Answer the following questions using the separate rates X1,..., X20 and Y1,..., Y20 shown inFigure 1.(a) Carry out the calculations for a test of the hypotheses that the mean U.S. mortality rateOn remained the same or increased from 2005 to 2015 against the alternative that themean mortality rate decreased. State the hypotheses, test statistic, rejection region, andp-value. Do not interpret the conclusion of the test.(b) Compute a 99% confidence interval for the change in mean heart rate mortality. Do notinterpret the interval. Below, Figure 1 shows the distributions of mortality rates for 20 randomly selected U.S. statesin 2005 and 2015, as well as a stacked bar chart of the rates for individual states. In the bar chart,the height of the blue bar shows the rate in 2015, and the height of the red bar shows the rate in2005.200520150.020 -0.015-0.010-0.005 -0.000 -200250200100Heart disease mortality rate100150150250400 -300 -Year2005200 -2015100-StateFigure 1: Top, histograms of age-adjusted heart disease mortality rates (deaths per 100,000) foreach of 20 randomly selected states in 2005 and in 2015; bottom, stacked bar chart of rates for eachstate by year.Heart disease mortality ratedensity

Answered: Image /qna-images/answer/e07a771c-926c-4136-9da7-e8c32625f2b6.jpg

Answered: Below, Figure 1 shows the distributions…

MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

Section: Chapter Questions

Problem 1P

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The average number of cavities that thirty-year-old Americans have had in their lifetimes is 7. Do twenty-year-olds have a different number of cavities? The data show the results of a survey of 11 twenty-year-olds who were asked how many cavities they have had. Assume that the distribution of the population is normal. 4, 8, 5, 7, 7, 4, 8, 5, 4, 4, 6 H0=? H1=? The test statistic = ? (please show your answer to 4 decimal places.) The p-value = ? (Please show your answer to 5 decimal places.)
From these values, construct a grouped cumulative frequency distribution. 100 91 65 96 102 105 100 125 115 102 100 71 85 122 90 108 101 105 100 89 114 109 111 135
You are given the following set of observations: 98, 77, 26, 33, 88, 90, 79, 81. What would be the mean for this distribution?
The table below shows the amount, in inches, of annual rainfall in a sample of towns. Rainfall Frequency (inches) 2.95- 6. 4.97 4.97- 7 6.99 6.99- 15 9.01 9.01- 8 11.03 11.03- 13.05 9. 13.05- 15.07 What percentage of these towns received between 4.97 and 11.03 inches of annual rainfall? Enter your answer as a percentage but without the percent symbol. Use two-decimal place accuracy, if necessary. MacBook Air
The data in the accompanying table represent the total rates of return (in percentages) for three stock exchanges over the four-year period from 2009 to 2012. Calculate the geometric mean rate of return for each of the three stock exchanges. Click the icon to view data table for total rate of return for stock market indices. Click the icon to view data table for total rate of return for platinum, gold, and silver. a. Compute the geometric mean rate of return per year for the stock indices from 2009 through 2012. For stock exchange A, the geometric mean rate of return for the four-year period 2009-2012 was %. (Type an integer or decimal rounded to two decimal places as needed.) Data table for total rate of return Year A B C 2012 6.52 13.15 15.93 2011 4.79 0.00 -2.47 2010 10.00 11.85 16.38 2009 18.63 23.62 43.12 Print Done - X C Geometric mean rate of return for stock market indices Metal Platinum Gold Silver Geometric mean rate of return D 13.54% 15.78% 20.52% Print Done X
Based on the frequency distribution above, what is the cumulative frequency for the class with lower class
The average fruit fly will lay 421 eggs into rotting fruit. A biologist wants to see if the average will be lower for flies that have a certain gene modified. The data below shows the number of eggs that were laid into rotting fruit by several fruit flies that had this gene modified. Assume that the distribution of the population is normal. 429, 426, 402, 401, 393, 424, 426, 415, 416, 422, 414, 428 What can be concluded at the the αα = 0.05 level of significance level of significance? For this study, we should use Correct The alternative hypothesis would be: H1:H1: Correct Correct Correct The test statistic Correct = (please show your answer to 3 decimal places.) Based on this, we should Correct the null hypothesis. Thus, the final conclusion is that ... Correct
The average fruit fly will lay 421 eggs into rotting fruit. A biologist wants to see if the average wil be lower for flies that have a certain gene modified. The data below shows the number of eggs that were laid into rotting fruit by several fruit flies that had this gene modified. Assume that the distribution of the population is normal. 429, 426, 402, 401, 393, 424, 426, 415, 416, 422, 414, 428 What can be concluded at the the a = 0.05 level of significance level of significance? a. For this study, we should use t-test for a population mean b. The alternative hypothesis would be: H: 421 c. The test statistic - -1.358 (please show your answer to 3 decimal places.) d. Based on this, we should fail to reject e. Thus, the final conclusion is that... The data suggest that the population mean number of eggs that fruit fies with this gene modified wil the null hypothesis.
Listed are the net sales for a San Francisco–area mail-order retailer for the years 2009 to 2018. Use the mean sales for the earliest three years to determine a base and then find the index for 2017 and 2018. (Round your answers to 1 decimal place.) By how much have net sales increased from the base period? (Round your answers to 1 decimal place.)
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Among fatal plane crashes that occurred during the past 50 years, 168 were due to pilot error, 67 were due to other human error, 488 were due to weather, 375 were due to mechanical problems, and 617 were due to sabotage. Construct the relative frequency distribution. What is the most serious threat to aviation safety, and can anything be done about it? Complete the relative frequency distribution below. Relative Frequency % % % Cause Pilot error Other human error Weather Mechanical problems Sabotage % (Round to one decimal place as needed.) What is the most serious threat to aviation safety, and can anything be done about it? A. Mechanical problems are the most serious threat to aviation safety. New planes could be better engineered. B. Sabotage is the most serious threat to aviation safety. Airport security could be increased. C. Weather is the most serious threat to aviation safety. Weather monitoring systems could be improved. D. Pilot error is the most serious threat to aviation…
What is the approximate forecast for November using a four-month moving average? Oct - 700Sept - 600Aug - 880July - 670June - 430

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