Test whether the correlation from question 1 is statistically significant (i.e., significantly different from 0). Report the df and p-value of the test. ID Alcohol (x) Tobacco (y) xy x^2 y^2 1 6.47 4.03 26.0741 41.8609 16.2409 2 6.13 3.76 23.0488 37.5769 14.1376 3 6.19 3.77 23.3363 38.3161 14.2129 4 4.89 3.34 16.3326 23.9121 11.1556 5 5.63 3.47 19.5361 31.6969 12.0409 6 4.52 2.92 13.1984 20.4304 8.5264 7 5.89 3.2 18.848 34.6921 10.24 8 4.79 2.71 12.9809 22.9441 7.3441 9 5.27 3.53 18.6031 27.7729 12.4609 10 6.08 4.51 27.4208 36.9664 20.3401 11 4.02 4.56 18.3312 16.1604 20.7936 Total 59.88 39.8 217.7103 332.3292 147.493

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Suppose, household color TVs are replaced at an average age of ? = 7.8 years after purchase, and the (95% of data) range was from 3.8 to 11.8 years. Thus, the range was 11.8 − 3.8 = 8.0 years. Let x be the age (in years) at which a color TV is replaced. Assume that x has a distribution that is approximately normal.   (a) The empirical rule indicates that for a symmetric and bell-shaped distribution, approximately 95% of the data lies within two standard deviations of the mean. Therefore, a 95% range of data values extending from ? − 2? to ? + 2? is often used for "commonly occurring" data values. Note that the interval from ? − 2? to ? + 2? is 4? in length. This leads to a "rule of thumb" for estimating the standard deviation from a 95% range of data values. Estimating the standard deviationFor a symmetric, bell-shaped distribution, standard deviation ≈ range 4 ≈ high value − low value 4 where it is estimated that about 95% of the commonly occurring data…

Positive autocorrelation in control charts has which of the following characteristics?  A. Is observed when large values follow large values  B. Can cause high false-negative rates for special cause variation  C. Is seen when large values follow small values  D. Is a rare occurrence with measurements of a same patient or provider over time

You are conducting a study to see if the proportion of women over 40 who regularly have mammograms is significantly different from 0.6.With H1 : p ≠ 0.6 you obtain a test statistic of z=-2.971.Use a normal distribution calculator and the test statistic to find the P-value accurate to 4 decimal places. It may be left-tailed, right-tailed, or 2-tailed.   P-value=

Use the following ANOVA table for regression to answer the questions. Response: Y Source DF Sum Sq Mean Sq F-value Pr(>F) Regression 1 10.964 10.964 3.02 0.083 Residual Error 342 1241.460 3.630     Total 343 1252.424           Give the F-statistic and p-value.Enter the exact answers.The F-statistic is Enter your answer; F-statistic .The p-value is Enter your answer; p-value .     Choose the conclusion of this test using a 5% significance level. Reject H0. The model is not effective. Do not reject H0. We did not find evidence that the model is not effective. Reject H0. The model is effective. Do not reject H0. We did not find evidence that the model is effective.

ed weight (in kg) and total serum cholesterol (TSC in mg/dl) data for five men (n = 5). They tested for association between weight and TSC at 5% level of significance. weight, X TSC, Y X*X Y*Y X*Y 37 2.9 1369 8.41 107.3 50 0.7 2500 0.49 35.0 67 3.3 4489 10.89 221.1 70 4.2 4900 17.64 294.0 57 3.8 3249 14.44 216.6 SUM: 281 14.9 16507 51.87 874.0 What are the Null and Alternate hypotheses for this test? Clearly label your answers as HỌ or H1. (Do not use a numerical format. Both of your statements must be in sentence form, and say something about the weight

One group of accounting students took a distance learning class, while another group took the same course in a traditional classroom. At α = .10, is there a significant difference in the mean scores listed below?  Exam Scores for Accounting Students Statistic Distance Classroom Mean scores x¯1x¯1 = 9.7 x¯2x¯2 = 10.0 Sample std. dev. s1 = 2.7 s2 = 2.9 Number of students n1 = 23 n2 = 23   Specify the decision rule. (Round your answers to 3 decimal places. A negative value should be indicated by a minus sign.) Find the test statistic tcalc. (Round your answer to 4 decimal places. A negative value should be indicated by a minus sign.) Use Excel to find the p-value. (Round your answer to 3 decimal places.)

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