jazmyn1314
19.12.2019 •
Mathematics
An educational psychologist wishes to know the mean number of words a third grader can read per minute. she wants to make an estimate at the 95% level of confidence. for a sample of 695 third graders, the mean words per minute read was 38.3. assume a population standard deviation of 3.6. construct the confidence interval for the mean number of words a third grader can read per minute. round your answers to one decimal place.
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Ответ:
(38.1,88.6)
Step-by-step explanation:
We are given the following in the question:
Sample mean, = 38.3
Sample size, n = 695
Alpha, α = 0.05
Population standard deviation, σ = 3.6
95% Confidence interval:
Putting the values, we get,
Ответ: