Determine the null and alternative
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A: Note: Hi there! Thank you for posting the question. As your question has more than 3 parts, we have…
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A: Solution: From the given information, confidence level is 0.99, σ=71.3 and E=0.1.
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A: Hi! Thank you for the question, As per the honor code, we are allowed to answer three sub-parts at a…
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Determine the null and alternative hypotheses based on the following:
The standard deviation in the pressure required to open a certain valve is known to be s = 1.1 psi. Due to changes in the manufacturing process, the quality-control manager feels that the pressure variability has increased.
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- Answer the following to summarize the test of the hypothesis that there is no dependence between age and software use. For your test, use the 0.10 level of significance. A. Find the value of the test statistic. (Round to two or more decimal places.) B. Find the critical value for a test at the 0.10 level of significance. (Round to two or more decimal places.) C. Can we reject the hypothesis that there is no dependence between age and software use? Use the 0.10 level of significance.For each problem, select the best response. (a) The scores of adults on an IQ test is approximately Normal with mean 100 and standard deviation 15. Corinne scores 118 on such test. Her z-score is about O A. 0.67 OB. 1.2 O C. 7.87 OD. 18 O E. None of the above. (b) A researcher wishes to determine whether the rate of water flow (in liters per second) over an experimental soil bed can be used to predict the amount of soil washed away (in kilograms). In this study, the explanatory variable is the O A. size of the soil bed. O B. rate of water flow. OC. amount of eroded soil. O D. depth of the soil bed. O E. None of the above. (c) Smokers don't live as long (on the average) as nonsmokers, and heavy smokers don't live as long as light smokers. You regress the age at death of a group of male smokers on the number of packs per day they smoked. The slope of your regression line A. will be greater than zero. OB. will be less than zero. OC. must be between 1 and 1. D. can't tell without seeing…Please answer question b.
- You wish to test the following claim (H1) at a significance level of a = 0.02. For the context of this problem, Hd = µ2 -H1 where the first data set represents a pre-test and the second data set represents a post-test. H.:µa = 0 0 > Prt : 'H You believe the population of difference scores is normally distributed, but you do not know the standard deviation. You obtain pre-test and post-test samples for n = 41 subjects. The average difference (post - pre) is d = - 2.7 with a standard deviation of the differences of sa = 14.2. What is the test statistic for this sample? (Report answer accurate to three decimal places.) test statistic = What is the p-value for this sample? (Note: If you do not have a Ti-83/84, then please use the Google Sheet function =TDIST(abs(Test Stat),degrees of freedom, tails), where tails is equal to 1 or 2 depending on the test, to report the answer accurate to four decimal places. Use the rounded test statistic value.) p-value = The p-value is... O less than (or…Please answer a-d2. Suppose that we are testing Ho following observed values of the test (a) Zo= 2.45 (b) Zo= -1.53 = po versus H₁>po. Calculate the p-value for the statistic: (c) Zo= 2.15 (e) Zo= -0.35 (d) Zo = 1.95
- Please help answering this questionOur environment is very sensitive to the amount of ozone in the upper atmosphere. The level of ozone normally found is 4.6 parts/million (ppm). A researcher believes that the current ozone level is at an excess level. The mean of 14 samples is 4.9 ppm with a variance of 1.2 Does the data support the claim at the 0.01 level? Assume the population distribution is approximately normal. Step 2 of 5 : Find the value of the test statistic. Round your answer to three decimal places.Information from the Department of Motor Vehicles indicates that the average age of licensed drivers is µ = 45.7 years with a standard deviation of σ = 12.5 years. Assuming that the distribution of drivers’ ages is approximately normal, answer the following questions: a. What proportion of licensed drivers are older than 50 years old? b. What proportion of licensed drivers are younger than 30 years old?
- The Quality Assurance Department is anxious to improve the nominal value of the resistors to ensure more of them fall within the rated tolerance band. The manufacturing process is adjusted in an attempt to bring about this improvement. Following the adjustment, a further sample of 100 resistors is taken in order to determine if the adjustment has resulted in an improvement to the nominal value of the resistors. Analysing this second sample, it is noted that the mean value is now 21.8kΩ, with a standard deviation of 1kΩ how do i takcle this?Our environment is very sensitive to the amount of ozone in the upper atmosphere. The level of ozone normally found is 5.8 parts/million (ppm). A researcher believes that the current ozone level is at an excess level. The mean of 26 samples is 5.9 ppm with a standard deviation of 0.6. Does the data support the claim at the 0.01 level? Assume the population distribution is approximately normal. Step 1 of 5: State the null and alternative hypotheses. Answer Ho: Ha: Tables Keypad Keyboard ShortcutsAnswer the following to summarize the test of the hypothesis that there is no dependence between age and software use. For your test, use the 0.10 level of significance. A. Find the value of the test statistic. (Round to two or more decimal places.) B. Find the critical value for a test at the 0.10 level of significance. (Round to two or more decimal places.) C. Can we reject the hypothesis that there is no dependence between age and software use? Use the 0.10 level of significance.
