identify The research hypothesis H1 The null hypothesis HO The rejection region of the null hypothesis H1: H1 – H2 < 0 Họ: H1 - H2 > 0 1. H;: µ1 < H2 2. Ho: H1 2 H2 3. (-00, -tin-1)] 1. H;: H1 > H2 2. Ho: H1 < H2 3. (-00, tin-1] H1: H1 - H2 > 0 Ho: H1 - H2 < 0 H1: H1 - H2 > 0 Họ: H1 – H2 < 0 1. H;: H1 > H2 2. Ho: H1 < H2 3. [tin-1) , 0) 1. H;: H1 < H2 2. Ho: H1 2 H2 3. [t(n-1) , 0) H;: H1 – H2 < 0 Họ: 41 - H2 > 0
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- When a man observed a sobriety checkpoint conducted by a police department, he saw 656 drivers were screened and 5 were arrested for driving while intoxicated. Based on those results, we can estimate that P(W)equals=0.00762,where W denotes the event of screening a driver and getting someone who is intoxicated. What does P(W) denote, and what is its value? What does P(W) represent? P(W)=37. Researchers claim that 60 tissues is the average number of tissues a person uses during the course of a cold. The company who makes Kleenex bran tissues thinks that fewer of their tissues are needed. What are their null and alternative hypotheses? =/ means not equal H0: μ-60 vs H1: μ60A sample is selected from a population with A = 150. After a treatment is administered to the individuals, the sample mean is found to be = 140 and the standard deviation is S= 9. If the sample has n = 18 scores, determine whether the sample is sufficient to conclude that the treatment has significant effect. Use a two tail test with a = 0.02. (Assume the population is normally distributed)
- (1 point) According to a recent marketing campaign, 100 drinkers of either Diet Coke or Diet Pepsi participated in a blind taste test to see which of the drinks was their favorite. In one Pepsi television commercial, an anouncer states that "in recent blind taste tests, more than one half of the surveyed preferred Diet Pepsi over Diet Coke." Suppose that out of those 100, 42 preferred Diet Pepsi. Test the hypothesis, using a = 0.05 that more than half of all participants will select Diet Pepsi in a blind taste test by giving the following: (a) the test statistic (b) the critical z scoreFor each statement, express the null hypothesis Ho and alternative hypothesis H in symbolic form. 1. The mean annual consumption of beer u in the nation's capital is less than the national mean lo- OA. Ho : µ = Ho, H1 : H # Ho OB. Ho : µ = Ho, H1 : H > Ho OC. Ho : µ = Ho, H1 : µ 98.6 98.6, H : µ 98.6, H u < 98.6 Classify the hypothesis test as two-tailed, left-tailed or right-tailed. OA. Right-tailed B. Left-tailed C. Two-tailed-Work-Microsoft Edge ps://testnavclient.psonsvc.net/#/question/9d8da897-7504-4896-b4bb-a2932d472835/a72f044b-928a-49ae-80b2-f0d432db5ee1 Bookmark ▸ A X ← Review METRY FINAL EXAM 2021-22 / 2 of 21 Circle O has diameter AB and chord AC. Calculate the measure of CAB if BC = 38°. B 4 be here to search O Bi 78°F A C 3 101 $ 4 % 5 (C & no 16 fg to, In 12 (11¹) hom
- Arm circumferences (cm) and heights (cm) are measured from randomly selected adult females. The 139 pairs of measurements yield x = 31.99 cm, y = 163.33 cm, r= 0.032, P-value = 0.708, and y = 158 + 0.1703x. Find the best predicted value of y (height) given an adult female with an arm circumference of 35.0 cm. Let the predictor variable x be arm circumference and the response variable y be height. Use a 0.05 significance level. %3D ..... The best predicted value is cm. (Round to two decimal places as needed.)1. In the past, a chemical company produced 880 pounds of a certain type of plastic per day. Now, using a newly developed and less expensive process, the mean daily yield of plastic for the first 50 days of production is 871 pounds; the standard deviation is 21 pounds. Do the data provide sufficient evidence to indicate that the mean daily yield for the new process is less than that of the old procedure? (Use a=0.05) (d) Conclusion of the test above is Reject the null hypothesis and the mean daily yield for the new process is less than that of the old procedure. Do not reject the null hypothesis and the mean daily yield for the new process is not less than that of the old procedure. Reject the null hypothesis and the mean daily yield for the new process is not less than that of the old procedure O #3 99+ M 1941 9 O (?) + [ Rain... = 41. insert E b pIQ: Scores on a certain IQ test are known to have a mean of 100 . A random sample of 39 students attend a series of coaching classes before taking the test. Let μ be the population mean IQ score that would occur if every student took the coaching classes. The classes are successful if >μ100 . A test is made of the hypotheses =:H0μ100 versus >:H1μ100 . Consider three possible conclusions: (i) The classes are successful. (ii) The classes are not successful. (iii) The classes might not be successful.
- Compute the power of the test if the researcher uses a sample of n = 4 individuals. The power for the test is the probability of obtaining a z-score than , which corresponds to p = Thus, the power of the test is %. Compute the power of the test if the researcher uses a sample of n = 25 individuals. The power for the test is the probability of obtaining a z-score than which corresponds to p = Thus, the %3D power of the test is 이0.2/18/22, 10:14 AM M2623 Worksheet 6 - Chapter 5(1).html 5. (5.7.4) A UMass Boston student has earned 55 credits toward his degree but has a GPAof just 1.80. The registrar has informed him that he is on probation and will be suspended unless his overall GPA is at least 2.0 after one more semester. a. If he takes 12 credits, what is the minimum GPA he must earn in that semester to avoid being suspended? b. Answer the same question if he takes 9 credits. c. What if he took just 6 credits? d. Write a few sentences describing what these situations mean. file J/C:/Users/belliott/Downloads/M2623 Worksheet 6 - Chapter 5(1).htmlIn this problem, assume that the distribution of differences is approximately normal. Note: For degrees of freedom d.f. not in the Student's t table, use the closest d.f. that is smaller. In some situations, this choice of d.f. may increase the P-value by a small amount and therefore produce a slightly more "conservative" answer. At five weather stations on Trail Ridge Road in Rocky Mountain National Park, the peak wind gusts (in miles per hour) for January and April are recorded below. Weather Station 1 4 120 126 64 78 January April 139 104 111 100 88 61 Does this information indicate that the peak wind gusts are higher in January than in April? Use a = 0.01. (Let d = January- April.) (a) What is the level of significance? State the null and alternate hypotheses. Will you use a left-tailed, right-tailed, or two-tailed test? O Ho: Hg> 0; H,: Hj= = 0; right-tailed O Ho: Hg = 0; H,:0; left-tailed O Ho: H = 0; H,:H# 0; two-tailed O Ho: Hg = 0; H, > 0; right-tailed (b) What sampling…