A medical researcher says that less than 83​% of adults in a certain country think that healthy children should be required to be vaccinated. In a random sample of 200 adults in that​ country, 80​% think that healthy children should be required to be vaccinated. At α=0.05​, is there enough evidence to support the​ researcher's claim? Complete parts​ (a) through​ (e) below. ​(a) Identify the claim and state H0 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 not​ round.)       B. Find the critical​ value(s) and identify the rejection​ region(s).   Identify the critical​ value(s) for this test.   z0= ​(Round to two decimal places as needed. Use a comma to separate answers as​ needed.)   ​(c) Find the standardized test statistic z.   z= ​(Round to two decimal places as​ needed.)   ​(d) Decide whether to reject or fail to reject the null hypothesis and​ (e) interpret the decision in the context of the original claim.       the null hypothesis. There   enough evidence to     the​ researcher's claim.

9.1 Q 8 ignore this, just to rememebr what question it is.

12% of all Americans suffer from sleep apnea. A researcher suspects that a higher percentage of those who live in the inner city have sleep apnea. Of the 349 people from the inner city surveyed, 45 of them suffered from sleep apnea. What can be concluded at the level of significance of αα = 0.05? Thus, the final conclusion is that ... The data suggest the population proportion is not significantly larger than 12% at αα = 0.05, so there is not sufficient evidence to conclude that the population proportion of inner city residents who have sleep apnea is larger than 12%. or  The data suggest the population proportion is not significantly larger than 12% at αα = 0.05, so there is sufficient evidence to conclude that the population proportion of inner city residents who have sleep apnea is equal to 12%. or The data suggest the populaton proportion  is significantly larger than 12% at αα = 0.05, so there is sufficient evidence to conclude that the population proportion of inner city…

A report by the Gallup Poll found that a woman visits her doctor, on average, at most 5.8 times each year. A random sample of 20 women results in these yearly visit totals. Data: 4; 2; 1; 3; 7; 2; 9; 4; 6; 6; 7; 0; 5; 6; 4; 2; 1; 3; 4; 2 a. At the α = 0.05 level can it be concluded that the sample mean is higher than 5.8 visits per year? α =   Ho: Ha: T – Test inpt: Data Stats µ0: List: Freq:1 µ ≠ µ0 < µ0 > µ0  Calculate         T – Test µ0: t = p=   sx : n:   Decision: Compare the p-value with alpha and give your decision. Conclusion:     b. Find a 95 % confidence interval of the true mean years visits of a woman to her doctor. TInterval Inpt: Data Stats   sx : n: C-Level: . Calculate T-Interval ( , )   sx : n:     Conclusion: We are 95% Confident……

3.  For a z-test we get a test statistic of z=2.05.    If our alternative hypothesis is "??:?>13Ha:μ>13", what Excel command would we use to compute the P-value?   If our alternative hypothesis is "??:?<13Ha:μ<13", what Excel command would se use to compute the P-value?

The NAEP considers that a national average of 283 is an acceptable performance. Using α = .05, run a two-tail t-test for one sample to test Ho: µ=283 for the 2019 scores. Report the t-obt, df, and p-values. Would you reject the null hypothesis that the 2019 scores come from a population with average 283? If this is the case, does it come from a population from larger or smaller average?

In a​ 4-week study about the effectiveness of using magnetic insoles to treat plantar heel​ pain, 51 subjects wore magnetic insoles and 47 subjects wore nonmagnetic insoles. The results are shown at the right. At α=0.06​, can you support the claim that there is a difference in the proportion of subjects who feel better between the two​groups? Assume the random samples are independent. Complete parts​ (a) through​ (e).

A researcher claims that 89% of people sleep with a pillow.  In a random sample of 1000 people, 825 say that they sleep with a pillow.  At α = 0.10, is there enough evidence to reject the researcher’s claim?

Researchers conducted an experiment in which people with a certain condition were given either a drug or a placebo to treat the condition. At the significance level of α=0.01α=0.01, a test of the following hypotheses was conducted. H0:pD=pPHa:pD>pPH0:pD=pPHa:pD>pP In the hypotheses, pDpD represents the proportion of all people who experience an allergic reaction while taking the drug, and pPpP represents the proportion of all people who experience an allergic reaction while taking the placebo. All conditions for inference were met, and the resulting pp-value was 0.12. Which of the following is the correct decision for the test?     The pp-value is less than αα, and the null hypothesis is rejected. There is convincing evidence to support the claim that the proportion of people with an allergic reaction will be greater for those taking the drug than for those taking the placebo. A The pp-value is less than αα, and the null hypothesis is rejected. There is…

In a study of obesity the following results were obtained from samples of males and females between the ages of 20 and 75: n Males 150 Females 200 Number Overweight 21 48 Can we conclude from these data that in the sampled populations there is a difference in the proportions who are overweight? Let α = .05.