Two samples with n, = 20, s, 8.2 and n, 15,s, = 7.6. Test if populations o, o, at a= 0.05 level of significance. %3D %3D %3D %3D
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- #59. Two independent samples with X, = 5.1, s, = 1.2,n, 20 and x, =4.6, s, =1.5, n, 20. %3D %3D %3D Test if populations 4, > H, at a = 0.01 level of significance.Quiz: Week 3 Quiz X a Recall that for normally https://fiu.instructure.com/courses/1805 X C Solved Recall that for no X CD Question 2: Recall that for normally- distributed data, 50% of Z-score values lie between -0.6745 and +0.6745. Compute 1.5 XIQR for the normal distribution of Z-score values. Round your answer to two decimal places.
- A physical therapist wanted to know whether the mean step pulse of men was less than the mean step pulse of women. She randomly selected 54 men and 70 women to participate in the study. Each subject was required to step up and down a 6-inch platform. The pulse of each subject was then recorded. The following results were obtained. Two sample T for Men vs Women N Mean StDev SE Mean Men Women 98% CI for mu Men - mu Women (- 12.20, - 1.00) T-Test mu Men = mu Women (vs H2 O C. Ho: H1 = H2; Ha: H1 #H2 (b) Identify the P-value and state the researcher's conclusion if the level of significance was a = 0.01. What is the P-value? P-value =10:12 AA www-awn.aleks.com O REGRESSION AND CORRELATION Linear relationship and the.. Shasia v Below are four bivariate data sets and the scatter plot for each. (Note that each scatter plot is displayed on the same scale.) Each data set is made up of sample values drawn from a population. 1.0 1.0 1.0 7.0 2.0 2.0 2.0 8.9 3.0 3.0 3.0 7.4 4.0 4.0 4.0 5.4 5.0 5.0 5.0 8.5 6.0 6.0 6.0 | 5.1 7.0 7.0 7.0 4.2 8.0 8.0 8.0 | 7.1 9.0 9.0 Figure 1 10.0 10.0 9.0 6.2 Figure 2 10.0 3.8 w m |1.0 8.0 2.0 5.1 3.0 10.0 1.0 3.5 2.0 4.5 3.0 3.2 4.0 5.1 4.0 | 6.3 5.0 4.5 5.0 2.3 6.0 | 7.4 6.0 | 4.7 7.0 6.1 7.0 9.3 8.0 3.7 9.0 9.1 Figure 4 8.0 7.6 9.0 6.6 Figure 3 10.0 8.3 10.0 6.8 Answer the following questions about the relationships between pairs of variables and the values ofr, the sample correlation coefficient. The same response may be the correct answer for more than one question. 1. Which data set indicates the strongest positive linear relationship between its two variables? Choose one 2. Which data…Suppose IQ scores were obtained for 20 randomly selected sets of couples. The 20 pairs of measurements yield x = 101.16, y = 102.3, r= 0.810, P-value = 0.000, and y = 23.09+0.78x, where x represents the IQ score of the wife. Find the best %3D %3D %3D predicted value of y given that the wife has an IQ of 109? Use a significance level of 0.05. Click the icon to view the critical values of the Pearson correlation coefficient r. .... The best predicted value of y is . (Round to two decimal places as needed.) Critical values of the pearson correlation coefficient r NOTE: To test Ho: p = 0 against H,: p#0, reject Ho |if the absolute value of r is greater than the critical value in the table. a = 0.05 a = 0.01 4 0.950 0.990 0.878 0.959 0.811 0.917 0.754 0.875 0.707 0.834 0.666 0.798 10 0.632 0.765 11 0.602 0.735 12 0.576 0.708 13 0.553 0.684 14 0.532 0.661 15 0.514 0.641 16 0.497 0.623 17 0.482 0.606 18 0.468 0.590 19 0.456 0.575 20 0.444 0.561 25 0.396 0.505 30 0.361 0.463 35 0.335 0.430 40…
- 1The corrosive effects of various soils on coated and uncoated steel pipe was tested by using a dependent sampling plan. The data collected are summarized below, where d is the amount of corrosion on the coated portion subtracted from the amount of corrosion on the uncoated portion. Does this random sample provide sufficient reason to conclude that the coating is beneficial? Use a = 0.01 and assume normality. n- 40, Σd- 207, Σα? = 6199 (a) Find t. (Give your answer correct to two decimal places.) (ii) Find the p-value. (Give your answer correct to four decimal places.) (b) State the appropriate conclusion. O Reject the null hypothesis, there is significant evidence that the coating is beneficial. Reject the null hypothesis, there is not significant evidence that the coating is beneficial. Fail to reject the null hypothesis, there is significant evidence that the coating is beneficial. Fail to reject the null hypothesis, there is not significant evidence that the coating is beneficial.thill An experiment compares two different processes for producing steel plate. The measurements represent the thickness of the plate. The samples gave m = 8, X = 6.701, S1 = 0.108 n = 6, Y = 6.841, S2 = 0.155 %3D %3D Assume that the two populations are normal with equal variances, test Ho: H1 - H2 = 0 against H1 : µ1 - µ2#0 at a 0.05 significance level. 5.
- can you please provide explanationsMatch the definition in column X with the correct term in column Y.The following information represents chlorine residuals in swimming pool (y) and the testing time (y) in different hours: n = 6, Ey = 8.8, Ey = 18.68, Ex = 42, Ex2 = 364, and Exy = 48.6 The sample correlation coefficient is: -0.6467 - 0.9899 - 0.9088 0.6467