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Casting aluminum: is there a relationship? Figure 24.13 leaves out the t statistics and their P-values. Based on the information in the output, test the hypothesis that there is no straight-line relationship between thickness and gate velocity. State hypotheses, give a test statistic and its approximate P-value, and state your conclusion.
Suppose an engineer proposes a new model that will weigh 3100 pounds. What could we expect the miles per gallon in the city performance would be?
Test to determine if there is a significant negative relationship between the independent and dependent variable at alpha=.05 and .01.
A box contains four 40-W bulbs, five 6-W bulbs and six 70-W bulbs, if three bulbs are selected without replacement randomly. What is the probabilty that three are 70-W bulbs?
in a random sample of 100 items 17 are defective. if the null hypothesis is that 22 of the items in the population are
A production process that is in control has a mean (m) of 80 and a standard deviation (s) of 10. Determine the upper and the lower control limits for sample sizes of 25
a car insurance company performed a study to determine whether an association exists between age and the frequency of
How many circuits should the company provide to ensure that an attempted call is blocked (because all circuits are busy) with probability less than 0.01?
Describe multiple regression analysis and discuss potential uses for this model
An efficiency study was done on the delivery of first-class mail originating from the four cities listed in the following table. Recorded for each city was the average length of time (in days) that it took a letter to reach a destination in t..
a die is rolled twice. what is the probabilty that the sum of the faces is greater than 7 given thata the first outcome
a waiter believe the distribution of his tips has a model that is slightly skewed to the left with a mean of 9.20 and a
If the probability of getting caught copying someone else's exam is .1, find the probability of not getting caught in three attempts. Assume independence.
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