Given the bivariate data below, what are the values of slope and y-intercept of the regression equation, respectively? X 1 2 3 4 5 6 7 y 5 1 6 7 10 7 Select one: O a. 0.893; 2.143 O b. -0.893; -2.143 Oc. 0.839; 2.134 O d. 2.143; 0.893 Oe. NO ANSWER 4
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- Find the equation of the regression line for the following data set. x 1 2 3 y 0 3 4The data for the height of women is approximately bell-shaped. If a woman’s height has a z-score of -1.3, what percentage of women is shorter than she is?Regression analysis was applied between sales data (y) and advertising data (x) and the following information was obtained. SSR = 800SST = 1250Sample Size (n) = 12 The standard error of the estimate is
- Here is a bivariate data set. Find the regression equation for the response variable y. x y 64.9 82.6 69.4 63.6 75.7 63.4 62.7 63.9 67.2 75.4 82.1 104.2 82.7 88.5 65.6 56.4 regression equation: Enter the equation in slope-intercept form with parameters accurate to three decimal places.Given the table below, Let y, x1, x2, and x3 be the time of concentration (t, in hr), watershed length (L in ft), watershed slope (S in %), and runoff curve number (CN): Evaluate the linear multiple regression model with two or three predictor variables. Compute the multiple correlation coefficient, the standard error of estimate, and the standard deviation of the variable y. Discuss the reliability of the modelA researcher believes that there is a linear association between the level of potassiumcontent (y) in milligrams and the amount of fiber (x) in grams in cereal. The regression line forthe data is computed to be: ŷ = 36+27x rate. It was also computed that r = .62 a. If a cereal has 4 grams of fiber, what is its predicted potassium content?
- The above plot: a) reveals sure evidence that the population slope is unequal to 0 b) reveals sure evidence that the sample slope is unequal to 0 c) can be used alone to reject the null hypothesisthat the population slope is unequal to 0 d) can be used alone to reject the null hypothesis that the population slope is equal to 0 e) a and c f) a and dIf Elliot collects data from a single sample and her dependent variable is assessed on a nominal scale, which of these difference tests would Elliot need to use to analyze her data? a. single sample t test b. between-subjects, one-way ANOVA. c. chi square goodness of fit test d. single-sample z testIf the regression constant is 9.1410114235and the regression coefficient is 0.90613879. Present the data in a textual manner. Just presentation; no need for calculation please. Note: A college faculty collected data on his students’ general weighted average (Y) in the first semester and their high schoolaverage grade (X).
- A set of n = 15 pairs of X and Y values has a correlation of r = +0.80 with SSY = 75, and the regression equation for predicting Y is computed. Find the standard error of estimate for the regression equation. How big would the standard error be if the sample size were n = 30.Which of the multivariate regression parameters listed below would be best interpreted as: the proportion of variation in the dependent variable explain by all the independent variables in the model. a b1 X1 R2The results of a sample of 7 data points are presented below in terms of the Average Daily Temperature (oF) and the Average Monthly Precipitation (inches): Average Daily temperature x 86 81 83 89 80 74 64 Average Monthly Precipitation y 3.4 1.8 3.5 3.6 3.7 1.5 0.2 d- Determine the regression line equation e- Plot the regression line on the scatter plot (on same graph) f- Calculate the standard error of estimate g- Find the 95% prediction interval for the 95oF average daily temperature