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Solve the problem. 11)The scores on a certain test are normally distributed with a nmean score of 51 and a standard deviation of 2. What is the probability that a sample of 90 students will have a mean score of at least 51.2108? A) 0.1587B) 0.3174C) 0.3413D) 0.8413 12)Suppose that replacement times for.
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Solve the problem. 11)The amount of snowfall falling in a certain mountain range is normally distributed with a mean of 74 inches, and a standard deviation of 12 inches. What is the probability that the mean annual snowfall during 36 randomly picked years will exceed 76.8 inches? A) 0.0026B) 0.0808C) 0.5808D) 0.4192 12)In.
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Directions: Answer the question and solve the problems in the spaces provided, or attach paper. Circle the correct choice for each response set. When allowed , use computer assistance. Provide an appropriate response. 1) Describe the test of homogeneity. What characteristic distinguishes a test of homogeneity from a test of independence ? 2).
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Perform the indicated goodness-of-fit test. 3) In studying the responses to a multiple-choice test question, the following sample data were obtained. At the 0.05 significance level, test the claim that the responses occur with the samr frequency. 4) Among the four northwestern states, Washington has 51% of the total population, Oregon has.
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Directions: Answer the question and solve the problems in the spaces provided, or attach paper. Circle the correct choice for each response set. When allowed , use computer assistance. Provide an appropriate response. 1) Describe the null hypothesis for the test of independence. List the assumptions for the test of independence. What.
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Test the indicated claim about the variances or standard deviations of two populations. assume that both samples are independent simple random samples from populations having normal distributions. 19) A random sample of 16 women resulted in blood pressure levels with a standard deviation of 22.7 mm Hg. A random samples of.
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Find the indicated probability. 11)In a survey of 300 college graduates, 51 % reported that they entered a profession closely related to their college major. If 8 of those survey subjects are randomly selected without replacement for a follow-up survey, what is the probability that 3 of them entered a profession.
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Directions: Answer the questions in the spaces provided, or attach paper. Circle the correct choice for each response set. If required, show calculations in the blank spaces near the problems. Provide an appropriate response. 1)If selecting samples of size n = 10 from a population with a known mean and standard deviation,.
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Provide an appropriate response. 1) Describe the process for testing hypothesis about two mean when the samples are dependent. Compare this process to the methods of hypothesis testing for one mean in Chapter 8. 2) A researcher obtained independent simple random samples of men and women between the ages of 20 and.
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According to Benford's law, a variety of different data sets include numbers with leading (first) digits that follow the distribution shown in the table below. Test for goodness-of-fit with Benford's Law. Leading Digit 1 2 3 4 5 6 7 8 9 Benford's law: distribution of leading digits 30.10% 17.60% 12.50% 9.70% 7.90% 6.70% 5.80% 5.10% 4.60% 5) When working for the Brooklyn District Attorney, investigator Robert Burton analyzed the leading.
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Find the indicated probability. 1)A sample space consist of 146 separate events that are equally likely. What is the probability of each? A)146 B)0C)1D)1/146 2)A bag contains 4 red barbles 3 blue marbles 7 green marbles. If a marble is randomly selected from the bag what is the probability that it is blue? A)1/11.
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Test the indicated claim about the variances or standard deviations of two population. Assume that both samples are independent simple random samples from populations having normal distributions. 19) A researcher obtained independent random samples of men from two different towns. She recorded the weights of the men. The results are summarized below: 20).
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Use the computer display to solve the problem. 13) When testing for a difference between the mean of a treatment group and a placebo group, the computer display blow is obtained. Using a 0.01 significance level, is there sufficient evidence to support the claim that the treatment group (variable 1) comes.
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Provide an appropriate response. 1) Discuss the assumptions for constructing confidence intervals or hypothesis testing for two means from dependent samples. 2) In a random sample of 500 people aged 20-24, 22% were smokers. In a random sample of 450 people aged 25-29, 14% were smokers. A 95% confidence interval for the.
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Test the indicated claim about the variances or standard deviations of two population. Assume that both samples are independent simple random samples from populations having normal distributions. 19) Use the summary statistic below to test claim that the samples come from populations with different variances. Use a significance level of 0.05. 20).
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11)A fololowing is a data of e=water temperature in a heated tube at different time intervals. 114.0113.2116.3113.4115.9114.2113.0114.1 A)0.6 B)1.1 C)-56.1 D)0.8 Use the Empirical rule: 12)The amount of monthly phone bill mean $79 and standard variation of $8.What % of Phone bill between $55 and $103? A)68% B)95% C)99.99% D)99.7% 13. Skewness can be measured by.
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Determine whether the samples are independent or dependent. 9) The effectiveness of a headache medicine is tested by measuring the intensity of a headache in patients before and after drug treatment. The data consist of before and after intensities for each patient. A) Dependent samples B) Independent samples Test the indicated claim about the.
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Directions: Answer the questions in the spaces provided, or attach paper. Circle the correct choice for each response set. If required, show calculations in the blank spaces near the problems. Provide an appropriate response. 1)Helene claimed that the expected value when rolling a fair die was 3.5. Steve said that wasn't possible..
