Calculate the t test stat for testing the claim the average waiting time is more than 20 minutes also find the pvalue for testing the claim by entering probability t distribution df=99>test stat into wolframalpha.com for example if your test is 1,2 enter probability t distribution df=99>1.2 into wolframalpha.com Note that in question you use wolframalpha.com , You might not have access to wolframalpha,com in the exam but you do have access to the t table, using the t table t,0.05,99 =1.66 so you know the Pvalue will be less than 0.05 if the test stat is more than 1.66 a. the Pvalue is 0.01 b. the Pvalue is -0.09 c. the test stat is 2.44 d. the test stat is 2.54
suppose in a sample of 100 customer the average waiting time is 22.54 minutes
with a standard deviation of 10 minutes
Calculate the t test stat for testing the claim the average waiting time is more than 20 minutes
also find the pvalue for testing the claim by entering
probability t distribution df=99>test stat
into wolframalpha.com
for example if your test is 1,2
enter
probability t distribution df=99>1.2 into wolframalpha.com
Note that in question you use wolframalpha.com , You might not have access to wolframalpha,com in the exam but you do have access to the t table,
using the t table t,0.05,99 =1.66
so you know the Pvalue will be less than 0.05 if the test stat is more than 1.66
It is given that
Sample mean, x̄ = 22.54
Population mean, μ = 20
Standard deviation, s = 10
Sample size, n = 99
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