Ho: Select an answer H₁: Select an answer ? O ?
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- What is meant by the sample space of an experiment?Kevin, a Human Resources professional, would like to make the claim that the average hourly wage for administrative workers at his company is less than $9.69. Kevin samples 15 workers and obtains a sample mean of $8.80 per hour. At the 1% significance level, should Kevin reject or fail to reject the null hypothesis given the sample data below?2. Is there a difference in the proportion of individuals with food allergiesbetween young children and adults? A survey finds that 62 among a simplerandom sample of 350 young children have some food allergy, comparedwith 26 out of 250 adults. e. Based on a 5% significance level, what conclusion should be made?
- Do you believe that more than 92% of google play apps are free? to answer the question above, a sample of 1000 google play apps was collected and 932 of them was found to be free. a). does this data provide strong evidence (at 5% level) that more than 92% of google play apps are free? b). what is your conclusion if the significance level now is 10%?A sample of 45 households reveals that 23% have traveled overseas. Is this significantly different from a hypothesized value of 30%, which characterizes the entire country? Use a significance level of 0.05. Write down the null and alternative hypotheses, find the test statistic and the p-value, and state your conclusion.Determine whether the alternative hypothesis is supported at a 0.05 significance level. would B be correct?
- A recent survey showed that from a sample of 500 packages delivered by a Postal Service, 480 were delivered on time. b). The manager of the postal services claims that 98 percent of their mail are delivered on time. He wants to test at the 1% significance level to determine whether the true proportion is less than 98 percent. (iv). state the decision rule (v). give your decision based on the available sample evidence (vi). Hence, state your conclusionHistorically, the percentage of U.S. residents who support stricter gun control laws has been 55%. A recent Gallup Poll of 2500 people showed 1723 in favor of stricter gun control laws . Assume the poll was given to a random sample of people. QUESTION Test the claim that the proportion of those favoring stricter gun control has changed from 0.55. Perform a hypothesis test, using a significance level of 0.01. What is the standard error? (round to the nearest thousandth)The drug Ritalin is designed to stimulate the central nervous system. In a random sample of 252 boys aged ten – twelve years old, it was found that 44 of the boys were taking Ritalin. It is known that the proportion of all boys aged 13 – 15 who take Ritalin is 24%. A researcher claims that the population proportions of boys who take Ritalin aged 10 – 12 is different than boys aged 13 – 15. Can you support this claim at the 5% significance level? a. Conduct a hypothesis test to test the claim at the 5% significance level. Be sure to state you Ho and Ha, your test statistic and p-value, whether or not you reject Ho and whether you support the claim. b. Show that you can use the large sample methodology. c. Write a complete sentence describing what a Type I error is in context.
- A concerned group of citizens wanted to know if the proportion of forcible rapes in Indonesia was different in 2011 than in 2010. Their research showed that of the 113,231 violent crimes in Indonesia in 2010, 7,622 of them were forcible rapes. In 2011, 7,439 of the 104,873 violent crimes were in the forcible rape category. Test at a 5% significance level. Answer the following questions: Is this a test of two means or two proportions? Which distribution do you use to perform the test? What is the random variable? Write the null and alternative hypothesis in symbols. Is this test right-, left-, or two-tailed? What is the p-value? Do you reject or not reject the null hypothesis? At the ___ level of significance, from the sample data, there ______ (is/is not) sufficient evidence to conclude that ____________.The US Department of Energy reported that 49% of homes were heated by natural gas. A random sample of 327 homes in Oregon found that 143 were heated by natural gas. Test the claim that proportion of homes in Oregon that were heated by natural gas is different than what was reported. Use a 10% significance level. Give answer to at least 4 decimal places. a. What are the correct hypotheses? (Select the correct symbols and use decimal values not percentages.) H0: H1: Based on the hypotheses, compute the following:b. Test Statistic = c. p-value = d. Based on the above we choose to e. The correct summary would be: that the proportion of homes in Oregon that were heated by natural gas is different than what the DOE reported value of 49%. Question HelpQuestion 14: Video1What would be the actual significance level (alpha) if 4 (four) group means were tested usingindependent pairwise t‐tests, each with a 95% confidence level?
