a. Complete the table by calculating the expected frequencies. b. What is the chi-square test statistic? Round to three decimal places. x = %3D c. What are the degrees of freedom? degrees of freedom %3D

a. Complete the table by calculating the expected frequencies. b. What is the chi-square test statistic? Round to three decimal places. x = %3D c. What are the degrees of freedom? degrees of freedom %3D

Name: Acme Toy Company prints baseball cards. The company claims that 30% o
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Description: Acme Toy Company prints baseball cards. The company claims that 30% of the cards are rookies, 60% areveterans, and 10% are All-Stars. Suppose a random sample has the following cards. Test Acme's claim thatthe distribution is a good fit with the prin

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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Concept explainers

Inverse Normal Distribution

The method used for finding the corresponding z-critical value in a normal distribution using the known probability is said to be an inverse normal distribution. The inverse normal distribution is a continuous probability distribution with a family of two parameters.

Mean, Median, Mode

It is a descriptive summary of a data set. It can be defined by using some of the measures. The central tendencies do not provide information regarding individual data from the dataset. However, they give a summary of the data set. The central tendency or measure of central tendency is a central or typical value for a probability distribution.

Z-Scores

A z-score is a unit of measurement used in statistics to describe the position of a raw score in terms of its distance from the mean, measured with reference to standard deviation from the mean. Z-scores are useful in statistics because they allow comparison between two scores that belong to different normal distributions.

Topic Video

Question

Acme Toy Company prints baseball cards. The company claims that 30% of the cards are rookies, 60% are
veterans, and 10% are All-Stars. Suppose a random sample has the following cards. Test Acme's claim that
the distribution is a good fit with the prints of baseball cards at an a = 0.05 level of significance.
Observed
Expected
Frequency
Category
Frequency
Rookies
25
Veterans
110
All-Stars
15
a. Complete the table by calculating the expected frequencies.
b. What is the chi-square test statistic? Round to three decimal places.
c. What are the degrees of freedom?
degrees of freedom =
d. What is the p-value for this sample? Round to four decimal places.
p-value =
e. Is the p-value less than a? ?
f. Make a decision.
O Reject the null.
O Fail to reject the null.
g. Make a conclusion.
O There is not sufficient evidence to support the claim that Acme's distribution of baseball cards
is a good fit.
There is sufficient evidence to support the claim that Acme's distribution of baseball cards is a
good fit.

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