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The president of a company that manufactures air conditioners is considering switching his supplier of condensers. SupplierA,the current producer of condensers for the manufacturer, prices its product 5% higher than supplier B does. Because the president wants to maintain his company's reputation for quality, he wants to be sure that supplier B's condensers last at least as long as supplier A's condensers.
After a careful analysis, the president decided to retain supplierAif there is sufficient statistical evidence that supplier A's condensers last longer, on average than supplierB'scondensers. In an experiment, 15 randomly-selected midsize cars were equipped using type-A condensers while another 15 randomly-selected midsize cars were equipped with type-B condensers. The number of kilometers (in thousands) driven by each car before the condenser broke down is displayed in the table below.
SupplierA SupplierB156 109146 7593 131152 13180 129111 147107 78118 124115 86125 127108 11197 146142 114160 136102 98
Carry out a hypothesis test, at 5% significance level, to determine whether the president should retain Supplier A.
Provide examples of a different data collection method and a data collection instrument used in managerial research. Why is it important to ensure that these data collection methods and instruments are both reliable and valid?
When studying the simultaneous responses to two categorical questions, we should set up a:
the life span of a battery is normally distributed with a mean of 2000 hours and a standard deviation of 30 hours.a
Since Richard has not attended the class recently, he doesn't know any of the answers. Assuming that Richard guesses on all 9 questions, find the probability that he will answer all questions incorrectly?
The error between the sample mean and the population mean for a sample of n = 16 is 5 points and the error between a sample men and population mean for a sample of n = 100 is 2 points. Explain the difference in the standard error??
suppose that pa 0.4 and pacapb 0.12a find pbab are the events a and b mutually exclusive?if pb 0.3 are events a and
If probability the first truck is available is= .75, probability the second truck is available is= .50, and probability both are available is= .30, determine the probability which neither truck is available?
the data set toxemia contains information for a sample of 100 infants born in two hospitals in boston. indicators of a
the past many years, the average number of employees absent on Friday is 2.6. Given this data she asks you to compute the probability that more than 5 will be sick on a given Friday.
A random sample of 20 patients in a weight loss clinical trial lost an average of 25 pounds over an 8 week period. The sample standard deviation is 10.
Averaging 204 pins with a standard deviation of 24.9, can one conclude at a level of significance of .01 that the new ball has improved his game?
Consider a large population of families with three children each. If the genders of children in any family are independent of one another, the number of male children in any family will have a binomial distribution based on three trials.
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