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Perform the indicated goodness-of-fit test. 3) A company manager wishes to test a union leader's claim that absences occur on the different week days with the same frequencies. Test this claim at the 0.05 level of significance if the following sample data have been compiled. 4) Using the data below and a.
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Use the computer display to solve the problem. 13) When testing for a difference between the means of a treatment group and a placebo group, the computer display below is obtained. Using a 0.05 significance level, is there sufficient evidence to support the claim that the treatment group (variable 1) comes.
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Provide an appropriate response 1)The table below provide a frequency distribution for a winner of the devis cup during the period  1977-1994. Which measure of center the mean, or the median or the mode is most approbriate here? Why? Find the mean for the given sample data. 2) The student in Hugh logan's math.
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Directions: Answer the questions in the spaces provided, or attach paper. Circle the correct choice for each response set. If required, show calculations in the blank spaces near the problems. Provide an appropriate response. 1)If selecting samples of size n ≤30 from a population with a known mean and standard deviation, what.
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Provide an appropriate response. 9) The table below summarizes results from an experiment in which subjects were classified as asthmatic and then given a treatment. After the treatment, they were again classified as asthmatic or non-asthmatic. How many subjects appeared to be unaffected by the treatment one way or the other? A).
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Provide an appropriate response. 9) The table summarizes results from an experiment in which subjects were classified as diabetic or non-diabetic and then given a treatment. After the treatment, they were again classified as diabetic or non-diabetic. Which combinations of before treatment/after treatment categories will yield discordant pairs? A) Only diabetic/non-diabetic B) non-diabetic/.
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Solve the problem. 8) A researcher wishes to test the effectiveness of a flu vaccination. 150 people are vaccinated, 180 people are vaccinated with a placebo, and 100 people are not vaccinated. the number in each group who later caught the flu was recorded. The results are shown below. Use a 0.05.
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Directions: Answer the questions in the spaces provided, or attach paper. Circle the correct choice for each response set. If required, show calculations in the blank spaces near the problems. Provide an appropriate response. 1)Anna uses the letter X to represent the possible sequences of heads and tails that can be obtained.
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11)A fololowing is a data of e=water temperature in a heated tube at different time intervals. 114.0113.2116.3113.4115.9114.2113.0114.1 A)0.6 B)1.1 C)-56.1 D)0.8 Use the Empirical rule: 12)The amount of monthly phone bill mean $79 and standard variation of $8.What % of Phone bill between $55 and $103? A)68% B)95% C)99.99% D)99.7% 13. Skewness can be measured by.
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According to Benford's law, a variety of different data sets include numbers with leading (first) digits that follow the distribution shown in the table below. Test for goodness-of-fit with Benford's Law. Leading Digit 1 2 3 4 5 6 7 8 9 Benford's law: distribution of leading digits 30.10% 17.60% 12.50% 9.70% 7.90% 6.70% 5.80% 5.10% 4.60% 5) When working for the Brooklyn District Attorney, investigator  Robert Burton analyzed the leading.
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Find the explained variation for the paired data. 11) The paired data below consists of test scores and hours of preparation for 5 randomly selected students. The equation of the regression line is Find the explained variation. A) 599.2 B) 511.724 C) 87.4757 D) 498.103 Use the computer display to answer the question. 12) A collection.
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Directions: Answer the questions in the spaces provided, or attach paper. Circle the correct choice for each response set. If required, show calculations in the blank spaces near the problems. Provide an appropriate response. 1)If selecting samples of size n >30 from a population with a known mean and standard deviation, what.
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Provide an appropriate response. 1) Define independent and dependent samples and give an example of each. 2) In the context of a hypothesis test for two proportions, which of the following statements about the pooled sample proportion, is/are true? I. It estimates the common value of p1 and p2 under the assumption.
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Solve the problem. 11)The annual precipitation amounts in a certain mountain range are normally distributed with a mean of 91 inches, and a standard deviation of 14 inches. What is the probability that the mean annual precipitation during 49 randomly picked years will be less than 93.8 inches? A) 0.4192B) 0.5808C) 0.9192D).
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Directions: Answer the questions in the spaces provided, or attach paper. Circle the correct choice for each response set. If required, show calculations in the blank spaces near the problems. Provide an appropriate response. 1)A gambler claimed that he had loaded a die so that it would hardly ever come up 1..
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Estimate the standard deviation 11)The maximum value of a distribution is 47.5 and the minimum value is 4.0. A)7.9 B)18.9 C)10.9 D)15.9 Use the empirical rule to solve the problem. 12)At one college, GPA's are normally distributed with a mean of 2.6 and a standard deviation of 0.4. What percentage of students at the.
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Provide an appropriate response. 1) A regression equation is obtained for a set of data. After examining a scatter diagram, the researcher notices a data point that is potentially an influential point. How could she confirm that this data point is indeed an influential point? Given the linear correlation coefficient r and.
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