Area in the chi-square distribution
A left-tail area in the chi-square distribution equals 0.95. For df=10, the table value equals?
18.307
20.483
15.987
3.940
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Discrimination The U.S. Supreme Court considered a case involving the exam for firefighter lieutenant in the city of New Haven, Connecticut. Results from the exam are shown in the table below.
Identify the type 1 error and the type 2 error that correspond to the given hypothesis. THe percentage of adults who have a job is equal to 88%.
The following table shows the results of recent study regarding gender of individuals and their selected field of study.
Justify why the following statement is either true or false: The result of r = - .47 for males indicates alcohol intake causes the grade point average of the typical male student (but not necessarily all male students) to decline.
A data set consists of 247 test scores. Over a long period it has been found that the mean and standard deviation for these scores are known and that the scores are normally distributed. How many scores within this data set should lie within three
A data set consists of 72 test scores. Over a long period it has been found that the mean and standard deviation for these scores are known and that the scores are normally distributed.
A certain grade egg must weigh at least 2 oz. If the weights of eggs are normally distributed with a mean of 1.5 oz and a standard deviation of 0.4 oz, approximately how many eggs in a random sample of 23 dozen would you expect to weigh more than
The lifetimes of light bulbs of a particular type are normally distributed with a mean of 280 hours and a standard deviation of 5 hours. What percentage of the bulbs have lifetimes that lie within 1 standard deviation to either side of the mean?
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