MATLAB: An Introduction with Applications
6th Edition
ISBN: 9781119256830
Author: Amos Gilat
Publisher: John Wiley & Sons Inc
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The following data represent petal lengths (in cm) for independent random samples of two species of iris.
Petal length (in cm) of Iris virginica: x1; n1 = 36
5.2 | 5.6 | 6.1 | 6.1 | 5.1 | 5.5 | 5.3 | 5.5 | 6.9 | 5.0 | 4.9 | 6.0 | 4.8 | 6.1 | 5.6 | 5.1 |
5.6 | 4.8 | 5.4 | 5.1 | 5.1 | 5.9 | 5.2 | 5.7 | 5.4 | 4.5 | 6.4 | 5.3 | 5.5 | 6.7 | 5.7 | 4.9 |
4.8 | 5.8 | 5.2 | 5.2 |
Petal length (in cm) of Iris setosa: x2; n2 = 38
1.6 | 1.8 | 1.4 | 1.5 | 1.5 | 1.6 | 1.4 | 1.1 | 1.2 | 1.4 | 1.7 | 1.0 | 1.7 | 1.9 | 1.6 | 1.4 |
1.5 | 1.4 | 1.2 | 1.3 | 1.5 | 1.3 | 1.6 | 1.9 | 1.4 | 1.6 | 1.5 | 1.4 | 1.6 | 1.2 | 1.9 | 1.5 |
1.6 | 1.4 | 1.3 | 1.7 | 1.5 | 1.5 |
(a)
Use a calculator with mean and standard deviation keys to calculate x1, s1, x2, and s2. (Round your answers to four decimal places.)
x1=s1=x2=s2=
(b)
Let μ1 be the population mean for x1 and let μ2 be the population mean for x2. Find a 99% confidence interval for μ1 − μ2. (Round your answers to two decimal places.)
lower limitupper limit
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- The following data represent petal lengths (in cm) for independent random samples of two species of iris. 5.0 5.8 6.3 6.1 5.1 5.5 5.3 5.5 6.9 5.0 4.9 6.0 4.8 6.1 5.6 5.1 5.6 4.8 5.4 5.1 5.1 5.9 5.2 5.7 5.4 4.5 6.4 5.3 5.5 6.7 5.7 4.9 4.8 5.9 5.1 5.1 1.6 1.6 1.4 1.5 1.5 1.6 1.4 1.1 1.2 1.4 1.7 1.0 1.7 1.9 1.6 1.4 1.5 1.4 1.2 1.3 1.5 1.3 1.6 1.9 1.4 1.6 1.5 1.4 1.6 1.2 1.9 1.5 1.6 1.4 1.3 1.7 1.5 1.7 (b) Let ?1 be the population mean for x1 and let ?2 be the population mean for x2. Find a 99% confidence interval for ?1 − ?2. (Round your answers to two decimal places.) lower limit=__ upper limit=__arrow_forwardCalculate the Variance using the following information: EXi = ΣΧ2 = n 32.3 413.8 18 Round your answer to the nearest hundredth. (Place your answer in the box below)arrow_forwardConstruct a normal quantile-quantile plot ofthese data, which represent the diameters of 36 rivetheads in 1/100 of an inch:6.72 6.77 6.82 6.70 6.78 6.70 6.626.75 6.66 6.66 6.64 6.76 6.73 6.806.72 6.76 6.76 6.68 6.66 6.62 6.726.76 6.70 6.78 6.76 6.67 6.70 6.726.74 6.81 6.79 6.78 6.66 6.76 6.766.72arrow_forward
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