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A manufacturer of electronics kits has found that the mean time required for novices to assemble its new circuit tester is 3 hours, with a standard deviation of 0.20 hours. A consultant has developed a new instructional booklet that he claims will reduce the time an inexperienced kit builder will need to assemble the device. In a test of the effectiveness of the new booklet, 15 novices require a mean of 2.90 hours to complete thejob. Assuming the population of times is normally distributed, and using the 0.05 level of significance, should we conclude that the new booklet is effective?
Construct a 88% confidence interval for the mean femininity score of all male hotel managers and estimate the percent change amongst lactating mothers to within ± 0.5% with 99% confidence. How large a sample of nursing mothers do you need?
Research Scenario in which z-score is valuable
Let X1, X2 be two random variables with joint pdf f(x1, x2)=4x1x2, 0
Confidence interval for the true proportion of the stores that violate the standard were not met. Determine the number of stores that must be sampled in order to estimate the true proportion to within 0.05 with 95% confidence using the large-sa..
Find the probability
Write a report on simple data analysis and comparison.
Graphical Solutions in Linear Programming have limited number of decision variables. What is the maximum number of decision variables used in graphical solutions?
How do small companies compare to the major competitor and Has satisfaction with the manufacturer changed since the change in company ownership?
The mean weight of all the mice in the shipment
Relationship between the average Wonderlic score and graduation rate?
1 the test averages for 40 students are listed below. use 8 classes not bins to construct a frequency distribution
What is the probability that a customer will receive his meal in less than 10 minutes?
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