A market researcher is studying online subscription services. She is particularly interested in what variables relate to the number of subscriptions for a particular online service. Sample information on 25 online subscription services was gathered. (Use Data down below)Report the summary output and residual output and comment on whether all the variables should be kept as regressors.Plot the residuals in a histogram. Comment on whether they appear to follow a normal distribution.Plot the fitted values against the residuals. Does this plot satisfy the assumption of randomness?DATA ServiceSubscriptionsWeb Page HitsAdvPrice137.95588.913.235.1237.66585.313.234.7337.55566.319.834.8438.78642.917.635.1537.67624.217.634.6638.23603.915.434.8736.9571.91134.7838.28584.328.635.3938.9560528.635.11039.27676.317.635.61138.3587.417.634.91238.84576.42235.41338.14570.817.6351438.39586.515.435.51537.295441134.91639.15611.124.2351738.29643.317.635.31838.09635.619.834.81937.83598.915.435.12039.376572235.32137.81595.215.435.12237.4252019.835.12338.83629.62235.32438.3368024.234.72540.24651.23335.8

Concept: Multiple Regression Model has to be fitted for the above problem. Let us define the…

Answered: A market researcher is studying online…

MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

Section: Chapter Questions

Problem 1P

See similar textbooks

Related questions

Question

100%

A market researcher is studying online subscription services. She is particularly interested in what variables relate to the number of subscriptions for a particular online service. Sample information on 25 online subscription services was gathered. (Use Data down below)

Report the summary output and residual output and comment on whether all the variables should be kept as regressors.
Plot the residuals in a histogram. Comment on whether they appear to follow a normal distribution.
Plot the fitted values against the residuals. Does this plot satisfy the assumption of randomness?

DATA

Service	Subscriptions	Web Page Hits	Adv	Price
1	37.95	588.9	13.2	35.1
2	37.66	585.3	13.2	34.7
3	37.55	566.3	19.8	34.8
4	38.78	642.9	17.6	35.1
5	37.67	624.2	17.6	34.6
6	38.23	603.9	15.4	34.8
7	36.9	571.9	11	34.7
8	38.28	584.3	28.6	35.3
9	38.95	605	28.6	35.1
10	39.27	676.3	17.6	35.6
11	38.3	587.4	17.6	34.9
12	38.84	576.4	22	35.4
13	38.14	570.8	17.6	35
14	38.39	586.5	15.4	35.5
15	37.29	544	11	34.9
16	39.15	611.1	24.2	35
17	38.29	643.3	17.6	35.3
18	38.09	635.6	19.8	34.8
19	37.83	598.9	15.4	35.1
20	39.37	657	22	35.3
21	37.81	595.2	15.4	35.1
22	37.42	520	19.8	35.1
23	38.83	629.6	22	35.3
24	38.33	680	24.2	34.7
25	40.24	651.2	33	35.8

Features Features Normal distribution is characterized by two parameters, mean (µ) and standard deviation (σ). When graphed, the mean represents the center of the bell curve and the graph is perfectly symmetric about the center. The mean, median, and mode are all equal for a normal distribution. The standard deviation measures the data's spread from the center. The higher the standard deviation, the more the data is spread out and the flatter the bell curve looks. Variance is another commonly used measure of the spread of the distribution and is equal to the square of the standard deviation.

Expert Solution

Step by step

Solved in 4 steps with 4 images

SEE SOLUTION Check out a sample Q&A here

Knowledge Booster

$Anova and Design of Experiments$

Learn more about

Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, statistics and related others by exploring similar questions and additional content below.

Similar questions