Using traditional methods it takes 10.6 hours to receive a basic flying license. A new license training method using Computer Aided Instruction (CAI) has been proposed.A researcher used the technique on 17 students and observed that they had a mean of 10.4 hours with a variance of 2.25. Is there evidence at the 0.025 level that thetechnique reduces the training time? Assume the population distribution is approximately normal.Step 1 of 5: State the null and alternative hypotheses.

Answered: Image /qna-images/answer/ab79e7f2-90bf-4534-9994-ab0822d63688.jpg

Answered: Using traditional methods it takes 10.6…

ENGR.ECONOMIC ANALYSIS

14th Edition

ISBN:9780190931919

Author:NEWNAN

Publisher:NEWNAN

Chapter1: Making Economics Decisions

Section: Chapter Questions

Problem 1QTC

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Consider the mean cost of getting a four-year college degree. The middle interval which captures 95% of mean costs from samples of n = 75 graduates is (x̅₁, x̅₂) = $60,142 $68,446 25 What is the population mean cost of getting a college degree? a $62,384 b $63,014 c $63,651 d $64,294
SCENARIO 3 Two samples each of size 25 are taken from independent populations assumed to be normally distributed with equal variances. The first sample has a mean of 35.5 and a standard deviation of 3.0 while the second sample has a mean of 33.0 and a standard deviation of 4.0. Referring to Scenario 3. the pooled (i.e., combined) variance is ________
Question 1 It is necessarý for an automobile producer to test the hypothesis that the mean number of miles per gallon achieved by its cars is 28 against the alternative hypothesis that it is not 28. The standard deviation of the number of miles per gallon achieved by the company's cars is 6. Suppose that the mean number of miles per gallon for a sample of 100 cars is 26.2. On the basis of this result, should the company reject the hypothesis that the population mean is 28? Why, or why not? Use a=0.05.
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