You may need to use the appropriate appendix table or technology to answer this question. Given are five observations fo

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You may need to use the appropriate appendix table or technologyto answer this question. Given are five observations for twovariables, x and y. (Round your answers to two decimal places.) xi3 12 6 20 14 yi 55 40 55 10 15 (a) Estimate the standard deviationof ŷ* when x = 7. (b) Develop a 95% confidence interval for theexpected value of y when x = 7. to (c) Estimate the standarddeviation of an individual value of y when x = 7. (d) Develop a 95%prediction interval for y when x = 7.