Suppose the U.S. president wants an estimate of the proportion of the population whosupport his current policy toward revisions in the health care system. The presidentwants the estimate to be within 0.03 of the true proportion. Assume a 90% level ofconfidence. The president's political advisors estimated the proportion supporting thecurrent policy to be 0.65. (Use z Distribution Table.)a.How large of a sample is required? (Round the z-values to 2 decimal places. Roundup your answer to the next whole number.)Sampleb. How large of a sample would be necessary if no estimate were available for theproportion supporting current policy? (Round the z-values to 2 decimal places.Round up your answer to the next whole number.)Sample

(a) The formula of sample size is, Procedure for finding the z-value is listed below: From the…

Answered: Suppose the U.S. president wants an…

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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a. Develop a hypothesis test that can be used to determine whether the mean annual consumption in Webster City is higher than the national mean. Ho: $21.5 Ha: >21.5 b. What is a point estimate of the difference between mean annual consumption in Webster City and the national mean? (2 decimals) c. At a = 0.01, test for a significant difference by completing the following. Calculate the value of the test statistic (2 decimals). The p-value is Reject the null hypothesis? (4 decimals) Yes v What is your conclusion? Conclude the population mean consumption of milk in Webster City is greater tha
For a distribution, the CV is 25.5% and the SD is 8.5. Calculate the value of the mean. a. 57.7 O b. 5.77 O c. 33.3 O d. 33.33
In a Gallup poll of 1236 adult respondents, 6% said that bad luck follows breaking a mirror. That percentage has a margin of error of 1.5 percentage points. Why is it misleading to state that the percentage is 6% with a margin of error of 1.5%?
Forest rangers believe that 30% of trees in a large national forest have a leaf fungus. A survery team will inspect a sample of 200 trees. a. Show the steps needed to justify and use a normal model to describe the percentage of fungus-infected trees that may appear in this sample. b. What proportion of infected trees in this sample would lead you to believe the true proportion of ifected trees is higher than the rangers believe?
Based on historical data at Portland State University, we believe that 44% of first year students do not visit their advisors regularly. For this year, you would like to obtain a new sample to estimate the proportion of first year students who do not visit their advisors regularly. You would like to be 99% confident that your estimate is within 4% of the true population proportion. How large of a sample size is required? Do not round mid-calculation. Give answer in whole people. n=
Number of persons in the household 1 2 A. Below is a distribution of the variable "hompop" from the 2016 General Social Survey dataset. This variable is a measure of the number of people in each respondent's household. Use the table to answer the following questions. 3 4 5 7 8 9 10 11 Total www Freq. 850 1,069 436 278 139 58 19 2,867 percent 29.65 37.29 15.21 9.70 4.85 2.02 0.66 0.31 0.24 0.03 0.03 100.00 Cum. 29.65 66.93 82.14 91.84 96.69 98.71 99.37 99.69 99.93 99.97 100.00 1
Which of the following predictions can be calculated using a geometric distribution? a. the number of expeditions that will reach the top of Mount Everest this year b. the number of trucks a weigh station will inspect before finding one that is overloaded C. both of the above d. neither of the above 31 SAMSUNG DIl 9% & 5 6 7 8. y
You are the operations manager for an airline and you are considering a higher fare level for passengers in aisle seats. How many randomly selected air passengers must you survey? Assume that you want to be 95% confident that the sample percentage is within 1.5 percentage points of the true population percentage. Complete parts (a) and (b) below. a. Assume that nothing is known about the percentage of passengers who prefer aisle seats. n= (Round up to the nearest integer.) b. Assume that a prior survey suggests that about 38% of air passengers prefer an aisle seat. @ 2 S n= (Round up to the nearest integer.) x дв nd # 3 E D BO C $ R F V 5 T G 6 B Y H 7 N *99 U J . 8 DHE I M ( 9 K be O O L 1 P command Time Remaining: 01:09:52 > ; I { [ option ? | . Next 1 delete
Fear of the dark is quite common among children. However, what about adults? One polling agency released the results of a survey that asked people over 30 years old if they keep the lights on at night. Among 808 respondents, 46% indeed leave the light on when going to sleep. Part: 0 / 2 Part 1 of 2 Calculate the margin of error for this survey. Round the percentage to one decimal place. Do not round intermediate steps. %. If 46% of 808 respondents keep the lights on at night, the margin of error is
In a regression analysis involving 30 observations, the following estimated regression equation was obtained. ŷ = 17.6 + 3.8xi – 2.3x2 + 7.6x3 + 2.7x4 For this estimated regression equation SST = 1805 and SSR = 1772. a. At a = 0.05, test the significance of the relashionship among the variables. SSE (to 1 decimal, if necessary) MSR (to 1 decimal, if necessary) MSE (to 2 decimals, if necessary) What is the value of the F test statistic (to 2 decimals)? Use Table 4 in Appendix B. What is the p-value? - Select your answer Using a = 0.05, what is your conclusion? - Select your answer - Suppose variables a1 and x4 are dropped from the model and the following estimated regression equation is obtained. ŷ = 11.1 – 3.6x2 + 8.1æ3 For this model SST = 1805 and SSR = 1,705. b. Compute SSE(x1, x2, X3, T4). (to 1 decimal, if necessary) c. Compute SSE(x2, x3). (to 1 decimal, if necessary)
The sample mean is the point estimator of O A. u О В. р O C. X O D. o

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