Answered: 15) The average retail price for…

MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

Section: Chapter Questions

Problem 1P

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Question

15) The average retail price for bananas in 2017 was 56.0 cents per pound. Recently, a random sample of 15 food stores resulted in a mean of 57.4 cents per pound with a standard deviation of 2.5 cents. Using the Minitab printout below, test the claim that the population mean price of bananas has increased at the 0.01 significance level. (Show all six steps.)

step 1) Ho:

step 2) Ha:

step 3)

step 4)

step 5)

step 6)

One-Sample T
Descriptive Statistics
95% Lower Bound
N Mean StDev SE Mean
15 57.400 2.500
for u
56.263
0.645
e mean of Sample
Test
Null hypothesis
Alternative hypothesis H;: µ > 56
T-Value P-Value
Họ: H = 56
2.17
0.024

Definition Definition Measure of central tendency that is the average of a given data set. The mean value is evaluated as the quotient of the sum of all observations by the sample size. The mean, in contrast to a median, is affected by extreme values. Very large or very small values can distract the mean from the center of the data. Arithmetic mean: The most common type of mean is the arithmetic mean. It is evaluated using the formula: μ = 1 N ∑ i = 1 N x i Other types of means are the geometric mean, logarithmic mean, and harmonic mean. Geometric mean: The nth root of the product of n observations from a data set is defined as the geometric mean of the set: G = x 1 x 2 ... x n n Logarithmic mean: The difference of the natural logarithms of the two numbers, divided by the difference between the numbers is the logarithmic mean of the two numbers. The logarithmic mean is used particularly in heat transfer and mass transfer. ln x 2 − ln x 1 x 2 − x 1 Harmonic mean: The inverse of the arithmetic mean of the inverses of all the numbers in a data set is the harmonic mean of the data. 1 1 x 1 + 1 x 2 + ...

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