For a population with µ = 50 and o = 10, what is the X value corresponding to z = 0.4? 50.4 O 10 O 54 O 10.4
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A: The values of y is, y 5,280 9,494 6,035 4,078 6,191 4,583 8,000 8,022 5,807
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- Repeat Example 5 when microphone A receives the sound 4 seconds before microphone B.QUESTION 16 You recently read an article about coffee that said 40% of people in your age group prefer Cold Brew, 35% prefer Latte, 4% prefer Short Black, and 21% prefer Cappuccino. You wanted to know if 125 of your friends have the same tastes as reported in the magazine, and you collect data to test your hypothesis. When testing your hypothesis, what will be your critical value? 9.35 11.14 9.49 7.82Question 13 Two possible p-values are given. Which one provides the strongest evidence against H0? p-value =0.03 or p-value =0.0007 p-value =0.03 p-value
- QUESTION 25 A clinical trial is being conducted in order to determine the efficacy of a new drug used to treat Rheumatoid arthritis. The efficacy of the medication will not only be determined by the physical improvement of symptoms but also by using a blood test to examine the concentration C-reactive protein (an inflammatory marker) in an individual’s blood. If the researcher wants a margin of error for the level of C-reactive protein to be less than or equal to 3.0 mg/dL, and if the standard deviation for C-reactive protein concentrations among arthritis patients was previously documented at 8 mg/dL, how many patients should be recruited for each group in the study assuming a 95% confidence interval will be used to quantify the mean differences between the control group and the treatment group? nfor the treatment group = 112; n for the control group = 111 nfor the treatment group = 56; n for the control group = 57 nfor the treatment group = 55; n…Review Question 5D and 5E please do both. 5D) pH of a solution: 4.5532 4.5511 4.5501 4.5545 5E) Mass of a random object: 16.3356 g 16.3359 g 16.3352 g 16.3350 gTwo samples of sizes 60 and 90 have 52 and 48 as the respective A.Ms. and 9 and 12 as the respective S.Ds. Find the A.M and S.D. of the combined sample of size 150.
- Assume that ρxy = .30 between weight and exercise for the population of normal adults. However, a researcher believes the relationship is stronger for children. The researcher tests a sample of 28 children and obtains an rxy = .47. Does this result support the researcher’s belief? Conduct an appropriate statistical test using an alpha level of .05.The result below gives the amount (mg/mL) of ephedrine hydrochloride found in pharmaceutical preparations of Ephedrine Elixir B.P. by two different methods: derivative ultraviolet spectroscopy and an official assay method (the nominal amount in each sample was 3 mg/mL). Test whether the results obtained by the two methods differ significantly.Question 1 (d) A standard method for determination of the carbon monoxide (CO) level in gaseous mixtures is known from many hundreds of measurements to have a standard deviation of 0.21 ppm CO. A moderation of the method yields a value for s of 0.15 ppm CO for pooled data set with 12 degrees of freedom. A second moderation, also based on 12 degrees of freedom, has a standard deviation of 0.12 ppm CO. Is either modification significantly more precise than the original?
- QUESTION 7 two tail test with Zcalc = 1.86. What is the p-value of the test?Question 6 The tables show critical t values, then positive and negative z scores.Question 5 Consider the diameters of cylindrical parts manufactured on a computer-controlled lathe.a) Suppose that the mean of the diameters is known to be 0.1 millimetres. Give an upper bound to the probability that the diameter of new part will exceed 0.11 mm.b) Suppose that the mean is unknown but the standard deviation is known to equal 0.002 mm. What can be said about the probability that the diameter of a new part will be within 0.006 mm of the unknown mean for that run?c) How many new parts should be made so as to ensure, with probability at least 0.75, that the average diameter would be within 0.001 mm of the unknown mean? Assume each part is made independently.
