Analysts of traffic control systems believe that the average speed of heavy vehicles on highways has decreased after passing an ordinance of high penalty to regulate over speeding. The average speed for a random selection of 36 trucks was found to be 55 mph with a standard deviation of 5 mph. The speed before the ordinance was passed was an average of up to 57 mph on these highways. Which of the following statements is true with regard to the sample data providing sufficient evidence to support the analysts' belief at the 5% significance level? Group of answer choices The test statistic falls in the rejection region (-∞,-1.960]. The test statistic falls in the rejection region (-∞,-1.645]. The test statistic falls in the rejection region [1.645, ∞). The test statistic falls in the rejection region (-∞,-1.645] U [1.645, ∞). The test statistic falls in the rejection region (-∞,-1.960] U [1.960, ∞).
Analysts of traffic control systems believe that the average speed of heavy vehicles on highways has decreased after passing an ordinance of high penalty to regulate over speeding. The average speed for a random selection of 36 trucks was found to be 55 mph with a standard deviation of 5 mph. The speed before the ordinance was passed was an average of up to 57 mph on these highways. Which of the following statements is true with regard to the sample data providing sufficient evidence to support the analysts' belief at the 5% significance level? Group of answer choices The test statistic falls in the rejection region (-∞,-1.960]. The test statistic falls in the rejection region (-∞,-1.645]. The test statistic falls in the rejection region [1.645, ∞). The test statistic falls in the rejection region (-∞,-1.645] U [1.645, ∞). The test statistic falls in the rejection region (-∞,-1.960] U [1.960, ∞).
Glencoe Algebra 1, Student Edition, 9780079039897, 0079039898, 2018
18th Edition
ISBN:9780079039897
Author:Carter
Publisher:Carter
Chapter10: Statistics
Section10.4: Distributions Of Data
Problem 19PFA
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Question
Analysts of traffic control systems believe that the average speed of heavy vehicles on highways has decreased after passing an ordinance of high penalty to regulate over speeding. The average speed for a random selection of 36 trucks was found to be 55 mph with a standard deviation of 5 mph. The speed before the ordinance was passed was an average of up to 57 mph on these highways.
Which of the following statements is true with regard to the sample data providing sufficient evidence to support the analysts' belief at the 5% significance level?
Which of the following statements is true with regard to the sample data providing sufficient evidence to support the analysts' belief at the 5% significance level?
Group of answer choices
The test statistic falls in the rejection region (-∞,-1.960].
The test statistic falls in the rejection region (-∞,-1.645].
The test statistic falls in the rejection region [1.645, ∞).
The test statistic falls in the rejection region (-∞,-1.645] U [1.645, ∞).
The test statistic falls in the rejection region (-∞,-1.960] U [1.960, ∞).
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