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Study Resources (Statistics)

10) A medical researcher is interested in determining if there is a relationship between adults over 50 who exercise regularly and low, moderate, and high blood pressure. A random sample of 236 adults over 50 is selected and the results are given below. Test the claim that regular exercise and low, moderate,.
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MULTIPLE CHOICE.  Choose the one alternative that best completes the statement or answers the question. Solve the problem. 1)The amount of television viewed by today's youth is of primary concern to Parents Against Watching Television (PAWT). 330 parents of elementary school-aged children were asked to estimate the number of hours per week.
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Provide an appropriate response. 1) A medical researcher wishes to try three different techniques to lower cholesterol levels of patients with high cholesterol levels. The subjects are randomly selected and assigned to one of three groups. Group 1 is given medication, Group 2 is given an exercise program, and Group 3.
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1) A minor league baseball team posted the following data for its 16 best players. Test the significance of the individual predictor variables at α = 0.05. A) Both explanatory variables have a significant linear relationship with the response variable. B) Consider removing the variable ?at bats? because it is not a good.
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11) Twelve nursing students are set to graduate and the registration clerk at the nursing school wonders if there is a correlation between a student?s age, their GPA and their state board score. She collects data about the 12 students. The data is given below. Test the null hypothesis that all coefficients.
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Answer the question True or False. 22)A variable is a characteristic or property of a population. A)TrueB) False 23)Measurement is the process of assigning numbers to variables of individual population units. A)TrueB) False 24)A census is feasible when the population of interest is  small. A) TrueB) False 25)The process of using information from a sample to.
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Provide an appropriate response. 3) The table below lists the amounts (in dollars) spent on clothing and entertainment over the last year by 10 adults selected at random. Find the critical values to test the hypothesis of no correlation between spending in these two areas. Use α = 0.05. A) ± 0.648.
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MULTIPLE CHOICE. Choose the one alternative that best completes the statement or answers the question. Solve the problem. 1) Which of the following assignments of probabilities to the sample points A, B, and C is valid if A, B, and C are the only sample points in the experiment? A) P(A) = 0, P(B).
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SHORT ANSWER.  Write the word or phrase that best completes each statement or answers the question. Solve the problem. 1)Define statistical thinking. 2)What is meant by selection bias? MULTIPLE CHOICE.  Choose the one alternative that best completes the statement or answers the question. 3)Which type of problem has occurred when inaccuracies exist in the values.
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Provide an appropriate response. 1) Use the Wilcoxon matched-pairs signed-ranks test to test the given hypothesis at the α = 0.05 level of significance. The dependent samples were obtained randomly. Hypotheses: H0: MD = 0 versus H1: MD ≠ 0 with n = 45, T+ = 189, and T- = 846 2) Use.
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Solve the problem. 1)Which of the following is not the job of a statistician? A) implementing new procedures based on the results of a study B) determining what information is relevant in a given problem C)collecting numerical information in the form of data D)determining whether the conclusions drawn from a study are to be.
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MULTIPLE CHOICE.  Choose the one alternative that best completes the statement or answers the question. Solve the problem. 1)A recent report stated "Based on a sample of 180 truck drivers, there is evidence to indicate that, on average, independent truck drivers earn more than company-hired truck drivers." Does this statement describe descriptive.
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Provide an appropriate response. 1) The nonparametric test used in place of the one-way ANOVA is the . A) Kruskal-Wallis test B) Mann-Whitney test C) Spearman?s rank-correlation test D) Runs Test 2) The decision to reject H0 using the Kruskal-Wallis test occurs when . A) H is too large B) H is too small C).
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7) How does a confidence interval differ from a prediction interval? A) Confidence intervals are used to measure the accuracy of the mean response of all the individuals in the population, while a prediction interval is used to measure the accuracy of a single individual?s predicted value. B) Confidence intervals are used to measure.
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MULTIPLE CHOICE.  Choose the one alternative that best completes the statement or answers the question. Solve the problem. 1)Parking at a university has become a problem. University administrators are interested in determining the average time it takes a student to find a parking spot. An administrator inconspicuously followed 240  students and recorded.
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MULTIPLE CHOICE.  Choose the one alternative that best completes the statement or answers the question. Solve the problem. 1)The amount of television viewed by today's youth is of primary concern to Parents Against Watching Television (PAWT). 250 parents of elementary school-aged children were asked to estimate the number of hours per week.
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10) Can happiness be predicted? A researcher is investigating whether job satisfaction, income, and health could be good predictors of happiness. She selects a random sample of working adults and obtains the following information for each person. Each person is asked to rate their happiness and their job satisfaction on a.
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SHORT ANSWER. Write the word or phrase that best completes each statement or answers the question. Solve the problem. 1) The accompanying Venn diagram describes the sample space of a particular experiment and events A and B. Suppose the sample points are equally likely. Find P(A) and P(B). 2) The accompanying Venn diagram describes.
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MULTIPLE CHOICE. Choose the one alternative that best completes the statement or answers the question. Solve the problem. 1) Probabilities of different types of vehicle-to-vehicle accidents are shown below: Find the probability that an accident involves a car. A) 0.84 B) 0.66 C) 0.18 D) 0.16 2) A hospital reports that two patients have been.
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Provide an appropriate response. 1) ___________________ statistical processes are often called distribution free procedures. A) Nonparametric B) Parametric C) Free form D) Approximate 2) Which of the below is an advantage of nonparametric statistical procedures? A) The computations are easy. B) The results are less powerful. C) They require a large sample size. D) Fewer.
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17) An industrial psychologist is investigating the effects of work environment on employee attitudes. A group of 20 recently hired sales trainees were randomly assigned to one of four different ?home rooms? - five trainees per room. Each room is identical except for wall color. The four colors used were.
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