The production department has installed a new spray machine to paint automobile doors. as is common with most spray guns, unsightly blemishes often appear because of improper mixture or other problems. a worker counted the number of blemishes on each door. most doors had no blemishes; a few had one; a very few had two, and so on. the average number was 0.5 per door. the distribution of blemishes followed the poisson distribution. out of 10,000 doors painted, about how many would have no blemishes? a. about 6,065b. about 3,935c. about 5,000d. about 500

Abus travels 36 miles in 45 minutes. enter the number of miles the bus travels in 60 minutes at this rate.

On traditional maps, earth is represented in a flat plane, or by euclidean geometry. however, a globe is a more accurate model that comes from elliptical geometry.how does a globe represent the fact that there are no parallel lines in elliptical geometry? the equator is not parallel to any other latitudinal lines. the north and south poles are never connected by a geodesic. the geodesics connecting the north and south poles never intersect. the geodesics connecting the north and south poles intersect at both of the poles.

Two researchers are attempting to create a new psychotherapy protocol that more reduces panic attacks. they believe that they have succeeded and are now in the clinical trial period of their protocol's development. they are working with several cohort groups, some of which have been through the new protocol, while others have done the standard protocol currently recommended. if these researchers are interested in evaluating the difference in the percentage of test subjects who successfully decreased their panic attacks in 2 months on the new protocol versus the percentage of test subjects who successfully decreased their panic attacks in 2 months with the traditional protocol, which of the following statistical tests would be most appropriate? a. analysis of variance (anova) b. correlation c. chi-square test d. paired t-test e. independent t-test