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2) A researcher claims that more than 30 percent of Rutgers students use reading glasses. A...
CEO of SABA Co. claims that about 90 percent of the people who purchase contact lenses...
CEO of SABA Co. claims that about 90 percent of the people who
purchase contact lenses from them experience no difficulty. A
consumer agency thinks that less than 90 percent of customers are
happy with SABA’s product, therefore, from the company files, the
agency takes a random sample of 400 people who have purchased
contact lenses and finds that 340 have experienced no difficulty.
Test agency’s claim at the 0.05 level of significance. 1) What are
the alternative and null...
18. A researcher claims that more than 75% of the adults believe in global warming, Mimi conducte...
18. A researcher claims that more than 75% of the adults believe in global warming, Mimi conducted a survey on a random sample of 300 adults. The survey showed that 240 adults in the sample believe in global warming. Assume Mimi wants to use a 0.05 significance level to test the researcher's claim. (a) What is the appropriate hypothesis test to use for this analysis? Please identify and explain (b) Identify the null hypothesis and the alternative hypothesis. why it...
A researcher claims that the mean SAT scores is greater than 515. A sample of 1800...
A researcher claims that the mean SAT scores is greater than 515. A sample of 1800 students shows the sample mean SAT scores is 519 and sample standard deviation is 111. Test the claim at 0.1 level of significance. (a) State the null and alternative hypotheses. (b) Calculate test statistic. (c) Find critical value. (d) Write a conclusion based on your results in part (b) and part (c).
A researcher claims that the proportion of college students who plan to participate in community service...
A researcher claims that the proportion of college students who plan to participate in community service after graduation is greater than 35%. To test this claim, a survey asked 500 randomly selected college students if they planned to perform community service after graduation. Of those students, 195 indicated they planned to perform community service. The following is the setup m the following hypothesis test: H0:p=0.35 Ha:p>0.35 In this example, the p-value was determined to be 0.030. Come to a conclusion...
A researcher claims that more than 75% of the adults believe in global warming. Ryan conducted...
A researcher claims that more than 75% of the adults believe in global warming. Ryan conducted a survey on a random sample of 200 adults. The survey showed that 155 adults in the sample believe in global warming. Assume Ryan wants to use a 0.05 significance level to test the researcher’s claim. (a) What is the appropriate hypothesis test to use for this analysis? Please identify and explain why it is appropriate. (b) Identify the null hypothesis and the alternative...
For a particular task given to a large population of participants, a researcher claims that the...
For a particular task given to a large population of participants, a researcher claims that the mean completion time, u, of the population is 60 minutes. To test this claim, 50 subjects are chosen at random from this population and given the task independently. The mean completion time of these 50 subjects is 59 minutes. It is known that the population standard deviation of completion times is 6 minutes. Assume that the population is normally distributed. Can we reject the...
An education researcher claims that 54% of college students work year-round. In a random sample of...
An education researcher claims that 54% of college students work year-round. In a random sample of 200 college students, 108 say they work year-round. At a = 0.01, is there enough evidence to reject the researcher's claim? Complete parts (a) through (e) below. (a) Identify the claim and state Ho and Ha Identify the claim in this scenario. Select the correct choice below and fill in the answer box to complete your choice. (Type an integer or a decimal. Do...
A student believes that no more than 30%(le, 30%) of the students who finish a statistics...
A student believes that no more than 30%(le, 30%) of the students who finish a statistics course get an AA random sample of 100 students was taken. They four percent of the students in the sample received As State the null and alternative hypotheses. Using the critical value approach, test the hypotheses at the 5% level of significance. What are the appropriate hypothesis pairs for this test? Multiple Choice Hops 0.30 Ha:p0.30 0 Hop=0.30 HD 0.30 Hop 0.34 Ha: p<034...
An education researcher claims that at most 8% of working college students are employed as teachers...
An education researcher claims that at most 8% of working college students are employed as teachers or teaching assistants. In a random sample of 200 working college students, 10% are employed as teachers or teaching assistants. At a = 0.01, is there enough evidence to reject the researcher's claim? Complete parts (a) through (e) below. (a) Identify the claim and state Ho and Ha Identify the claim in this scenario. Select the correct choice below and fill in the answer...
An e-commerce research company claims that 60% or more graduate students have bought merchandise on-line. A...
An e-commerce research company claims that 60% or more graduate students have bought merchandise on-line. A consumer group is suspicious of the claim and thinks that the proportion is lower than 60%. A random sample of 80 graduate students show that only 22 students have ever done so. Is there enough evidence to show that the true proportion is lower than 60%? Conduct the test at 10% Type I error rate, and use both p-value and rejection region approaches. **Make...
CEO of SABA Co. claims that about 90 percent of the people who
purchase contact lenses from them experience no difficulty. A
consumer agency thinks that less than 90 percent of customers are
happy with SABA’s product, therefore, from the company files, the
agency takes a random sample of 400 people who have purchased
contact lenses and finds that 340 have experienced no difficulty.
Test agency’s claim at the 0.05 level of significance. 1) What are
the alternative and null...
18. A researcher claims that more than 75% of the adults believe in global warming, Mimi conducted a survey on a random sample of 300 adults. The survey showed that 240 adults in the sample believe in global warming. Assume Mimi wants to use a 0.05 significance level to test the researcher's claim. (a) What is the appropriate hypothesis test to use for this analysis? Please identify and explain (b) Identify the null hypothesis and the alternative hypothesis. why it...
For a particular task given to a large population of participants, a researcher claims that the mean completion time, u, of the population is 60 minutes. To test this claim, 50 subjects are chosen at random from this population and given the task independently. The mean completion time of these 50 subjects is 59 minutes. It is known that the population standard deviation of completion times is 6 minutes. Assume that the population is normally distributed. Can we reject the...
An education researcher claims that 54% of college students work year-round. In a random sample of 200 college students, 108 say they work year-round. At a = 0.01, is there enough evidence to reject the researcher's claim? Complete parts (a) through (e) below. (a) Identify the claim and state Ho and Ha Identify the claim in this scenario. Select the correct choice below and fill in the answer box to complete your choice. (Type an integer or a decimal. Do...
A student believes that no more than 30%(le, 30%) of the students who finish a statistics course get an AA random sample of 100 students was taken. They four percent of the students in the sample received As State the null and alternative hypotheses. Using the critical value approach, test the hypotheses at the 5% level of significance. What are the appropriate hypothesis pairs for this test? Multiple Choice Hops 0.30 Ha:p0.30 0 Hop=0.30 HD 0.30 Hop 0.34 Ha: p<034...
An education researcher claims that at most 8% of working college students are employed as teachers or teaching assistants. In a random sample of 200 working college students, 10% are employed as teachers or teaching assistants. At a = 0.01, is there enough evidence to reject the researcher's claim? Complete parts (a) through (e) below. (a) Identify the claim and state Ho and Ha Identify the claim in this scenario. Select the correct choice below and fill in the answer...
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