Before QUESTION A teacher randomly selects ten students to participate in a week of training designed to improve their t

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Before Question A Teacher Randomly Selects Ten Students To Participate In A Week Of Training Designed To Improve Their T 1 (97.12 KiB) Viewed 75 times

Before QUESTION A teacher randomly selects ten students to participate in a week of training designed to improve their typing speed. The number of words typed in a minute is recorded before and after the course. The data is analyzed and illustrated in the following output. Assume that the number of typing in a minute is normally distributed Paired Samples statistics Mean Std. std. Error Deviation Mean Pair 10 After 10 58.8 3.324 1:209 Paired samples Test Patred Differences std. Deviation Std. Errot Mean Pair 1 Before After 3.91 1.238 a) Find the X value (1 mark) b) Construct a 95% confidence interval for the mean ditterence in typing spoed between botore and after the course (3 marks) c) Based on the values obtained in b), can it be concluded that there is a mean difference in their typing speed when attending the course? Give a reason to support your answer. (1 mark) Mean X