Using α = 0.05, test if the mean weight change is less than 0 if a sample of size 36 people on the Atkins diet yielded a mean change of -2.3 with a std deviation (s) of 4.5.
Show steps, pls
Using α = 0.05, test if the mean weight change is less than 0 if a...
4. Using a α = 0.05, test that the mean for group 1 is less than the mean for group 2. std dev (o) 10 10 group mean 50 74.8 50 81.3
Using = 0.05, test if the mean is different from 8.2 if a sample of size 36 yielded a mean of 7.4 and a sample std dev )s) od 4.
You wish to test the following claim (HaHa) at a significance level of α=0.05α=0.05. Ho:μ1=μ2Ho:μ1=μ2 Ha:μ1<μ2Ha:μ1<μ2You believe both populations are normally distributed, but you do not know the standard deviations for either. You should use a non-pooled test. You obtain a sample of size n1=16n1=16 with a mean of M1=50.7M1=50.7 and a standard deviation of SD1=7.4SD1=7.4 from the first population. You obtain a sample of size n2=12n2=12 with a mean of M2=53.7M2=53.7 and a standard deviation of SD2=18.2SD2=18.2 from the second population.What is the test statistic for this sample? (Report answer accurate to three decimal...
(a) Determine the critical value(s) for a right-tailed test of a population mean at the α=0.05 level of significance with 10 degrees of freedom. (b) Determine the critical value(s) for a left-tailed test of a population mean at the alphaαequals=0.01level of significance based on a sample size of n=20. (c) Determine the critical value(s) for a two-tailed test of a population mean at the α =0.10 level of significance based on a sample size of n=16.
z-test a sample for the null hypothesis using α = 0.05 as our threshold a) Given a population with mean of 550 and variance of 100, what would be minimum sample mean to reject the null hypothesis if our sample size is 20? b) Given a population with mean of 550 and variance of 100, what would be maximum sample mean to reject the null hypothesis if our sample size is 20? c) Let’s assume the same population mean and...
You wish to test the following claim (Ha) at a significance level of α=0.05. Ho:μ=52.8 Ha:μ≠52.8 You believe the population is normally distributed, but you do not know the standard deviation. You obtain a sample of size n=55 with mean M=54 and a standard deviation of SD=6.7. 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? (Report answer accurate to four decimal...
When 40 people use the Weight Watchers diet for one year, their mean weight loss was 3.0 pounds. Historically the standard deviation is σ = 4.9 pounds (based on data from “Comparison of the Atkins, Ornish, Weight Watchers, and Zone Diets for Weight Loss and Heart Disease Reduction,” by Dansinger, et al., Journal of the American Medical Association, Vol. 293, No. 1). Use a 0.01 significance level to test the claim that the mean weight loss is greater than 0....
13. When 40 people used the Weight Watchers diet for one year, their mean weight loss was 3.0 lb and the standard deviation was 4.9 lb. Use a 0.05 significance level to test the claim that the mean weight loss is greater than 0. Show graphing calculator command in the box below. Step 1: Claim: Step 2: Opposite of the Claim: Step 3: Ho: H: Step 4: a = 0.05 Step 5: Test Statistie: Step 6: P-value Step 7: Step...
You wish to test the following claim (Ha) at a significance level of α=0.05. Ho:μ=62.6 Ha:μ<62.6 You believe the population is normally distributed and you know the standard deviation is σ=10. You obtain a sample mean of M=59.5 for a sample of size n=33. What is the critical value for this test? (Report answer accurate to three decimal places.) critical value = What is the test statistic for this sample? (Report answer accurate to three decimal places.) test statistic =...
Suppose you want to test the claim that the mean is less than or equal to 25.6. Given a sample size of n = 40 with sample standard deviation of 2, and a level of significance of alpha = 0.05, when would you reject the null hypothesis? Select one: a. Reject null if the test statistic is greater than 1.96. b. Reject null if the test statistic is greater than 2.021. c. Reject null if the test statistic is greater...