1:23A 5G 33 8-2 Final Exam i Saved Save & Exit Submit 6 The distribution pictured below is Multiple Choice О bimodal and skewed right. О bimodal and skewed left. О skewed right. Mc Graw Hill < Prev 6 of 19 Next > AA ezto.mheducation.com

The experiment was established to determine the effect of the C2 F6 flow rate on the uniformity of the etches on a silicon wafer used in integrated circuit manufacturing. All of the runs were made in random order. Data for two rates are as follow: C2F6 Flow(SCCM) Uniformity Observation 100 2.7 4.6 2.6 3.0 3.2 3.8 200 4.6 3.4 2.9 3.5 4.1 5.1 1) Does the C2 F6 flow rate affect average etch uniformity? Use α = 0.05 2) Create a boxplot and do the boxplot agree with your previous conclusion?

6. A research center claims that at least 30​% of adults in a certain country think that their taxes will be audited. In a random sample of 1200 adults in that country in a recent​ year, 26​% say they are concerned that their taxes will be audited. At α=0.10​, is there enough evidence to reject the​ center's claim? Complete parts​ (a) through​ (e) below.       Question content area bottom Part 1 ​(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.)   A. enter your response here   ​% of adults in the country think that their taxes will be audited.   B. The percentage of adults in the country who think that their taxes will be audited is not enter your response here   ​%.   C. At least 30   30​% of adults in the country think that their taxes will be audited. Your answer is correct.   D. Less than…

Exercise 6.28 provides data on sleep deprivation rates of Californians and Oregonians. The proportion of California residents who reported insucient rest or sleep during each of the preceding 30 days is 8.0%, while this proportion is 8.8% for Oregon residents. These data are based on simple random samples of 11,545 California and 4,691 Oregon residents. a) Conduct a hypothesis test to determine if these data provide strong evidence the rate of sleep deprivation is different for the two states. Use Oregon as Group A and California as Group B.Find the test statistic and p-value. b) It is possible the conclusion of the test in part (a) is incorrect. If this is the case, what type of error was made?

Chapter 6, Section 4-HT, Exercise 209 Use the t-distribution and the given sample results to complete the test of the given hypotheses. Assume the results come from random samples, and if the sample sizes are small, assume the underlying distributions are relatively normal.Test H0 : μ1=μ2 vs Ha : μ1>μ2 using the sample results x¯1=56, s1=8.2 with n1=30 and x¯2=51, s2=6.9 with n2=40.           (a) Give the test statistic and the p-value.Round your answer for the test statistic to two decimal places and your answer for the p-value to three decimal places.test statistic = p-value =             (b) What is the conclusion of the test? Test at a 5% level.     Reject H0.   Do not reject H0.

Chapter 6, Section 4-HT, Exercise 209 Use the t-distribution and the given sample results to complete the test of the given hypotheses. Assume the results come from random samples, and if the sample sizes are small, assume the underlying distributions are relatively normal.Test H0 : μ1=μ2 vs Ha : μ1>μ2 using the sample results x¯1=56, s1=8.2 with n1=30 and x¯2=51, s2=6.9 with n2=40.               Your answer is partially correct.  Try again.     (a) Give the test statistic and the p-value.Round your answer for the test statistic to two decimal places and your answer for the p-value to three decimal places.test statistic = p-value =               Correct.     (b) What is the conclusion of the test? Test at a 5% level.     Reject H0.   Do not reject H0.

TABLE 1 The director of cooperative education at a state college wants to examine the effect of cooperative education job experience on marketability in the work place. She takes a random sample of 4 students. For these 4, she finds out how many times each had a cooperative education job and how many job offers they received upon graduation. These data are presented in the table below. Student    CoopJobs    JobOffer 1                     1                 4 2                     2                 6 3                     1                 3 4                     0                 1   Referring to Table 1, set up a scatter plot with Coop Jobs as the horizontal axis and Job offer as the vertical axis

A student decides to spin a dime and determine the proportion of times it lands on heads. The student spins the dime 25 times and records that it lands on heads 17 times. Let p = the true proportion of times the dime would land on heads when spun. Under the assumption that the true proportion is 0.5, 100 simulated proportions for samples of size 25 is shown in the dotplot.  Using the dotplot, is there evidence that the proportion of times a spun dime lands on heads is greater than 0.5? A) Yes, a proportion of 0.68 proves that the true proportion of heads is greater than 0.5.   B) Yes, a proportion of 0.68 only occurred once out of 100 simulated proportions; therefore, there is sufficient evidence that the true proportion of heads is greater than 0.5.   C) No, a proportion of 0.68 is only 0.18 more than 0.5; therefore, there is insufficient evidence that the true proportion of heads is greater than 0.5.   D) No, a proportion of 0.68 or more occurred 7 times out of 100 simulated…

Chapter 6, Section 2-HT, Exercise 115 Use the t-distribution and the sample results to complete the test of the hypotheses. Use a 5% significance level. Assume the results come from a random sample, and if the sample size is small, assume the underlying distribution is relatively normal.Test H0 : μ=100 vs Ha : μ<100 using the sample results x¯=91.7, s=12.5, with n=30.           (a) Give the test statistic and the p-value.Round your answer for the test statistic to two decimal places and your answer for the p-value to three decimal places.test statistic = p-value =             (b) What is the conclusion?     Reject H0.   Do not reject H0.

A developmental psychologist is studying bonding between healthy newborn babies and immediate family members. He wants to know if one-week-old infants use smell to recognize their fathers. To investigate, he selects a random sample of one-week-old infants. Each infant is presented with a garment worn by his or her father and two garments worn by unrelated men. The psychologist observes which garment each of the infants orients toward. The resulting data are summarized in the following table that shows the number of infants who oriented toward each of the three garments.   What is are the degrees of freedom for this experiment?     4     3     1     2