Question: Overall mean 4.64 200 sample mean standard deviation 2.732 standard error of the mean (SEM) 1.222 Part 4: Using Excel, make the histogram of the
| Overall mean | 4.64 | ||
| 200 sample mean standard deviation | 2.732 | ||
| standard error of the mean (SEM) | 1.222 | ||
Part 4:
Using Excel, make the histogram of the 200 sample means (sampling distribution of the mean) (use interval size 1, i.e., 0 - <1, 1 - <2, 2 - <3, , 8 - <9). According to the Central Limit Theorem a bell shaped curve should appear. Show me this graph. make a histogram with Excel.
Part 5: Discuss the intuitive logic of the Central Limit Theorem. I.e., why do you get a normal distribution? Discuss the implications of part 4 in this context. (My videos might help here.)
Part 6: Use 2 methods to find P (>6.3), (with n=5 as in Parts 1-4): First the z-method of chapter 7 and then by simply counting how many of your 200 were above 6.3.
Part 7: Discuss the standard error of the mean. (Explain clearly the reasons why there is an n in the bottom of the formula; my video might help here as well.)
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