Radon: the problem no one wants to face" is the title of an article appearing in consumer reports. radon is a gas emitted from the ground that can collect in houses and buildings. at certain levels it can cause lung cancer. radon concentrations are measured in picocuries per liter (pci/l). a radon level of 4 pci/l is considered "acceptable." radon levels in a house vary from week to week. in one house, a sample of 8 weeks had the following readings for radon level (in pci/l).

1.9 2.3 5.7 5.2 1.9 8.8 3.9 7.3
(a) find the mean, median, and mode. (enter your answers to 2 decimal places.)
mean
median
mode
(b) find the sample standard deviation, coefficient of variation, and range. (enter your answers to 2 decimal places.)
s
cv %
range

a) =4.63 md=4.55 mo= 1.9 b) Sample Standard Deviation≈ 2.58 Coefficient of Variation=55.72% Sample Range=6.9

Step-by-step explanation:

a)

Mean

For the Median, we have to order the entries. So, ordering it goes:

1.9 1.9 2.3 3.9 5.2 5.7 7.3 8.8

Since we have even entries

mode

The mode for this data 1.9 1.9 2.3 3.9 5.2 5.7 7.3 8.8 is 1.9

b)

Sample Standard Deviation

Here it is the formula to calculate it:

Coefficient of Variation

CV is the quocient between sample Standard deviation over Mean and it is used to make comparisons.

Range

The difference between the highest and the lowest value of this sample

8.8-1.9=6.9

9 sandwiches per hour

step-by-step explanation:

when we have a rate, we want a 1 in the denominator

27/3 = 9

27 sandwiches/ 3 hours = 9 sandwiches/hour