Chapter 8 Quiz

As a result of complaints from customers about delivery times, the manager at a pizza delivery service is ready to undertake a study to determine the average delivery time. Until now, the manager has believed the delivery time was 25 minutes. What are the null and alternative hypotheses? Ho Hi Get more help- Clear all Check answer TR 0 38) KO here to search

Formulate the indicated conclusion in nontechnical terms. Be sure to address the original claim.   A skeptical paranormal researcher claims that the proportion of Americans that have seen a​ UFO, p, is less than 1 in every ten thousand. Assuming that a hypothesis test of the claim has been conducted and that the conclusion is failure to reject the null​ hypothesis, state the conclusion in nontechnical terms.   A. There is sufficient evidence to support the claim that the true proportion is less than 1 in ten thousand.   B. There is not sufficient evidence to support the claim that the true proportion is less than 1 in ten thousand.   C. There is not sufficient evidence to support the claim that the true proportion is greater than 1 in ten thousand.   D. There is sufficient evidence to support the claim that the true proportion is greater than 1 in ten thousand.

State the null and alternative hypothesis of the following: 1. The IQ of Harvard students is not 175. Identify whether the following uses a one-tailed or two-tailed test: why? a) The average height of students under the program BS Chemical Engineeriny is greter than 165 cm. b) The IQ of Harvard students is not 175. 2.

Formulate the indicated conclusion in nontechnical terms. Be sure to address the original claim. A skeptical paranormal researcher claims that the proportion of Americans that have seen a UFO, p, is less than 2 in every ten thousand. Assuming that a hypothesis test of the claim has been conducted and that the conclusion is failure to reject the null hypothesis, state the conclusion in nontechnical terms. A. There is not sufficient evidence to support the claim that the true proportion is greater than 2 in ten thousand. B. There is not sufficient evidence to support the claim that the true proportion is less than 2 in ten thousand. O c. There is sufficient evidence to support the claim that the true proportion is greater than 2 in ten thousand. O D. There is sufficient evidence to support the claim that the true proportion is less than 2 in ten thousand.

1. For each, state the null and alternative hypothesis and state which is the claim. Use correct use of notation and parameters. a. I claim that the mean age of a calculus student at SBCC is 24 years of age. b. According to Edison National Election Poll, over 50% of female voters voted for Hilary Clinton during the last election.

Identify the null and the alternative hypotheses (NO need to show work in "show work" box). An animal psychologist claims that more than 23 percent of the gazelle population suffers from stress due to human presence. Họ: Select an answer v H;: Select an answer v The original claim = Select an answer v

b. The null and alternative hypotheses would be: Ho: ?v Select an answerv |(please enter a decimal) H1: ? Select an answer (Please enter a decimal) c. The test statistic ?- = (please show your answer to 3 decimal places.) d. The p-value = (Please show your answer to 4 decimal places.)

.  A producer of high quality teas wants to be sure they are filling tea bags with an average weight of 5.5 grams.  Any underfilling or overfilling is undesirable.   The correct set of hypotheses is

Express the null and alternative hypotheses in symbolic form for this claim: the mean weight of male aerobics instructors in a certain city is more than 164 lbs. Note that the mean weight in the sample taken is 169 lbs.H0:μH0:μ H1:μH1:μ

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We want to test if the mean life expectancy of Siberian huskies is at least 14 years of age. State the null and alternative hypotheses and determine the claim. H,: µ 14 (claim) B) H,: µ 14 (claim) H,: p 2 14 (claim) O D) H,: µ < 14

Express the null and alternative hypotheses in symbolic form for this claim: the mean weight of female aerobics instructors in a certain city is equal to 151 lbs. Note that the mean weight in the sample taken is 147 lbs.

State the conclusion. Be sure to address the original claim. A skeptical paranormal researcher claims that the proportion of Americans that have seen a UFO, p, is less than1 in every ten thousand. Assuming that a hypothesis test of the claim has been conducted and that theconclusion is failure to reject the null hypothesis, state the conclusion in nontechnical terms.

.Define each of the following terms relating to estimation and hypothesis testing. (Note: some of them are from chapter 4).a) Unbiased estimatorb) Type I errorT c) Type II error

More than 4.7% of homes have only a landline telephone and no wireless phone. Sample data; a survey by the national center of healthy statistics showed that among 15,944 homes 5.76% had landline phones without wireless phones. express the original claim ina symbolic form. Let the parameter represent a value with respect to homes that have only a landline telephone and no wireless phone identify The null and alternative hypothesis

A and B please