2. A pet association claims that the mean annual costs of food for dogs and cats are the same. The results for samples of the two types of pets are shown in the following table. On wished to test the claim. Assume both populations follow normal distributions Dogs Cats n2 = 18 I2= 203 21 - 16 T= 239 S1 = 32 82 =28 with equal variances. Which of the following formula should be used to calculate the standardized test statistic? (a) Z = (71-52)-Do (E1-2)-Do (b) Z = (c) T (1-ö2)-Do 111+11g -2 (d) T d-Do sp/Vn (e) Z = *-HO
2. A pet association claims that the mean annual costs of food for dogs and cats are the same. The results for samples of the two types of pets are shown in the following table. On wished to test the claim. Assume both populations follow normal distributions Dogs Cats n2 = 18 I2= 203 21 - 16 T= 239 S1 = 32 82 =28 with equal variances. Which of the following formula should be used to calculate the standardized test statistic? (a) Z = (71-52)-Do (E1-2)-Do (b) Z = (c) T (1-ö2)-Do 111+11g -2 (d) T d-Do sp/Vn (e) Z = *-HO
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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Transcribed Image Text:2. A pet association claims that the mean annual costs of food for dogs and cats are the
same. The results for samples of the two types of pets are shown in the following table.
On wished to test the claim. Assume both populations follow normal distributions
Dogs
Cats
21 - 16
T1= 239
n2 = 18
Iz= 203
S1 = 32
82 =28
with equal variances. Which of the following formula should be used to calculate the
standardized test statistic?
(a) Z =
(21-32)- Do
lu A
n2
= (E1-2)-Do
(b) Z
V n1+2
(c) T
(1-2)-Do
(21-1)a7+(n2-1)s I1
11+11タ-3
V 1'n2
(d) T =
d- Do
sp/Vn
(e) Z
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