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# ch10 - Ch.10 10.1 1 SHORTANSWER. 1 54.8 y

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Ch. 10 Testing Claims Regarding a Parameter 10.1 The Language of Hypothesis Testing 1 Determine the Null and Alternative Hypothesis from a Claim SHORT ANSWER. Write the word or phrase that best completes each statement or answers the question. 1) The mean age of bus drivers in Chicago is 54.8 years. Write the existing state and alternative hypotheses. 2) The mean IQ of statistics teachers is greater than 110. Write the existing state and alternative hypotheses. 3) The mean score for all NBA games during a particular season was less than 90 points per game. Write the null and alternative hypotheses. 4) The dean of a major university claims that the mean time for students to earn a Master ʹ s degree is at most 5.5 years. Write the null and alternative hypotheses. 5) A candidate for governor of a particular state claims to be favored by more than half of the voters. Write the null and alternative hypotheses. 6) The buyer of a local hiking club store recommends against buying the new digital altimeters because they vary more than the old altimeters, which had a standard deviation of one yard. Write the null and alternative hypotheses. MULTIPLE CHOICE. Choose the one alternative that best completes the statement or answers the question. 7) A ______________ is a statement or claim regarding a characteristic of one or more populations. A) Hypothesis B) Conclusion C) Conjecture D) Fact 8) The ______________ hypothesis contains the ʺ = ʺ sign. A) Null B) Alternative C) Explanatory D) Conditional 9) A hypothesis test is a ʺ two - tailed ʺ if the alternative hypothesis contains a _______ sign. A) B) + C) < D) > 2 Understand Type I and Type II Errors SHORT ANSWER. Write the word or phrase that best completes each statement or answers the question. 1) The mean age of bus drivers in Chicago is 50.1 years. Identify the type I and type II errors for the hypothesis test of this claim. 2) The mean IQ of statistics teachers is greater than 120. Identify the type I and type II errors for the hypothesis test of this claim. 3) The mean score for all NBA games during a particular season was less than 103 points per game. Identify the type I and type II errors for the hypothesis test of this claim. Page 231

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4) A candidate for governor of a certain state claims to be favored by more than half of the voters. Identify the type I and type II errors for the hypothesis test of this claim. MULTIPLE CHOICE. Choose the one alternative that best completes the statement or answers the question. 5) A local tennis pro - shop strings tennis rackets at the tension (pounds per square inch) requested by the customer. Recently a customer made a claim that the pro - shop consistently strings rackets at lower tensions, on average, than requested. To support this claim, the customer asked the pro shop to string 20 new rackets at 59 psi. Upon receiving the rackets, the customer measured the tension of each and calculated the following summary statistics: x = 58 psi, s = 3.7 psi. In order to conduct the test, the customer selected a significance level of α = .01. Interpret this value.
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ch10 - Ch.10 10.1 1 SHORTANSWER. 1 54.8 y

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