Question

subject: a/ b/ c/ d/ e/ f/ g
before: 175/166/164/ 151/189/180/177
after: 167/196/193/163/183/170/194

using a 0.01 level of significance, test the claim that the diet is effective in reducing weight. use the critical value method

Answer 1

Run t-Test: Two-Sample Assuming Equal Variances in excel followed by below procedures

Go to data tab --> Data analysis --> choose t-Test: Two-Sample Assuming Equal Variances

Result:

Critical value :3.055

P-value = 0.221

If the p-value is larger than 0.01, we cannot conclude that a significant difference exists