1. Give 2 difference between normal distribution and t-distribution. 2. Suppose a population has mean 100. Then we get a sample of 10 cases and the mean of this sample is 120 and standard deviation 16. Find the t - score if the sample is 10 cases. ( includes solution)

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1. Give 2 difference between normal distribution and t-distribution.
2. Suppose a population has mean 100. Then we get a sample of 10 cases and the mean of this
sample is 120 and standard deviation 16. Find the t - score if the sample is 10 cases. (
includes solution)
3. Find the t-value for an area 0.001 in the right tail of t-distribution with a sample of 10.
4. Find the t-value for an area 0.025 in the left tail of t-distribution with 14 degrees of freedom.
5. Find the area to the right of 1.323 under at-distribution with 19 degrees of freedom.
6. Rowena wants to test a randomly selected 20 students for her study. Identify the t-value of
the following percentiles.
a) 75th percentile
b) 15th percentile
c) 99th percentile
Transcribed Image Text:1. Give 2 difference between normal distribution and t-distribution. 2. Suppose a population has mean 100. Then we get a sample of 10 cases and the mean of this sample is 120 and standard deviation 16. Find the t - score if the sample is 10 cases. ( includes solution) 3. Find the t-value for an area 0.001 in the right tail of t-distribution with a sample of 10. 4. Find the t-value for an area 0.025 in the left tail of t-distribution with 14 degrees of freedom. 5. Find the area to the right of 1.323 under at-distribution with 19 degrees of freedom. 6. Rowena wants to test a randomly selected 20 students for her study. Identify the t-value of the following percentiles. a) 75th percentile b) 15th percentile c) 99th percentile
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