Using traditional methods it takes 94 hours to receive an advanced driving license. A new training technique using Computer Aided Instruction (CAI) has been proposed. Aresearcher used the technique on 120 students and observed that they had a mean of 92 hours. Assume the population standard deviation is known to be 8. Is thereevidence at the 0.05 level that the technique reduces the training time?Step 4 of 6 Find the P-value of the test statistic. Round your answer to four decimal places.

Given information:- μ0 (hypothesized mean) = 94- x̄ (sample mean) = 92- n (sample size) = 120- σ…

Answered: Using traditional methods it takes 94…

ENGR.ECONOMIC ANALYSIS

14th Edition

ISBN:9780190931919

Author:NEWNAN

Publisher:NEWNAN

Chapter1: Making Economics Decisions

Section: Chapter Questions

Problem 1QTC

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Bob Nale is the owner of Nale’s Quick Fill. Bob would like to estimate the mean number of gallons of gasoline sold to his customers. Assume the number of gallons sold follows the normal distribution with a population standard deviation of 1.80 gallons. From his records, he selects a random sample of 80 sales and finds the mean number of gallons sold is 6.90. What is the point estimate of the population mean? (Round your answer to 2 decimal places.) Develop a 95% confidence interval for the population mean. (Use z Distribution Table.) (Round your answers to 2 decimal places.)
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