#12

Listed below are the measured radiation emissions(in W/kg) corresponding to cellphones: A,B, C,D, E,F, G,H, I,J, and K respectively. The media often present reports about the dangers of cell phone radiation as a cause of cancer. Cell phone radiation must be 1.6W/kg or less. Find the a.mean, b.median, c.midrange, and d. mode for the data. Also complete part e.

1.02 1.16 0.31 0.49 1.39 1.37 1.06 1.54 0.72 0.28 1.48

a. Find the mean.

The mean is _______.

(Round to three decimal places asneeded.)

b. Find the median.

The median is _______.

(Type an integer or adecimal.)

c. Find the midrange.

The midrange is _______.

(Type an integer or adecimal.)

d. Find the mode.

Select the correct choice belowand, ifnecessary, fill in the answer box within your choice.

A. Themode(s) is(are) _______.

(Use a comma to separate answers asneeded.)

B. There is no mode.

e. If you are planning to purchase a cellphone, are any of the measures of center the most importantstatistic? Is there another statistic that is mostrelevant? Ifso, whichone?

A.

The midpoint of the data set is the most important statistic because cell phones that have values close to it have the safest emissions.

B.

The mean of the data set is the most important statistic because cell phones that have values close to it have the safest emissions.

C.

The maximum data value is the most relevantstatistic, because it is closest to the limit of1.6W/kg and that cell phone should be avoided.

D.

The minimum data value is the most relevantstatistic, because it is closest to the limit of1.6W/kg and that cell phone should be purchased.

#13

Below are the jersey numbers of 11 players randomly selected from a football team. Find therange, variance, and standard deviation for the given sample data. What do the results tellus?

5038977459274629625276

Range=_______ (Round to one decimal place asneeded.)

Sample standard deviation=_______ (Round to one decimal place asneeded.)

Sample variance=_______ (Round to one decimal place asneeded.)

What do the results tellus?

A. Jersey numbers on a football team vary much more than expected.

B. Jersey numbers on a football team do not vary as much as expected.

C. The sample standard deviation is too large in comparison to the range.

D. Jersey numbers are nominal data that are just replacements fornames, so the resulting statistics are meaningless.