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In: Statistics and Probability
The following data represent the rates (micrometers per hour) at which a razor cut made in the skin of anesthetized newts is closed by new cells.
The following data represent the rates (micrometers per hour) at which a razor cut made in the skin of anesthetized newts is closed by new cells.
28 20 21 39 32 23 18 31 14 23 18 22 28 24 33 12 23 21 25 25
a. Can we say that the data are approximately normally distributed?
b. Find a 95% confidence interval for population mean rate 𝜇 for the new cells to close a razor cut made in the skin of anesthetized newts.
c. Find a 99% confidence interval for 𝜇.
d. Is the 95% CI wider or narrower than the 99% CI? Briefly explain why
Solutions
Expert Solution
Solution
a. Can we say that the data are approximately normally distributed?
We can say that the data are approximately normally distribution (the more data the more accurate ).
b. Find a 95% confidence interval for population mean rate 𝝁 for the new cells to close a razor cut made in the skin of anesthetized newts.
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66.3
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123.2
66.3
92.7
56.9
77.1
27.5
69.2
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67.2
78.6
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63.2
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59.6
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154.2
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keys to find the sample mean x...
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