The Decision which supports economist claim, for the test of hypothesis, at the level α=0.50 and the z statistic is (- 1.69 ), to test the hypothesis, Ho • u1 = u2 Ha • u1 is not equal u 2
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The Decision which supports economist claim, for the test of hypothesis, at the level α=0.50 and the z statistic is (- 1.69 ), to test the hypothesis, Ho • u1 = u2
Ha • u1 is not equal u 2
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- This is the result of Chi Square test between 2 variables: gender and length of service. If the Null Hypothesis is stated as "There is no significant association between gender and length of service", then table above will clearly allow us to conclude that "there is no significant association between gender and length of service". A. True B. FalseThe results of a common standardized test used in psychology research is designed so that the population mean is 105 and the standard devlation is 30. A subject earns a score of 108. What is the Z-score for this raw score? Z-Score =You are testing H0: u=10 vs Ha: u<10 using a t-test with 21 degrees of freedom. If the p-value of this test is found to be .01, what is the test statistic for this test?
- In 2014, a survey found that 156 of 800 adults said they learned Japanese by watching anime and having the subtitles in English. Then in 2019 another survey was conducted and found that 240 of 1000 said they learned Japanese by watching anime and having the subtitles in English. Test the claim to see if there is a difference between the years of the surveys using a z-score of -2.08 and a 0.05 level of significance. a) Find Ho and H4. b) Find Test Stat, the critical value and analyze it. c) Write the Conclusion.Researchers collected data on the numbers of hospital admissions resulting from motor vehicle crashes, and results are given below for Fridays on the 6th of a month and Fridays on the following 13th of the same month. Use a 0.05 significance level to test the claim that when the 13th day of a month falls on a Friday, the numbers of hospital admissions from motor vehicle crashes are not affected. Friday the 6th: Friday the 13th: 10 10 13 11 13 69 11A new cream that advertises that it can reduce wrinkles and improve skin was subject to a recent study. A sample of 68 women over the age of 50 used the new cream for 6 months. Of those 68 women, 39 of them reported skin improvement(as judged by a dermatologist). Is this evidence that the cream will improve the skin of more than 40% of women over the age of 50? Test using a= 0.05 (a) Test statistic: z= (b) The final conclusion is...A. There is not sufficient evidence to reject the null hypothesis that p=0.4 . That is, there is not sufficient evidence to reject that the cream can improve the skin of more than 40% of women over 50.B. We can reject the null hypothesis that p=0.4 and accept that p>0.4. That is, the cream can improve the skin of more than 40% of women over 50.
- How do we find the gamma and the p-value to evaluate the hypothesis that people who are more satisfied with their jobs are more likely to be happily married than those who are less satisfied with their jobs? The table is attatched.How the correlated t test is computed by first computing the difference between the two scores?A pharmaceutical company wants to test whether their the incidence of side effects (i.e. adverse events) differs between the treatment and placebo groups at the a = 0.05. Let pı = the proportion of subjects in the treatment groups who experienced at least one adverse event and let p2 = the proportion of subjects in the placebo group who experience at least one adverse event. 8 out of 30 people in the treatment group experienced at least one adverse event and 5 out of 30 people in the placebo group experienced at least one adverse event. (a) Set up the null and alternative hypothesis (using mathematical notation/numbers AND interpret them in context of the problem) (b) Calculate the test statistic (c) Calculate the critical value (d) Draw a picture of the distribution of the test statistic under Ho. Label and provide values for the critical value and the test statistic, and shade the critical region. (e) Make and justify a statistical decision at the a = 0.05 level and state your…
- A survey claims that 9 out of 10 doctors (i.e., 90%) recommend Kiva for their patients who have children. To testthis claim at ? = 0.05, against the alternative that the actual proportion of doctors who recommend Kiva is lessthan 90%, a random sample of 100 doctors results in 83 who indicate that they recommend Kiva. Based on thedata is it the case that 90% of doctors recommend drugs to parents so thay can deal with their children? A) State the hypothesis: B) Criitical valueC) Test stat istic and decision aboiut HoD) The conclusion about the problem statement.A producer of mobile phones claims that 20% of all mobile phone users prefer its product. To test the claim, a random sample of 151 mobile phone users is selected and it turns out that 28 prefer the producer’s brand. Do the data provide sufficient evidence that the production of mobile phone users who prefer the producer’s brand is less than 0.20? Test, using ? = 0.01.A SAMPLE OF EMPLOYEES IS SELECTED AND IT IS FOUND THAT 50% OWN COMPUTER. iS THIS A PARAMETER OF STATISTIC AND WHY?a SAMPLE OF SENIORS IS SELECTED AND IT IS FOUND THAT 50% OWN A CAR> iS THIS A STATISTIC OR PARAMETER AND WHY?