H0:μ=12.7H0:μ=12.7
H1:μ<12.7H1:μ<12.7
Your sample consists of 34 subjects, with a mean of 12.5 and
standard deviation of 1.42.
Calculate the test statistic, rounded to 2 decimal places.
t=t=
Ho : µ = 12.7
Ha : µ < 12.7 (Left tail
test)
sample std dev , s =
1.4200
Sample Size , n = 34
Sample Mean, x̅ =
12.5000
Standard Error , SE = s/√n = 1.42/√34=
0.2435
t-test statistic= (x̅ - µ )/SE =
(12.5-12.7)/0.2435=
-0.82
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