Author: Anonymous

Find the indicated probability. Assume that the weights of quarters are normally distributed with a mean of 5.67 g and a standard deviation 0.070 g. A vending machine will only accept coins weighing between 5.48 g and 5.82 g. What percentage of legal quarters will be rejected?

Original claim:  The mean pulse rate (in beats per minute) of a certain group of adult males is 73 bpm. The hypothesis test results in a p-value of 0.0096. Assume a significance level of α = 0.01. State a conclusion about the null hypothesis.  

X ~ N(4, 5) Find the maximum of x in the bottom quartile. (Round to 2 decimal places as needed.)  

Identify which of the 5 sampling techniques is being used. Five math classes are randomly selected out of 20 and ALL of the students from those classes are surveyed.

Find the mean of the given probability distribution. x P(x) 0 0.20 1 0.14 2 0.29 3 0.18 4 0.19  

Find the z-score.The mean height of a basketball team is 6.3 feet with a standard deviation of 0.2 feet. The team’s center is 6.9 feet tall. Find the center’s z-score. Is his score unusual? (Consider unusual values are less than a z score of -2 or greater than a z score of 2.)

Sample data set: 10        22        12        18        11        27        10        15The standard deviation of the above data set is (round appropriately):

Sample data set:10        22        12        18        11        27        10        15The mean of the above data set is:

Examine the statement and tell what misuse of statistics may be involved:In a study of cold symptoms, every one of the subjects with a cold was found to be improved 2 weeks after taking ginger pills.  The study concludes that ginger pills cure colds.

Use the following table of algebra and calculus scores. Algebra (x)   36       46      45      43      32      30      22      47    Calculus (y)     77   92   87   81   71   63   53   88   If a hypothesis test was performed on the above data set,  what is the p-value (step 4 of the Linear Regression hypothesis test)?