Petal length (in cm) of Iris virginica: x,;n, = 36 5.0 5.8 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 6.4 5.3 5.5 5.4 4.5 6.7 5.7 4.9 4.8 5.9 5.2 5.2 Petal length (in cm) of Iris setosa: x2; n2 = 38 1.4 1.8 1.4 1.5 1.5 1.6 1.4 1.1 1.0 1.7 1.2 1.4 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 1.6 n USE SALT (a) Use a calculator with mean and standard deviation keys to calculate x,, s,, Xa, and s,. (Round your answers to four decimal places.) X, = 5.4730 S = 5460 %3! X, = 1.4838 %3D S, = 52 2128 (b) Let u, be the population mean for x, and let H, be the population mean for x2. Find a 99% confidence interval for u, - Hz. (Round your answers to two decimal places.) lower limit 3.73 upper limit 4.24 (c) Explain what the confidence interval means in the context of this problem. Does the interval consist of numbers that are all positive? all negative? of different signs? At the 99% level of confidence, is the population mean petal length of Iris virginica longer than that of Iris setosa? MacBook Pro F12 $11 F10 F9 FB
Petal length (in cm) of Iris virginica: x,;n, = 36 5.0 5.8 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 6.4 5.3 5.5 5.4 4.5 6.7 5.7 4.9 4.8 5.9 5.2 5.2 Petal length (in cm) of Iris setosa: x2; n2 = 38 1.4 1.8 1.4 1.5 1.5 1.6 1.4 1.1 1.0 1.7 1.2 1.4 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 1.6 n USE SALT (a) Use a calculator with mean and standard deviation keys to calculate x,, s,, Xa, and s,. (Round your answers to four decimal places.) X, = 5.4730 S = 5460 %3! X, = 1.4838 %3D S, = 52 2128 (b) Let u, be the population mean for x, and let H, be the population mean for x2. Find a 99% confidence interval for u, - Hz. (Round your answers to two decimal places.) lower limit 3.73 upper limit 4.24 (c) Explain what the confidence interval means in the context of this problem. Does the interval consist of numbers that are all positive? all negative? of different signs? At the 99% level of confidence, is the population mean petal length of Iris virginica longer than that of Iris setosa? MacBook Pro F12 $11 F10 F9 FB
MATLAB: An Introduction with Applications
6th Edition
ISBN:9781119256830
Author:Amos Gilat
Publisher:Amos Gilat
Chapter1: Starting With Matlab
Section: Chapter Questions
Problem 1P
Related questions
Question
This is not correct, what am I doing wrong?
Transcribed Image Text:The following data represent petal lengths (in cm) for independent random samples of two species of iris.
Petal length (in cm) of Iris virginica: x,; n, = 36
5.0 5.8
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
5.9 5.2 5.2
Petal length (in cm) of Iris setosa: x2; n2 = 38
1.4
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
1.6
A USE SALT
(a) Use a calculator with mean and standard deviation keys to calculate x,, s,, X, and s. (Round your answers to four decimal places.)
x, = 5.4730
X1
%3D
S1
.5460
X, = 1.4838
S, = 2128
(b) Let u, be the population mean for x, and let H, be the population mean for x2. Find a 99% confidence interval for u, - Hz. (Round your answers to two decimal places.)
lower limit
3.73
upper limit
4.24
(c) Explain what the confidence interval means in the context of this problem. Does the interval consist of numbers that are all positive? all negative? of different signs? At
the 99% level of confidence, is the population mean petal length of Iris virginica longer than that of Iris setosa?
MacBook Pro
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F7
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F6
F5
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F2
F3
F4
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