The U.S. Department of Transportation, National Highway Traffic Safety Administration, reported that 77% of all fatally injured automobile drivers were intoxicated. A random sample of 54 records of automobile driver fatalities in a certain county showed that 34 involved an intoxicated driver. Do these data indicate that the population proportion of drive fatalities related to alcohol is less than 77% in Kit Carson County? Use a = 0.10. (a) What is the level of significance? 0.10 State the null and alternate hypotheses. O Hg: p = 0.77; Hạ: p < 0.77 O Hg: p < 0.77; H: p = 0.77 O Ho: p = 0.77; H: p + 0.77 O Ho: p = 0.77; H: p > 0.77 (b) What sampling distribution will you use? The standard normal, since np > 5 and ng > 5. O The standard normal, since np < 5 and ng < 5. O The Student's t, since np < 5 and ng < 5. O The Student's t, since np > 5 and ng > 5. What is the value of the sample test statistic? (Round your answer to two decimal places.)

The U.S. Department of Transportation, National Highway Traffic Safety Administration, reported that 77% of all fatally injured automobile drivers were intoxicated. A random sample of 54 records of automobile driver fatalities in a certain county showed that 34 involved an intoxicated driver. Do these data indicate that the population proportion of drive fatalities related to alcohol is less than 77% in Kit Carson County? Use a = 0.10. (a) What is the level of significance? 0.10 State the null and alternate hypotheses. O Hg: p = 0.77; Hạ: p < 0.77 O Hg: p < 0.77; H: p = 0.77 O Ho: p = 0.77; H: p + 0.77 O Ho: p = 0.77; H: p > 0.77 (b) What sampling distribution will you use? The standard normal, since np > 5 and ng > 5. O The standard normal, since np < 5 and ng < 5. O The Student's t, since np < 5 and ng < 5. O The Student's t, since np > 5 and ng > 5. What is the value of the sample test statistic? (Round your answer to two decimal places.)

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

18th Edition

ISBN:9780079039897

Author:Carter

Publisher:Carter

Chapter10: Statistics

Section10.6: Summarizing Categorical Data

Problem 30PPS

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