Are -(x-4) and -x+4 equivalent?
2 answers:
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Answer:
Step-by-step explanation:
Given that
sample size =n= 50
x bar = sample mean = 10.8
s = sample std deviation = 3.3
Mean difference = 50-10 = 40
Std error of sample = std dev / sqrt n=
Since population std dev is not known, we have to use t test
Test statistic t = Mean diff/std error =
df = 39
p value = 0.0000
Since p < 0.09 our significance level, we reject our null hypothesis.
A. There is sufficient evidence to reject Upper H 0 for alpha greater than 0.09