davenport stat500 week 2 quiz ch 3

Dave is a college student contemplating a
possible career option. One factor that will influence his decision is the
amount of money he is likely to make. He decides to look up the average
salary of graduates in that profession. Which information would be more
useful to him, the mean salary or the median salary. Explain.

Find the mean for the given sample. Unless
indicated otherwise, round your answer to
one more decimal place than is present in the original data values.

Last year, nine employees of an electronics company retired. Their ages at
retirement are
listed below. Find the mean retirement age.

52 50 60 68 64 50 64 58 50.

Last year, nine employees of an electronics
company retired. Their ages at retirement
are listed below. Find the median retirement age.

52 50 60 68 64 50 64 58 50.

Find the mode for the given sample data. Last
year, nine employees of an electronics company retired. Their ages at
retirement are listed below:

52 50 60 68 64 50 64 58 50.

Find the variance for the given data. Round your
answer to one more decimal place than
the original data. Jeanne is currently taking college zoology. The instructor
often gives quizzes. On the past five quizzes, Jeanned got the following
scores:

18 16 3 1 20

Use the empirical rule to solve the problem.

At one college, GPA’s are normally distributed with a mean of 2.6 and a
standard deviation of 0.4. What percentage of students at the college
level have a GPA between 2.2 and 3?

Use the empirical rule to solve the problem.

The systolic blood pressure of 18-year-old women is normally distributed with
a mean of 120 mmHg and a standard deviation of 12 mmHg. What percentage of
18-year-old women have a systolic blood pressure between 96mmHg and 144mmHg?

Find the number of standard deviations from the
mean. Round your answer to the nearast two decmial places.

The annual snowfall in a town has a mean of 31 inches and a standard
deviation of 11 inches. Last year there were 66 inches of snow. How many
standard deviations from the means is that?

Find the z-score corresponding to the given value
and use the z-score to determine whether the value is unusual. Consider a
score to be unusual it its z-score is less than -2.00 or greater than 2.00.
Round the z-score to the nearest tenth, if necessary.

A weight of 99 pounds among a population having a mean weight of 162 pounds
and a standard deviation of 24.3 pounds.

Determine which score corresponds to the higher
relative position.

Which score has the highest relative position:
a) a score of 51.5 on a test for which the mean x = 47 and s = 9,
b) a score of 5.9 on test for which the mean x = 4.2 and s = 1.2, or
c) a score of 460.8 on a test for which the mean x = 444 and s = 42?

Suppose that all values in a data set are
converted to z-scores. Which of the following statements below is true?

Find the percentile for the data value = 6.

Data set: 4 12 9 6 4 4 12 6 4 12 2 12 15 5 9 4 12 9 6 12