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An automobile manufacturer claims that their jeep has a 40.5 miles/gallon (MPG) rating. An independent testing firm has been contracted to test the MPG for this jeep. After testing 25 jeeps they found a mean MPG of 40.2 with a standard deviation of 1.5. Is there sufficient evidence at the 0.05 level that the jeeps have an incorrect manufacturer's MPG rating? Assume the population distribution is approximately normal. Step 1 of 5: State the null and alternative hypotheses.

An automobile manufacturer claims that their jeep has a 40.5 miles/gallon (MPG) rating. An independent testing firm has been contracted to test the MPG for this jeep. After testing 25 jeeps they found a mean MPG of 40.2 with a standard deviation of 1.5. Is there sufficient evidence at the 0.05 level that the jeeps have an incorrect manufacturer's MPG rating? Assume the population distribution is approximately normal. Step 1 of 5: State the null and alternative hypotheses.

Glencoe Algebra 1, Student Edition, 9780079039897, 0079039898, 2018
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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State the null hypothesis, the test statistic, one or two tailed?, decision rule for rejecting null hypothesis and make the decision to reject or fail to reject

An automobile manufacturer claims that their jeep has a 40.5 miles/gallon (MPG) rating. An independent testing firm has been contracted to test the MPG for this jeep. After testing 25 jeeps they found a mean MPG of 40.2 with a standard deviation of 1.5. Is there sufficient evidence at the 0.05 level that the jeeps have an incorrect manufacturer's MPG rating? Assume the population distribution is approximately normal. Step 1 of 5: State the null and alternative hypotheses.
Transcribed Image Text:An automobile manufacturer claims that their jeep has a 40.5 miles/gallon (MPG) rating. An independent testing firm has been contracted to test the MPG for this jeep. After testing 25 jeeps they found a mean MPG of 40.2 with a standard deviation of 1.5. Is there sufficient evidence at the 0.05 level that the jeeps have an incorrect manufacturer's MPG rating? Assume the population distribution is approximately normal. Step 1 of 5: State the null and alternative hypotheses.
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