Question 17 Hemoglobin levels in 11-year-old boys vary according to a Normal distribution with σ =...
Question 17
Hemoglobin levels in 11-year-old boys vary according to a Normal distribution with σ = 1.2 g/dl.
How large a sample is needed to estimate mean μ with 95% confidence so the margin of error is no greater than 0.5 g/dl?
| A. |
32 |
|
| B. |
23 |
|
| C. |
21.3 |
|
| D. |
25 |
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Question 17
Hemoglobin levels in 11-year-old boys vary according to a Normal
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7.5 we've established that heights of 10-year-old boys vary according to a Normal distribution with u...
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problems 4, 5, 6, 11 and 13 If the population standard deviation was doubled to 10.4...
problems 4, 5, 6, 11 and 13
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7.5 we've established that heights of 10-year-old boys vary according to a Normal distribution with u = 138 cm and o = 7 cm a) What proportion of this population is less than 150 cm tall? b) What proportion is less than 140 cm in height? c) What proportion is between 150 and 140 cm?
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problems 4, 5, 6, 11 and 13
If the population standard deviation was doubled to 10.4 and the level of confidence remained at 90%, what would be the new margin of error and confidence interval Margin of error, E. Confidence interval: 20.11<x<34.31 O Did the confidence interval increase or decrease and why? increase 4. Definition of Confidence Intervals (Section 6.1) Circle your answer, True of False. • A 99% confidence interval means that there is a 99% probability that the...
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