Plan a hypothesis test (plan for the test- Theory only) to confirm or disprove that Age have great influence on the Knowledge of 20 students Age 0- Age 18- Age 30- Age 40- Age 50- Age 60- Age 70- Age AgeUnknown1729304959697980+Positive 5722522122118414993101Negative 17156455153050843322526314

Age 0-17 18-29 30-39 40-49 50-59 60-69 70-79 80 unknown positive 57 225 221 221 184 149 93 101 0…

Answered: only) to confirm or dis

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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Suppose that the insurance companies randomly surveyed 400 drivers and found that 320 claimed they always buckle up. We are interested in the population proportion of drivers who claim they always buckle up. Use this scenario for the next 4 questions. What is the meaning of p ^ in the context of this scenario? Group of answer choices the proportion of drivers who claim they always buckle up in the POPULATION Neither of these the proportion of drivers who claim they always buckle up in the SAMPLE What is the value of p ^ in the context of this scenario? f you wanted to estimate the true percentage of drivers who claim they always buckle up to within 1% error with 95% confidence, how many drivers would you need to survey? You may use the pilot study as a preliminary estimate of p ^.
February 12, 2009 marked the 20oth anniversary of Charles Darwin's birth. To celebrate, Gallup, a national polling organization, surveyed 1,018 randomly selected American adults about their education level and their beliefs about the theory of evolution. In their sample, 325 of their respondents had some college education and 228 were college graduates. Among the 325 respondents with some college education, 133 said that they believed in the theory of evolution. Among the 228 respondents who were college graduates, 121 said that they believed in the theory of evolution. Construct a 90% confidence interval for the difference between the proportions of college graduates and individuals with some college who believe in the theory of evolution. Round your sample proportions and margin of error to three decimal places. O 0.012 to 0.232 O 0.038 to 0.206 O 0.052 to 0.192 O 0.079 to 0.165 Save for Later Attempts: 0 of 1 used Submit Answer
ific Calculator Of30shg/ckivdfk1p00003g5tgeftOid1 Agroup of researchers in New York wants to test if there is any relationship between living in California and preferring warm weather to cold weather. The researchers send out an online questionnaire to 200 randomly chosen people in the US asking several questions including: "Do you live in California?" and "Do you prefer warm weather to cold weather?". The results are summarized in the table below: Prefers Warm Weather 80 Prefers Cold Weather 42 Lives in California Doesn't Live in California 35 43 Test the null hypothesis that the choices on these two questions are independent versus the alternative that they are dependent. What are the p-value and conclusion of this test if the test is performed at the alpha =0.1 level? %3D p-value = 0.0091; Fail to reject the null hypothesis %3D p-value = 0.0039; Reject the null hypothesis p-value = 0.0039; Fail to reject the null hypothesis p-value = 0.0911; Reject the null hypothesis NEXT
Students in an elementary school both boys and girls were asked if they are willing to write a letter to their mother on Mother's Day as an assignment. Out of the 30 boys, only 9 answered "yes" while out of the 45 girls, 39 said that they are willing to write to their mother on Mother's Day. At 99% level of confidence, is there enough evidence to say that the proportion who said "yes" is more for girls than boys? . Но: На: Test Statistic: Test Procedure: Decision Rule: Computation: Decision: Conclusion:
Suzette does an experiment where she collects date from 5 women snd obtains the scores: 4, 4, 5, 2, 5. She hypothesizes that the population mean for the population from which these scores are drawn is 3. She wants to test whether this hypothesis is true. What is the alternative hypothesis she is testing?
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There are 3 parts to this question!! Answer each part in a separate blank! The average price per square foot for a home in a large county in a certain state is $225. The council of a country town wonders if the mean price of the homes in their town is less than the mean price of the homes in the county. The town council selected a random sample of 9 homes that have recently sold in their town. They found the price per square foot and want to perform a hypothesis test at the 0. 05 significance level. The data is listed below. 221.4 213.1 219.1 229.6 220.7 224.4 221.6 217.8 223.9 1. Calculate the test statistic and the P-value. 2. What is the decision at the given significance level? 3. What do you conclude?

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