Sample Mean is = 85 Sample SD is = 10 Sample Size is = 10 Calculations t-statistic -1.58113883 0.148304704 Decision FTR Null Wording 2: At a 95% CL I accept that the machine is working properly. (That is, no one to it”). “fix One Tailed Examples We have readjusted our machine to produce bags labeled 95g”. We have “contains sampled 10 bags and find xbar=92.0g with sd=5g. Is the machine putting in at least 95g? Use 95% CL. This is a one-tail case since we are interested in in at least 95” vs putting in at “putting “not least 95” (that is, putting in less than 95). One-Tailed (Right Tail) Hypotheses Ho: <= 95 μ H1: > 95 μ
Sample Mean is = 85 Sample SD is = 10 Sample Size is = 10 Calculations t-statistic -1.58113883 0.148304704 Decision FTR Null Wording 2: At a 95% CL I accept that the machine is working properly. (That is, no one to “fix it”). One Tailed Examples We have readjusted our machine to produce bags labeled “contains 95g”. We have sampled 10 bags and find xbar=92.0g with sd=5g. Is the machine putting in at least 95g? Use 95% CL. This is a one-tail case since we are interested in “putting in at least 95” vs “not putting in at least 95” (that is, putting in less than 95). One-Tailed (Right Tail) Hypotheses Ho: μ <= 95 H1: μ > 95
Notes10.docx