Dear Experts, Please help me to solve this Thanks · shown in the table below Ave

Question

Dear Experts,
Please help me to solve this
Thanks

· shown in the table below Average length, L Year (t (in minutes) 2.38 2.56 2.74 2.73 2.87 3.05 2009 2010 20112-49 2012 2013 2014 PART B. 1.82 minutes A. Use linear regression to determine a linear 264 minutes model (equation) for the data. CD 3.39 minutes B. Let I represent the year, with 1 = 9 corresponding to 2009. Use the linear regression model to predict the average lengths of cellular phone calls for the year 2017. Round your answer to two decimal places. 4.63 minutes 5.82 minutes

Explanation / Answer

(a)

Using R,

with t = 9, 10, 11, 12 ,13, 14 and given values of l,

the estimated linear regression model is:

l = 1.31867 + 0.122 * t

(b)

Using the linear regression found above, for t = 17,

l = 1.31867 + 0.122 * 17 = 3.39267

Rounding to 2 decimal places,

estimated l = 3.39

Hence, the answer is - C (3.39 minutes)

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