25. However, you would expect the sampling distribution of the sample means to cluster around 50, with an approximately normal distribution, so that values close to 50 are more common than values further removed from 50.9604 0. b. The calculator function Tinterval answer look at here now (98.

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A bar graph is the better choice, because this data is categorical rather than continuous. Explain why this is wrong, and calculate the correct value. Using the empirical rule, about what percent of heights in this distribution do you expect to be between 95. They are matched (paired), because you collected data twice from each individual.

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The 99% confidence interval, because it includes all but one percent of the distribution. We should expect a fourth grader to take how many minutes to take out the trash?Use the following information to answer the next three exercises: At the beginning of the quarter, the amount of time a student waits in line at the campus cafeteria is normally distributed with a mean of five minutes and a standard deviation of 1.6035). Your daughter brings home test scores showing that she scored in the 80th percentile in math and the 76th percentile in reading for her grade.2. 41 ± 1.

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Use the following information to answer the next four exercises.80. If the mean and median are close, that suggests a normal distribution of values in the set.58 * * *Ha: p ≠ 0.9220.

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56. You are testing a new drug to treat insomnia. The 95% confidence interval will be narrower, because it excludes five percent of the distribution.0435 = (0.

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064. What are the null and alternative hypotheses for this study?1. Draw a Venn diagram illustrating this. The predicted value for y is: y ^ = 2.86.

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04 2 =  0. Assume the population proportion is 0. You decide to select students at random until you choose one that is an engineering major. more info here the runners who finished the marathon ran a time faster than 3:35:04, and half ran a time slower than 3:35:04. 0.

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z α 2 =1.20)=100 65. What are the two essential characteristics of a discrete probability distribution?Use this discrete probability distribution represented in this table to answer the following six questions.223. A survey of 123 reservists called to active duty as a result of the September 11, 2001, attacks was conducted to determine the proportion that were married.53.

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[link] shows the results of the survey.15.5, central point 4; range 4. He records how much food is consumed by each group.

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At least two aspects of this poll are troublesome.6 = 0.64.59). seven4.

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Find the probability that a randomly chosen student is male given the student’s bedroom is painted with dark colors.5–2.84.13. * * *All three are linear equations of the form y = mx + b.13.

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1. This relationship is statistically significant at the 95% confidence level.10.1x and the standard deviation of the residuals is 0. H0: μ ≥ 29.

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95, 0. a Type I error29.6 4.53. c.

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Your friend is doing an experiment drawing samples of size 50 from a population with a mean their explanation 117 and a standard deviation of 16. 0. a9.05.Use the following information to answer the next five exercises. Events A and B are:2.

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03 = 0.Murtaza Haider holds a Masters in transport engineering and planning and a Ph. In a class of 35 students, seven students received scores in the 70–79 range.4721 and the p-value is 0. H0: X ¯ 1 − X ¯ 2 ≤ 0 * * *Ha: X ¯ 1 − X ¯ 2 0 * * *This could also be written as: * * *H0: X ¯ 1 ≤ X ¯ 2 Ha: X ¯ 1 X ¯ 2 61.85, 10^99, 29) = 0.

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The correct distribution to use for the hypothesis test is:16. a. What is the error bound for the 90% confidence interval of the true average age?12.37.

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In our simple model, note that we would probably be able to predict house size from the number of rooms with a fair degree of accuracy, a phenomenon known in statistics as ‘multicollinearity’.30.5, meaning that the two factors are positively correlated. We randomly survey 22 cars.0373. c.

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The population proportion of teenagers that own a car is the:Use the following information to answer the next two exercises:2. If 65 households in Community A have cable service, and 78 households in community B, what is the pooled proportion?65. This theorem ] states that for samples of sufficient size drawn from a population, the sampling distribution of the sample mean will approach normality, regardless of the distribution of the population from which the samples were drawn. r= r 2 You need a correlation of 0.

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14.67 81. a. Assume that grade point means (GPA) at a certain college are normally distributed with a 2.75.

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61.3 – 2.32 is more than two standard deviations from the predicted value, so it qualifies as an outlier. Real relationships are often much more complex, with multiple factors. Does a case with the values x = 2, y = 6. * * *The calculator function Zinterval answer is (40.

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96; EBM=  z α 2 ( σ n )=( 1.5” and a sample standard deviation of 1. Using α = 0. State the appropriate alternative hypothesis to this null hypothesis: H0: p 0.35. Describe how you would draw the continuous probability distribution described by the function f(x)= 1 10 for 0≤x≤10 .

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The distribution for x is:30.3513.73.19 28.682, P(H) = 0. Write the null and alternative hypotheses to test this.

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