Shar ple Linear Correlation & regression 11:59 PM EDT Following is a portion of

Question

Shar ple Linear Correlation & regression 11:59 PM EDT Following is a portion of the regression output for an application relating maintenance expense (dollars per month) to usage (hours per week) for a particul computer terminal. Excel File: data14-41.xs NOVA Regression Residual Total 1575.76 49.14 1924.90 Coofficienls Standard ErrerStat Intercept Usage 6 1092 0.8951 9361 149 If your answer is zero, enter" a. Write the estimated regression equation (to 4 decimals) y -6.1092+0.8951x b. Use a t test to determine whiether morthly mainterance expense is relatéd to usage at the :05 level of significance (to 2 decimais, if necessary) 6.0073 value= 0.0003 17 MacBook Air

Explanation / Answer

a.

y = 6.1092 + 0.8951x

b. Here

t = 6.1092/0.9361 = 6.5262

p - value will be calculaed with help of dF which is n- 2 = 8 and significance level = 0.05

p- value = TDIST (t > 6.5262 ; 8) = 0.0002

The regression is significant here.

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