MATH 533 WEEK 7 COURSE PROJECT PART C, REGRESSION AND CORRELATION
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Course
MATH 533
Institution
MATH 533
MATH 533 Week 7 Course Project Part C: Regression and Correlation Analysis
Using Minitab, perform the regression and correlation analysis for the data on SALES (Y) and CALLS (X) by answering the following questions.
Generate a scatterplot for SALES versus CALLS, including the graph of the bes...
Sales I is I the I dependent I variable, I Calls I is I the I independent I variable. I The I trend I is I as I the
I callsIincrease Iso Idoes Ithe Isales.
6. Based Ion Iyour Ifindings Iin I1–5, Iwhat Iis Iyour Iopinion Iabout Iusing ICALLS Ito Ipredict ISALES?
Explain. IIn Imy Iopinion Iit Iis Ia Igood Iidea Iyou Iuse Icalls Ito Ipredict Isales Ibased Ion Ithe Idata II Ihave
Iresearched. I I IThe Ifitted Iline Iplot Ishows Ius Ithat Ias Ithe Inumber Iof Icalls Iwent Iup Iso Idid Ithe Isales.
7. Compute Ithe I95% Iconfidence Iinterval Ifor Ibeta-1 I(the Ipopulation Islope).
Interpret Ithis Iinterval. I I Iam I95% Iconfident Ithat Ifor Ieach Iadditional Icall Ithat Ithe Iaverage Isales
Iwill Igo Iup Ibetween I0.17898 Iand I0.2245
.
8. Using Ian Iinterval, Iestimate Ithe Iaverage Iweekly Isales Ifor Iweekly Icalls Ithat Iare I150.
Interpret Ithis Iinterval. II Iam I95% Iconfident Ithat Ithe Imean Iweekly Isales Ifor Ithe Iweekly Icalls Iof I150
Iare Ibetween I39.41 Iand I40.40.
9. Using Ian Iinterval, Ipredict Ithe Iweekly Isales Iwhen Iweekly Icalls Iare I150.
, Interpret I this I interval. I I I am I 95% I confident I that I if I weekly I calls I are I 150 I the I weekly I sales I will
I beIbetween I35.79 Iand I44.01.
10. What Ican Iwe Isay Iabout Ithe Iweekly Isales Iwhen Iweekly Icalls Iare I300?
Explain I your I answer. I We I cannot I make I a I prediction I because I it I is I outside I the I rage I of I values I of
I ourIindependent Ivariable.
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