Suppose a random sample of 50 is drawn from a population whose standard deviation is unknown. If the sample mean is 70 and the sample standard deviation is 5, the 90% confidence interval to estimate the population mean is between O 69.01 and 70.99 O 69.34 and 70.65 68.81 and 71.19 O 69.52 and 70.99 O 69.32 and 70.68

MATLAB: An Introduction with Applications
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Author:Amos Gilat
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Suppose a random sample of 50 is drawn from a population whose standard deviation is unknown. If the sample mean is 70 and the sample standard deviation is 5, the 90% confidence interval to estimate the population mean is between _______.

- ☐ 69.01 and 70.99
- ☐ 69.34 and 70.65
- ☐ **68.81 and 71.19**
- ☐ 69.52 and 70.99
- ☐ 69.32 and 70.68

The third option, 68.81 and 71.19, is selected.
Transcribed Image Text:Suppose a random sample of 50 is drawn from a population whose standard deviation is unknown. If the sample mean is 70 and the sample standard deviation is 5, the 90% confidence interval to estimate the population mean is between _______. - ☐ 69.01 and 70.99 - ☐ 69.34 and 70.65 - ☐ **68.81 and 71.19** - ☐ 69.52 and 70.99 - ☐ 69.32 and 70.68 The third option, 68.81 and 71.19, is selected.
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