The following hypotheses describe a _-tailed test. Ho : µ = 25 HA: µ + 25 three two one four
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- Among 200 randomly selected Internet users, it was found that 89 of them use the Internet for making travel plans. Use a significance level of alpha equal to 0.01 to test the claim that at least 50% of Internet users use it for making travel plans. What are the hypotheses?Historically, the time spent by DCSI3710 students on trying to certify any HLS homework is known to have a mean of 35 minutes. In order to examine the claim that homework 12.2 was actually more time-consuming, an instructor asked 16 students how much time they spent on it. Assume that the p-value associated with the test statistic is 0.03. At a significance level of 0.01, what is the conclusion of the hypothesis test?It has been determined that 37 out of 100 adult Americans that did not attend college believe in extra-terrestrials. However, from a random sample of 100 adult Americans that did not attend college 43 claim that they believe in extra-terrestrials. Does this indicate that the proportion of people who did not attend college and who believe in extra-terrestrials has changed? Conduct a hypothesis test with a = 0.01 and interpret the results.
- A hospital claims that the proportion of full term babies born in their hospital that weigh more than 7 pounds is 46%. In a random sample of 235 babies born in this hospital, 98 weigh over 7 pounds. Is there enough evidence to reject the hospitals claim at the 0.05 level of significance? Perform a 2 tailed test and complete the parts belowA survey shows that 10% of the population is victimized by property crime each year. A random sample of 527 older citizens (65 years or more of age) show a victimize rate of 14%. are older people more likely to be victimized? conduct both one and two-tailed tests of significance.A manufacturer claims him market share is 60%.However a random sample of 500 clients show that only 275supports his product. Test the manufacturer’s statement at 1%significance level.
- A research center claims that at least 26% of adults in a certain country think that their taxes will be audited. In a random sample of 800 adults in that country in a recent year, 23% say they are concerned that their taxes will be audited. At α =0.01, is there enough evidence to reject the center's claim? Find the standardized test statistic z = ? Decide whether to reject or fail to reject the null hypothesis and (e) interpret the decision in the context of the original claim.What is the p-value of a right-tailed one-mean hypothesis test, with a test statistic of z0=1.6? (Do not round your answer; compute your answer using a value from the table below.)What is the p-value of a left-tailed one-mean hypothesis test, with a test statistic of z0=−1.19? Use a p-value rounded to 3 decimal places.
- A hypothesis test was performed to decide whether houses are more prone to being lost to fire than condominiums are. The researcher looked at 1500 randomly selected houses and 1200 randomly selected condominiums over a ten year period. Then, since over 30 of each were in the sample, the researcher can use a z-Test for the difference between two proportions. true falseIn a preliminary study, the U.S. Veterans Affairs Department found that 20.9% of the 81 soldiers who were near an accidental nerve gas release just after the 1991 Persian Gulf War had muscle and bone ailments, compared to a rate of 15.5% for the 52,000 Gulf veterans who were not near that area. Use an appropriate test and the 0.10 level of signi?cance in examining if there is significance difference between these two rates. Select one: a. The Null hypothesis that two rates are not different is rejected as p-value=0.07 is less than 0.10 b. The Difference between two rates is not significant as p-value=0.17 and is more than alpha=0.10 c. The Alternative hypothesis that two proportions are not equal is accepted as p-value=0.09 and is less than 0.1 d. The Alternative hypothesis that two proportions are equal is rejected as p-value=0.14 and is more than alpha=0.1A paper reported that in a representative sample of 289 American teens age 16 to 17, there were 77 who indicated that they had sent a text message while driving. For purposes of this exercise, assume that this sample is a random sample of 16- to 17-year-old Americans. Do these data provide convincing evidence that more than a quarter of Americans age 16 to 17 have sent a text message while driving? Test the appropriate hypotheses using a significance level of 0.01. (Round your test statistic to two decimal places and your P-value to four decimal places.) z = P-value =