Which of the following terms describes the amount of radiation that exits through different tissues in the body?

An acceptable radiograph is taken using 12 mAs at 80 kVp at a distance of 40 inches.  In order to maintain density of the image at a distance of 60 inches, what new mAs should be used?

Choose the two (2) photographic factors that govern the appearance of a radiographic image:

Assuming that all other factors remain constant, which of the following changes will result in a decrease in patient dose? 

Suppose that 1 =.5, 2= .2, n1 = 20, and n2 = 30.  What is the P-value for the hypothesis H0: p1  p2 versus Ha: p1

A study was done to determine if students learn better in an online basic statistics class versus a traditional face-to-face (f2f) course. A random sample of 12 students in an online course and 15 students in an f2f course was taken. The scores (out of 100) on the final exam of both groups are shown below. Online class 60 100 95 80 67 88 76 86 90 95 91 100       f2f 55 70 90 81 67 89 34 76 94 88 100 67 93 76 89 Using a significance level of α = .05, the null hypothesis would be rejected.

A newspaper is conducting a statewide survey concerning the race for governor. The newspaper will take a simple random sample of n registered voters and determine X = the number of voters that will vote for the Democratic candidate. Is there evidence that a clear majority of the population will vote for the Democratic candidate? To answer this, they will test the hypotheses H0: p = 0.50 versus Ha: p > 0.50.  If n = 120 and r = 64, what is the P-value for this hypothesis test?

(41-42) Find the P-value for each situation. Test statistic 

Find the  and .

Find the .