Question

Question 23 1 pts I claim that a soda machine dispenses on average exactly 12 ounces of soda. I want to test this claim at a significance level of a - .05, using the following data: n = 81 sample mean - 12.2 oz. s = 0.9 oz. What is the value of the test statistic? (Do not round) Question 24 1 pts I claim that my soda machine dispenses on average more than 12 ounces of soda. Test this claim at a significance level of a = .05, using the following data: n=81 average - 12.2 oz. s = 2.4 oz. What is the z-critical value for the rejection region?

Answer 1

Question 23

Test statistic =

Vn(T-)/S= V81(12.2 - 12)/0.9 = 2

where, population mean:

12

sample mean:

T= 12.2

n = 81
and  
S=0.9

Value of test statistic = 2

Question 24

level of significance :

g= 0,05

Since, here we perform a one-tail test

Therefore, z-critical value for the rejection region = ( calculated from standard normal table)

Ta = T0.05 1.645

Therefore, z-critical value for the rejection region is 1.645

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