therefore, the variable is a discrete variable.

Answer 7

Chapter 8, Problem 8.1E

(a)

To determine

To find: Whether the given variable is discrete or continuous.

Answer 8

(a)

Expert Solution

Answer to Problem 8.1E

The given variable is discrete.

Answer 9

(a)

Expert Solution

Answer 10

(a)

Expert Solution

Answer 11

Expert Solution

Answer 12

Explanation of Solution

Given:

The variable is “Number of commercials that are shown”.

A variable whose value is determined by counting is referred to as a discrete variable. A continuous variable is one whose value may be determined through measurement.

In this case, the given variable, the number of commercials shown, can be counted and does not take unrounded values. Thus, it can be considered an example of a discrete random variable.

Therefore, the variable is a discrete variable.

Answer 13

(b)

To determine

To find: The given variable is discrete or continuous.

(b)

Expert Solution

Answer to Problem 8.1E

The given variable is continuous.

Explanation of Solution

The given variable is the length which is noted in seconds. The variable's length can take any value within a certain range. The length of the commercial cannot be counted; it takes unrounded values. Thus, it can be considered a continuous random variable.

Therefore, the variable is continuous.

Answer 14

(b)

To determine

To find: The given variable is discrete or continuous.

Answer 15

(b)

Expert Solution

Answer to Problem 8.1E

The given variable is continuous.

Answer 16

(b)

Expert Solution

Answer 17

(b)

Expert Solution

Answer 18

Expert Solution

Answer 19

Explanation of Solution

The given variable is the length which is noted in seconds. The variable's length can take any value within a certain range. The length of the commercial cannot be counted; it takes unrounded values. Thus, it can be considered a continuous random variable.

Therefore, the variable is continuous.

Answer 20

(c)

To determine

To find: The given variable is discrete or continuous.

(c)

Expert Solution

Answer to Problem 8.1E

The given variable is discrete.

Explanation of Solution

In this case, the given variable is the number of accidents recorded. The variable can only have two values that can be counted and do not take unrounded values. Thus, it can be considered an example of a discrete random variable.

Therefore, the variable is discrete.

Answer 21

(c)

To determine

To find: The given variable is discrete or continuous.

Answer 22

(c)

Expert Solution

Answer to Problem 8.1E

The given variable is discrete.

Answer 23

(c)

Expert Solution

Answer 24

(c)

Expert Solution

Answer 25

Expert Solution

Answer 26

Explanation of Solution

In this case, the given variable is the number of accidents recorded. The variable can only have two values that can be counted and do not take unrounded values. Thus, it can be considered an example of a discrete random variable.

Therefore, the variable is discrete.

Answer 27

(d)

To determine

To find: The given variable is discrete or continuous.

(d)

Expert Solution

Answer to Problem 8.1E

The given variable is discrete.

Explanation of Solution

In this case, the given variable is whether the rain is predicted. The variable can only have two values that can be counted and do not take unrounded values. Thus, it can be considered an example of a discrete random variable.

Therefore, the variable is discrete.

Answer 28

(d)

To determine

To find: The given variable is discrete or continuous.

Answer 29

(d)

Expert Solution

Answer to Problem 8.1E

The given variable is discrete.

Answer 30

(d)

Expert Solution

Answer 31

(d)

Expert Solution

Answer 32

Expert Solution

Answer 33

Explanation of Solution

In this case, the given variable is whether the rain is predicted. The variable can only have two values that can be counted and do not take unrounded values. Thus, it can be considered an example of a discrete random variable.

Therefore, the variable is discrete.