1/4(2x+8) -1/5(15x-25)H=25.5
2 answers:
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Answer:
reject H0
Step-by-step explanation:
Given that a researcher is testing the claim that adults consume an average of at least 1.85 cups of coffee per day.
A sample of 35 adults shows a sample mean of 1.70 cups per day with a sample standard deviation of 0.4 cups per day.
(right tailed test at 5% level of significance)
Test statistic t = mean difference/std error =
df = 34
t critical = -1.697
Since our test statistic < t critical we reject null hypothesis..