1 The histogram below displays the distribution of 50 ages at death due to traum

Question

1 The histogram below displays the distribution of 50 ages at death due to trauma (accidents and homicides) that were observed in a certain hospital during a week.

For the data described by the above histogram, which of the following is a correct statement about the median?

The median will be bigger than the mean.

The median will be smaller than the mean.

The median and the mean will be about the same.

The median and the range will be about the same.

2. This histogram shows the times, in minutes, required for 25 rats in an animal behavior experiment to successfully navigate a maze.

Which of the following best describes the shape of the histogram?

Symmetric

Left-skewed with no outliers

Right-skewed with no outliers

Left-skewed with a possible outlier

Right-skewed with a possible outlier

Question 3

Select one answer.

This histogram shows the times, in minutes, required for 25 rats in an animal behavior experiment to successfully navigate a maze.

Which of the following is a possible value of the median in this example?

3.3

3.9

4.6

5.5

Question 4

Select one answer.

A survey was conducted to determine the number of servings of vegetables eaten, per day, by adolescents in the United States. The following table shows the results:

What is the modal number of vegetable servings eaten, per day, by adolescents in the United States?

0

1

2

3

More than 3

Question 5

Select one answer

This histogram shows the times, in minutes, required for 25 rats in an animal behavior experiment to successfully navigate a maze.

What percentage of the rats navigated the maze in less than 5.5 minutes?

21%

60%

68%

70%

84%

Question 6

Select one answer.

Here are the number of hours that 9 students spend on the computer on a typical day:

1 6 7 6 8 11 6 12 15

Which of the following represents the mean number of hours spent on the computer?

6.0

7.0

8.0

9.0

Explanation / Answer

1. It is a positive skewed distribution So Mean is greater than Median

Correct answer: Option (B)  The median will be smaller than the mean.

2. Correct answer: Option (D)  Right-skewed with a possible outlier

3. Correct Answer: Option (B) 3.9

4. Correct Answer; Option (C) Modal value = 2

Since highest frequency corresponing value is Model value

5. Correct Answer: Option (E) 84%

The total frequency is less than 5.5 is 21

The percentage is 21/25 = 84%

6. Correct Answer: Option (c) : Mean = 8

Mean = (1 + 6 + 7 + 6 + 8 + 11 + 6 + 12 +15)/9 = 8

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