Answered: iii. What is the degree of freedom for…

MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

Section: Chapter Questions

Problem 1P

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Question

Tasty Pizza Ltd desires to know if the size of the pizzas order by their customers depends on the
toppings chosen. Data was gathered for the last 300 customers and the results obtained using
MINITAB are shown below:
Exhibit 3
Expected counts are printed below observed counts
Small Medium Large All
Cheese
23 32 34
26.403 31.743 30.853 89
Tuna
34 35 36
31.150 ** 36.400 105

Pepperoni
32 40 34
31.447 37.807 36.747 *
All 89 107 104 300
Chi-sq = 0.43868 + *** + 0.76168 +
0.260754+ 0.16028 + 0.004396 +
0.009736 + 0.12725 + 0.205302 = 1.5293

iii. What is the degree of freedom for this test? [2]
iv. Estimate the p-value for this test. [1]
v. State the conclusion for the test. Give reason for your answer

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