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Discover Card would like to test the hypothesis that the average credit score for an adult in Dallas is different from the average credit score for an adult in Houston. A random sample of 40 adults in Dallas had an average credit score of 699 and a random sample of 35 adults in Houston had an average credit score of 682. It is believed that the population standard deviation for credit scores is 44 and 41 for Dallas and Houston residents, respectively. Discover Card would like to set α = 0.05.
Define Population 1 as Dallas and Population 2 as Houston and use the critical value approach to test this hypothesis.
The random variable x has the following probability distribution.
in a game of chance a number of draws are made with replacement from a box of tickets 500 of these tickets are labeled
Compute the p-value associated with the above sample results, and explain what conclusion can be drawn bases on the p-value?
Airlines must be careful about the total weight of baggage carried by a plane on a commercial flight. Passengers with items exceeding the maximum single-item weight (usually about 70 pounds) must pay a fee
a coin that has been altered so that the probability of ?ipping heads is 0.4 is ?ipped twice. let x be the number of
Which of the following would be the hypothesis for testing the claim that the proportion of students at a large university who smoke is significantly different from 0.15?
suppose a coin having probability 0.7 of coming up heads is tossed three times. let x denote the number of heads that
The number using each entrance is reported below. At the .01 significance level, is there a difference in the use of the four entrances?
produce a histogram showing the probaility distribution probability of outcome on one axis and outcome value on another
Calculate the limits within which the weight of the packets should lie assuming that the machine is not been classified as faulty.
Build a predictive model for number of calories using fat grams. If a pizza has 15 grams of fat, how many calories should it have, using your model?
Formulate a suitable null and alternative hypothesis to test the students' claim that they followed their instructor's recommendation at a 5% level of significance and interpret your findings.
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