1. 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. test the claim at a 5% level of significance. what is your conclusion?

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..

what's that