Solution :
This is the two tailed test .
The null and alternative hypothesis is ,
H0 : = 50
Ha : 50
= 0.01
/ 2 = 0.01 /2 = 0.005
t0.005,19 = +/-2.861
Critical values are : -2.861 , +2.861
Test statistic = t
= ( - ) / s / n
= (55 - 50) / 20 / 20
= 1.12
Test statistic < critical value
Reject the null hypothesis .
n = 20
df = 19
P-value = 0.2767
Consider the hypotheses below. Ho : μ-50 H1 : μ # 50 Given that X-55, s-20,...
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