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EX = 22.5 Ex2 = 64.91 (X-Xbar )? = SSX 1.63 EY = 135 EY2 = 2595 E(Y-Ybar )2 = SSY = 316.88 ny=11 ny=8 Sample mean sales is Sample standard deviation of sales is 90% confidence interval for the population mean sales (hint: assume that sales distributed normally with mean u and variance o?) is I 90% confidence interval for the population variance of sales (hint: assume that sales distributed normally with mean u and variance o) is [ to

EX = 22.5 Ex2 = 64.91 (X-Xbar )? = SSX 1.63 EY = 135 EY2 = 2595 E(Y-Ybar )2 = SSY = 316.88 ny=11 ny=8 Sample mean sales is Sample standard deviation of sales is 90% confidence interval for the population mean sales (hint: assume that sales distributed normally with mean u and variance o?) is I 90% confidence interval for the population variance of sales (hint: assume that sales distributed normally with mean u and variance o) is [ to

Algebra & Trigonometry with Analytic Geometry
Algebra & Trigonometry with Analytic Geometry
13th Edition
ISBN:9781133382119
Author:Swokowski
Publisher:Swokowski
Chapter7: Analytic Trigonometry
Section7.2: Trigonometric Equations
Problem 97E
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A world wide fast food chain decided to carry out an experiment to assess the influence of advertising expenditure (X) on sales (Y) or vice versa. The table shows, for 8 randomly selected countries, percentage increase in advertisement expenditure (X) and percentage increase in sales (Y) collected. The data presented in the following table are the sums and sum of squares. (use 2 digits after decimal point) EX = 22.5 Ex? = 64.91 5(X-Xbar )? = SSX = 1.63 SY = 135 EY2 = 2595 E(Y-Ybar )? = SSY = 316.88 nx=11 ny=8 Sample mean sales is Sample standard deviation of sales is 90% confidence interval for the population mean sales (hint: assume that sales distributed normally with mean u and variance o?) is [ + 90% confidence interval for the population variance of sales (hint: assume that sales distributed normally with mean u and variance o) is [ to
Transcribed Image Text:A world wide fast food chain decided to carry out an experiment to assess the influence of advertising expenditure (X) on sales (Y) or vice versa. The table shows, for 8 randomly selected countries, percentage increase in advertisement expenditure (X) and percentage increase in sales (Y) collected. The data presented in the following table are the sums and sum of squares. (use 2 digits after decimal point) EX = 22.5 Ex? = 64.91 5(X-Xbar )? = SSX = 1.63 SY = 135 EY2 = 2595 E(Y-Ybar )? = SSY = 316.88 nx=11 ny=8 Sample mean sales is Sample standard deviation of sales is 90% confidence interval for the population mean sales (hint: assume that sales distributed normally with mean u and variance o?) is [ + 90% confidence interval for the population variance of sales (hint: assume that sales distributed normally with mean u and variance o) is [ to
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