Question

Two teaching methods and their effects on science test scores are being reviewed. A random sample of 14 students, taught in traditional lab sessions, had a mean test score of 78.9 with a standard deviation of 5.5. A random sample of 7 students, taught using interactive simulation software, had a mean test score of 84.5 with a standard deviation of 5.3. Do these results support the claim that the mean science test score is lower for students taught in traditional lab sessions than it is for students taught using interactive simulation software? Let uy be the mean test score for the students taught in traditional lab sessions and uz be the mean test score for students taught using interactive simulation software. Use a significance level of a = 0.05 for the test. Assume that the population variances are equal and that the two populations are normally distributed. Step 2 of 4: Compute the value of the t test statistic. Round your answer to three decimal places. 8 Tables Keypad Answer How to enter your answer Previous Step Answers

Answer 1

samplert sample n=14 M₂ ZZ is 78.9 F = 84.5 Si = 5.5 S2 = 5.3 The test statistic to X - 4 Ilm- ) si +(12-19 (4+) ntn2-2 78.9-84.5 = 2.225 114-1)55+ (7-115.37 14+7-2 |- 2.225 | - 2. 225 An: assuming equal variances