a. Is the sampling dependent or independent in this study? Justify your answer.b. Test the hypothesis at α = 0.05. Using the critical value approach, include all key steps of test ofhypothesis. Are women more flexible than men? To answer this question, a physical therapist measured the flexibility of 15randomly selected women and 20 randomly selected men by determining the number of inches subjects couldreach while sitting on the floor with their legs straight out and back perpendicular to the ground. The moreflexible an individual is, the more they can reach from the seated position. The physical therapist obtained thefollowing data:GenderWomenMenSample Size1520Mean (in inches)20.8618.43SD (in inches)2.113.16Assume that both population distributions are approximately normal and that the population variances are NOTequal.

a. The sampling in this study is independent. The physical therapist measured the flexibility of 15…

women more flexible than men? To answer this question, a physical therapist measured the flexibility of 15 domly selected women and 20 randomly selected men by determining the number of inches subjects could ch while sitting on the floor with their legs straight out and back perpendicular to the ground. The more cible an individual is, the more they can reach from the seated position. The physical therapist obtained the owing data: ender Women Ien Sample Size 15 20 Mean (in inches) 20.86 18.43 SD (in inches) 2.11 3.16 sume that both population distributions are approximately normal and that the population variances are NOT nal.

women more flexible than men? To answer this question, a physical therapist measured the flexibility of 15 domly selected women and 20 randomly selected men by determining the number of inches subjects could ch while sitting on the floor with their legs straight out and back perpendicular to the ground. The more cible an individual is, the more they can reach from the seated position. The physical therapist obtained the owing data: ender Women Ien Sample Size 15 20 Mean (in inches) 20.86 18.43 SD (in inches) 2.11 3.16 sume that both population distributions are approximately normal and that the population variances are NOT nal.

MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

Section: Chapter Questions

Problem 1P

See similar textbooks

Similar questions

The critical boundaries for a hypothesis test are z = +1.96 and -1.96. If the z-score for the sample data is z =-1.90, what is the correct statistical decision? Reject H0 Fail to reject H1 Reject H1 Fail to reject H0
An accountant is studying how much American families donate each year to charity. The accountant states the average yearly amount donated to charity by American families is different than 5.5 thousand dollars. If we would like to test the accountant's claim with a hypothesis test using a significance level of α=0.01 , what is the rejection region? Use the graph below to show the rejection region. First, move the blue dot to choose the appropriate test (left-, right, or two- tailed). Then, slide the shaded region(s) to represent the rejection region.
Use the given information to find the P-value. Also, use a 0.05 significance level and state theconclusion about the null hypothesis (reject the null hypothesis or fail to reject the null hypothesis).With H1: p (does not equal) 3/5, the test statistic is z = 0.78
The displays provided from the technology available below result from using data for a smartphone carrier's data speeds at airports to test the claim that they are from a population having a mean less than 6.00 Mbps. Conduct the hypothesis test using these results. Use a 0.05 significance level. Identify the null and alternative hypotheses, test statistics, and P-value, and state the final conclusion that addresses the original claim. T-Test μ<6.00 t=−3.552993 p=0.000427 x=5.35 Sx=1.293612 n=50 Question content area bottom Part 1 Assuming all conditions for conducting a hypothesis test are met, what are the null and alternative hypothese
Let's examine the mean of the numbers 1, 2, 3, 4, 5, 6, 7, and 8 by drawing samples from these values, calculating the mean of each sample, and then considering the sampling distribution of the mean. To do this, suppose you perform an experiment in which you roll an eight-sided die two times (or equivalently, roll two eight-sided dice one time) and calculate the mean of your sample. Remember that your population is the numbers 1, 2, 3, 4, 5, 6, 7, and 8. The true mean (p) of the numbers 1, 2, 3, 4, 5, 6, 7, and 8 is The number of possible different samples (each of size n = 2) is the number of possibilities on the first roll (8) times the number of possibilities on the second roll (also 8), or 8(8) = 64. If you collected all of these possible samples, the mean of your sampling distribution of means (HM) would equal , and the standard deviation of your sampling distribution of means (that is, the standard error or GM) would be The following chart shows the sampling distribution of the…
The test statistic of z = 0.53 is obtained when testing the claim that p > 0.5. Identify the hypothesis test as being two-tailed, left-tailed, or right-tailed. Find the P-value. Using a significance level of α = 0.05, should we reject H0 or should we fail to reject H0?
A researcher studying air quality in a metropolitan city is interested in testing the claim that less than 20% of people smoke cigarettes to test this claim the researcher collects the following data on a sample of 700 adults and 110 of them smoke cigarettes the following is the data from the study. Sample size= 700 adults Alternative hypothesis= ha:p
Shown below is a portion of a computer output for regression analysis relating y (dependent variable) and x (independent variable). ANOVA df SS Regression 1 24.061 Residual 10 67.979 Coefficients Standard Error Intercept 11.064 2.049 x −0.566 0.301 (a) What has been the sample size for the above regression analysis? (b) Perform a t-test and determine whether or not x and y are related. Let ? = 0.05. State the null and alternative hypotheses. (Enter != for ≠ as needed.) H0: Ha: Find the value of the test statistic. (Round your answer to three decimal places.) Find the p-value. (Round your answer to four decimal places.) p-value = What is your conclusion? .
Using the z table, find the critical value (or values) for an α = .09 two-tailed test.
Refer to Exercise 8.S.1. Compare the before and after populations using a t test at α = 0.05. Use a nondirectional alternative.
Test the null hypothesis that the slope is zero versus the two-sided alternative in the following setting using the alpha = 0.05 significance level: n = 30, yhat = 30.8 + 2.1x, and SEb1 = 1.05.
Provide an appropriate response. Test the hypothesis that p1 = P2. Use a = 0.05. The sample statistics listed below are from independent samples. Sample statistics: n1 = 50, x1 35, and n2 = 60, x2 = 40 Step 1) State the null and alternative hypotheses. Step 2) Determine the critical value for the level of significance, a. Step 3) Find the test statistic or P-value. Step 4) Will the researcher reject the null hypothesis or do not the null hypothesis: Step 5) Write the conclusion. HTML Editor BIUA A、IE三= Ex x E 曲。 12pt Pa SAMSUNG 10