In a partially destroyed laboratory record of analysis of correlation data the following results only are legible. O=9, 8X – 10Y+ 66=0; 40X – 18Y = 214. %3D What were (i) The mean values of X and Y. (ii) o
Q: O a.r = -0.2548 O b.r = -0.9382 O c.r= 0.9963 O d.r= 0.0767
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A: Formula for correlation coefficient : r = 1n-1∑xi-x¯sxyi -y¯sy
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Q: An aerobic exercise instructor remembers the data given in the following table, which shows the…
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Q: Which value is the correlation coefficient(r) of the following data? r | -2 | -1 | 0 | 1 | 2 |3 -2…
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- A scatterplot is made of the average height (x axis) and average blood temperature (y axis) of 200 different mammals. The correlation is medially positive, approximately around r = 0.6. Human is at the 2 SD below the average on height and approximately 1.2 SD below the average on blood temperature. This implies this point is... Group of answer choices No answer text provided. on the SD line it is impossible to say with the information given on the regression lineBelow is data for two variables, X and Y. Answer the questions that follow. X Y X-MX Y-MY (X-MX)2 (Y-MY)2 (X-MX)(Y-MY) 3 3 -2 -1 4 1 2 4 3 -1 -1 1 1 ___ 6 4 1 ___ 1 0 0 7 6 2 2 ___ 4 4 Positive or negative correlation?Suppose the correlation coefficient r=0.16 Find:a. The coefficient of determination r2= (round to 3 decimal places)b. The percentage of explained variation = % (round to 1 decimal place)c. The percentage of unexplained variation = % (round to 1 decimal place)
- Compute the Correlation Coefficient for the data displayed in the table below: x 24 31 38 27 33 y 63 72 79 65 73 Round your final decimal answer to three decimal places (round to the nearest thousandth) Correlation Coefficient = [cc] = _______________The table below lists the mean systolic blood pressure during surgery (mmHg) along with blood loss (ml). Use this table to answer the next three (3) questions . BP Blood Loss 95274 90 170 Strength of Relationship 125 352 105317 weak moderate 110 171 105 150 90 245 90 120 none none 1/4 * 1/2; 3/4 13. Does the correlation coefficient indicate a strong linear correlation ? ( A) Yes ( B) No 14. Approximately what blood loss would you predict for a blood pressure reading of 140 ( A) 319 (B) 363 ( C) 401 ( D) 635 15. Do these data provide sufficient evidence , at the 0.05 level of significance , to indicate that the two variables are indeed correlated ?1945 is paired with cancer rates for 1975. The cigarette consumption data is from 1945 to 1975 in 5-year increments. There is a strong positive linear association between annual cigarette consumption and lung cancer rates. The correlation is 0.81. If we use the line to make predictions of the number of lung cancer deaths per 100,000 people, which of the following is an example of extrapolation? a. Predict Y when cigarette consumption is 3,500 cigarettes per person. b. Predict Y when cigarette consumption is 3,800 cigarettes per person. c. Predict Y when cigarette consumption is 4,600 cigarettes per person.
- Q9Which of the following values represents the weakest correlation between two variables? о г= -0.17 г= 0.07 K r=0.45 r=-0.62 r = 0.81 00000Match the linear correlation coefficient to the scatter diagram. The scales on the x- and y-axis are the same for each scatter diagram. (a) r= 0.523, (b)r=1, (c) r=0.787 (a) Scatter diagram (b) Scatter diagram Explanatory (c) Scatter diagram II Explanatory .......... Explanatory Click to select your answer(s). 9ME acer
- Consider the following table of data. 2 3 4 y 1 1 1 1.1 (a) Calculate the correlation coefficient. (b) Sketch a graph of the data. (c) Based on how closely the data fits a straight line, is your answer to part (a) surprising? Discuss the extent to which the correlation coefficient describes how well the data fit a horizontal line.As temperature decreases, rates of crime also seem to decrease. Which of the following Pearsons R values represents the strongest possible correlation between these two variables?" -0.5 -1 0.5 1Please answer each item with the following
