t test (1 and 2 sample) Hypothesis Test Cookie Activity (AP Stats and Stats)

11.5: The Summary of Hypothesis Testing for One Parameter

A sample mean, sample size, and sample standard deviation are provided below. Use the one-mean t-test to perform the required hypothesis test at the 1% significance level.\x̅ = 18, s = 7, n = 15, H0: μ = 20, Ha: μ < 20Click here to view a partial table of values of tα.The test statistic is t = (Round to two decimal places as needed.)The P-value is the null hypothesis. The data sufficient evidence to conclude that the mean is