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- 30-Find the calculation value required to test whether there is a difference between the amount of products produced in A and B machines at a significance level of 0.05 (KW) a) 0.9 B) 2,5 NS) 9.1 D) 4.3Given a 95% C.I. = (34.14 mm, 36.02 mm) for a sample of Wooly Bear caterpillar lengths (preceding problem), address the following. Based upon the above information, I am _____ % confident that the 95% C.I. contains the sample mean.a random sample of n = 25 individuals is selected from a population with u = 20 and a treatment administered to each individual in the sample. After treatment the sample mean is found to be m =22.2 with SS =384. a) how much difference is there between the mean for the treated sample and the mean for the original population? (Note: in a hypothesis test this value forms the numerator of the drastic). b) if there is no treatment effect how much difference is expected between the sample mean and is population mean? That is to find the standard error for m. c) based on the sample data does a treatment have a significant effect? use a two tailed test with (x = 0.05.
- A random sample of n = 25 individuals is selected from a population with μ = 20, and a treatment is administered to each individual in the sample. After treatment, the sample mean is found to be M = 22.2 with SS = 384. a. How much difference is there between the mean for the treated sample and the mean for the original population? (Note: In a hypothesis test, this value forms the numerator of the t statistic.) c. Based on the sample data, does the treatment have a significant effect? Use a two-tailed test with α = .05.The mean ±1 sd of ln [calcium intake (mg)] among 25 females, 12 to 14 years of age, below the poverty level is 6.56 ± 0.64. Similarly, the mean ± 1 sd of ln [calcium intake (mg)] among 40 females, 12 to 14 years of age, above the poverty level is 6.80 ± 0.76.What is the appropriate procedure to test for a significant difference in means between the two groups?1. Per the CDC article, men have higher blood pressure than women. Is this also true for this wholesale distribution center population? Use 0.05. Determine whether your (NEW) sample provides statistical evidence that this company’s population of adults has men with a higher blood pressure than women. Set alpha at 0.05 just focus on the Systolic number.
- In a hypothetical scenario, the National Institute of Standards and Technology has received a new replica of The Kilogram. It is weighed five times. The measurements are as follows, in units of micro-grams above 1 kg: 114.3, 82.6, 136.4, 126.8, 100.7. a) Is it possible to estimate the uncertainty in these measurements? If so, estimate it. If not, explain why not. b) Is it possible to estimate the bias in these measurements? If so, estimate it. If not, explain why not.In a test of H0: p = .43 versus Ha: p ≠ .43, a sample of size 1500 leads to a p-value of 0.087. Which of the following must be true if a = 0.05? A. The Ho should be rejected at the 5% level B. The Ho should fail to be rejected at the 5% level C. The Ho should be accepted at the 5% levelTwo separate samples receive two different treatments. The first sample has n=9 with M=50 and SS=710. And the second sample has n=6 with M=37 and SS=460. Are there significant treatment differences between these two samples? Use a=.05
- An investigator wants to estimate caffeine consumption in high school students. How many students would be required to estimate the proportion of students who consume coffee? Suppose we want the estimate to be within 5% of the true proportion with 95% confidence. Alpha = ________ Z= ________ p= ________ E = ________ n= ________For the test:H0:μ1=μ2 vs Ha:μ1>μ2 , it was found based on samples n1=7 and n2=6 , a tc=3.5 then, with a significance level of 5% it can be stated that:a) μ1 =μ2b) μ1 >μ2c) it is not true that μ1 =μ2d) it is not true that μ1 >μ2Assume 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.
