Question Help ♥ Data collected by a behavioral risk factor surveillance group revealed that in a state, 29.8% of whites and 45.5% of blacks were cigarette smokers. Suppose these proportions were based on samples of 3595 whites and 481 blacks. a) Create a 99% confidence interval for this difference. b) Does this survey indicate a race-based difference in smoking among American adults? Explain, using your confidence interval to test an appropriate hypothesis. c) What alpha level did your test use? a) Let p, be the sample proportion of whites who were cigarette smokers and p, be the sample proportion of blacks who were cigarette smokers. Create a 99% confidence interval for the difference between the two proportions, p,-P2- (Round to three decimal places as needed. Use ascending order.) b) State the hypotheses for the test. Ho H. (Type integers or decimals. Do not round.) State the conclusion. Since the interval the null hypothesis. This study V evidence of a race-based difference in smoking among American adults. c) a= Type an integer or a decimal. Do not round.) does not provide provides

Question Help ♥ Data collected by a behavioral risk factor surveillance group revealed that in a state, 29.8% of whites and 45.5% of blacks were cigarette smokers. Suppose these proportions were based on samples of 3595 whites and 481 blacks. a) Create a 99% confidence interval for this difference. b) Does this survey indicate a race-based difference in smoking among American adults? Explain, using your confidence interval to test an appropriate hypothesis. c) What alpha level did your test use? a) Let p, be the sample proportion of whites who were cigarette smokers and p, be the sample proportion of blacks who were cigarette smokers. Create a 99% confidence interval for the difference between the two proportions, p,-P2- (Round to three decimal places as needed. Use ascending order.) b) State the hypotheses for the test. Ho H. (Type integers or decimals. Do not round.) State the conclusion. Since the interval the null hypothesis. This study V evidence of a race-based difference in smoking among American adults. c) a= Type an integer or a decimal. Do not round.) does not provide provides

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Description: Question Help vData collected by a behavioral risk factor surveillance group revealed that in a state, 29.8% of whites and 45.5% of blacks were cigarette smokers. Suppose these proportions were based on samples of 3595 whites and 481 blacks.a) Creat

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 and B??
. An educator was trying to determine the effect of remote learning on middle school aged children. They randomly selected 250 students who spent a full year with in person learning and 190 of them showed similar or improved scores on a set of metrics. They also randomly selected 350 student who spent the year remotely learning and 252 of them showed similar or improved scores.a. Construct a 95% confidence interval for the difference of proportions? b. Based on the confidence interval can you conclude there is adifference between the two groups?
What Z score would be used to construct a 90% confidence level? Is it ... a. 1.65 b. 2.33 c. 2.58 d. 1.96
Your analysis of the raw data indicates that 16 of the 30 students reported driving no more than 20 miles per day. Calculate a 98% confidence interval for the sample proportion. What Z Score was used?
4. Researchers are interested in the average heart rate of male college students. Assume a random sample of 130 male college students were taken from 200 students for the study. Find a 95% confidence interval for the actual proportion of students.
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Results on seat belt usage from the 2003 Youth Risk Behavior Survey were published in a USA Snapshot on January 13, 2005. The following table outlines the results from the high school students who were surveyed in the state of Nebraska. They were asked whether or not they rarely or never wear seat belts when riding in someone else's car. Using ? = .05, does this sample present sufficient evidence to reject the hypothesis that gender is independent of seat belt usage? Female Male Rarely or never use seat belt 206 323 Uses seat belt 1220 1157 (a) Find the test statistic. (Give your answer correct to two decimal places.)(ii) Find the p-value. (Give your answer bounds exactly.) ______< p < ________
Suppose we wish to estimate the average number of hours per week that Americans watch TV. Use the following data from an SRS to find a 90% confidence interval: 30 64 49 40 21 58 9 43 39 43
A learn-to-type software program claims that it can improve your typing skills. To test the claim and possibly help yourself out, you and six of your friends decide to try the program and see what happens. Use the table below to construct an 80% confidence interval for the true mean change in the typing speeds for people who have completed the typing program. Let Population 1 be the typing speed before taking the program and Population 2 be the typing speed after taking the program. Round the endpoints of the interval to one decimal place, if necessary. Typing Speeds (in Words per Minute) Before After 32 33 51 42 55 40 35 32 54 33 45 30 50 52
You want to estimate the average difference in the number of complaints filed by women at work and the number of complaints filed by men at work. You took an SRS of 7 businesses and collected the following data for number of complaints in a year: men 1 3 2 4 6 3 5 women 8 7 6 3 5 12 15 Create a 90% confidence interval for the average difference in the number of complaints filed by women at work and the number of complaints filed by men at work (in a year). You must do this using table C. If this is a 2 sample interval, be sure to specify who is population 1 and who is population 2. If this is a matched pairs interval, be sure to state the order you subtracted your data. Once you create your interval, give a sentence explaining the meaning of the interval (what the numbers in the interval mean, NOT the meaning of 95%) in context of this problem. Round to any appropriate number of decimals.
10. Several years ago, 51% of parents who had children in grades K-12 were satisfied with the quality of education the students receive. A recent poll asked 1,075 parents who have children in grades K-12 if they were satisfied with the quality of education the students receive. Of the 1,075 surveyed, 472 indicated that they were satisfied. Construct a 99% confidence interval to assess whether this represents evidence that parents' attitudes toward the quality of education have changed. What are the null and alternative hypotheses? Ho: p (1) versus H1: p (2) (Round to two decimal places as needed.) Use technology to find the 99% confidence interval. The lower bound is The upper bound is (Round to two decimal places as needed.) What is the correct conclusion? O A. Since the interval contains the proportion stated in the null hypothesis, there is insufficient evidence that parents' att O B. Since the interval contains the proportion stated in the null hypothesis, there is sufficient…
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