The gas mileages, in miles per gallon (mpg), of 10 randomly selected cars, both with and without a new gasoline additive, are shown in the following table. with additive Without additive 25.7 24.9 188 27.7 13.0 200 284 13.7 IRS 178 125 284 113 278 23.1 23.1 10.4 9.9 a. Apply the paired r-test to decide, at the 5% significance level, whether the gasoline additive is effective in increasing gas mileage. b. Apply the pooled -test to the sample data to perform the hypothesis test. c. Compare your result in parts (0) and (b). c. Is performing the hypothesis test the way you did in part (b) appropriate or

The gas mileages, in miles per gallon (mpg), of 10 randomly selected cars, both with and without a new gasoline additive, are shown in the following table. with additive Without additive 25.7 24.9 188 27.7 13.0 200 284 13.7 IRS 178 125 284 113 278 23.1 23.1 10.4 9.9 a. Apply the paired r-test to decide, at the 5% significance level, whether the gasoline additive is effective in increasing gas mileage. b. Apply the pooled -test to the sample data to perform the hypothesis test. c. Compare your result in parts (0) and (b). c. Is performing the hypothesis test the way you did in part (b) appropriate or

Structural Analysis

6th Edition

ISBN:9781337630931

Author:KASSIMALI, Aslam.

Publisher:KASSIMALI, Aslam.

Chapter2: Loads On Structures

Section: Chapter Questions

Problem 1P

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The figure shows a top view of an intersection where a traffic accident occurred. Vehicle 1 was traveling eastward while Vehicle 2, traveling northward, ran through a stop sign and crashed into Vehicle 1. The collision was violent. As the vehicles crushed, they became entangled and moved as one, sliding across the intersection and leaving the road. Here are some technical details of the accident: • Vehicle 2 was larger, weighing 50% more than Vehicle 1. • According to a driver following Vehicle 1, it was traveling at the posted speed limit. • Both streets had the same speed limit. It is not known how fast Vehicle 2 was traveling. • The collision caused Vehicle 1 to divert its path by an angle of 0 = 60°, as shown in the figure. • The street was covered with snow and ice, making conditions very slippery. Use the information above to answer the following questions. (I'm expecting the first question to be fairly straightforward, and the second question to be more tricky.) 1. We know that…
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QUESTION 5 A researcher was observing traffic along one lane of a rural highway. During a 1 minute time interval, ten vehicles were observed travelling 65, 64, 71, 66, 58, 72, 69, 66, 55 and 62 mph. Estimate the density (veh/mile). Provide your answer to the nearest tenth.
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