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If there are 300 students in Binnon on Sept 1 with mean age of 22 and...

  1. If there are 300 students in Binnon on Sept 1 with mean age of 22 and standard deviation of 3, what is the probability of selecting another sample of 6 students with a mean age greater than 19?
  2. Construct a 95% confident Interval to estimate the 300 students’ average age.
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Answer #1
19.00 hypothesized value
22.00 mean 1
3.00 std. dev.
1.22 std. error
6 n
5 df
2.449 t
.0290 p-value (one-tailed, upper)

The probability is 0.0290.

21.66 confidence interval 95.% lower
22.34 confidence interval 95.% upper
0.34 margin of error

The 95% confident Interval to estimate the 300 students’ average age is between 21.66 and 22.34.

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