ผลต่างระหว่างรุ่นของ "Probstat/homework 2"
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Jittat (คุย | มีส่วนร่วม) |
Jittat (คุย | มีส่วนร่วม) |
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| แถว 9: | แถว 9: | ||
'''Part 2:''' Distribution of sample means. | '''Part 2:''' Distribution of sample means. | ||
| − | 2.1 Suppose that the population is normally distributed with mean <math>\mu=10</math> and variance <math>\sigma^2 = 4</math>. Let <math>\bar{X}</math> be the mean of sample of size 10. Describe the distribution of <math>\bar{X}</math>. | + | 2.1 Suppose that the population is normally distributed with mean <math>\mu=10</math> and variance <math>\sigma^2 = 4</math>. Let <math>\bar{X}</math> be the mean of a sample of size 10. Describe the distribution of <math>\bar{X}</math>. |
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| + | 2.2 Find <math>P\{\bar{X} > 11\}</math>. (Hint: use the standard normal table to find the answer.) | ||
'''Part 3:''' Estimations and confidence intervals. | '''Part 3:''' Estimations and confidence intervals. | ||
รุ่นแก้ไขเมื่อ 15:37, 29 พฤศจิกายน 2557
- This is part of [probstat]].
Deadline: December 7th, 2014.
Part 1: Review of the normal distributions.
- work on Week 8 practice 2, basic practice, questions 2,4,6,8, and 10.
Part 2: Distribution of sample means.
2.1 Suppose that the population is normally distributed with mean and variance . Let be the mean of a sample of size 10. Describe the distribution of .
2.2 Find . (Hint: use the standard normal table to find the answer.)
Part 3: Estimations and confidence intervals.
