It is advertised that the average braking distance for a small car traveling at 65 miles per hour equals 120 feet. A transportation researcher wants to determine if the statement made in the advertisement is false. She randomly test drives 34 small cars at 65 miles per hour and records the braking distance. The sample average braking distance is computed as 115 feet. Assume that the population standard deviation is 20 feet. (You may find it useful to reference the appropriate table: ztable or ttable) a. State the null and the alternative hypotheses for the test. O Hgs - 120: Wa: - 120 O Noi 120; Ha < 120 O Hgt s 120; Bat > 120 b. Calculate the value of the test statistic and the pvalue. (Negative value should be indicated by a minus sign. Round final answer to 2 decimal places.) Test statistic

It is advertised that the average braking distance for a small car traveling at 65 miles per hour equals 120 feet. A transportation researcher wants to determine if the statement made in the advertisement is false. She randomly test drives 34 small cars at 65 miles per hour and records the braking distance. The sample average braking distance is computed as 115 feet. Assume that the population standard deviation is 20 feet. (You may find it useful to reference the appropriate table: ztable or ttable) a. State the null and the alternative hypotheses for the test. O Hgs - 120: Wa: - 120 O Noi 120; Ha < 120 O Hgt s 120; Bat > 120 b. Calculate the value of the test statistic and the pvalue. (Negative value should be indicated by a minus sign. Round final answer to 2 decimal places.) Test statistic

Glencoe Algebra 1, Student Edition, 9780079039897, 0079039898, 2018

18th Edition

ISBN:9780079039897

Author:Carter

Publisher:Carter

Chapter10: Statistics

Section: Chapter Questions

Problem 22SGR

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