8th Edition

ISBN: 9781337558075

Author: Charles Henry Brase, Corrinne Pellillo Brase

Publisher: Cengage Learning

Concept explainers

It simply refers to the likelihood of an event taking place whenever the occurrence of an event is uncertain. The probability of a single event can be calculated by dividing the number of successful trials of that event by the total number of trials.

Expected Value

When a large number of trials are performed for any random variable ‘X’, the predicted result is most likely the mean of all the outcomes for the random variable and it is known as expected value also known as expectation. The expected value, also known …

Probability Distributions

Understanding probability is necessary to know the probability distributions. In statistics, probability is how the uncertainty of an event is measured. This event can be anything. The most common examples include tossing a coin, rolling a die, or choosi…

Basic Probability

The simple definition of probability it is a chance of the occurrence of an event. It is defined in numerical form and the probability value is between 0 to 1. The probability value 0 indicates that there is no chance of that event occurring and the prob…

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Textbook Question

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Chapter 9.3, Problem 5P

Basic Computation: Testingp A random sample of 30 binomials trials resulted in 12 successes. Test the claim that the population proportion of s uccesses does not equal 0.50. Use a level of significance of 0.05.

(a) Check Requirements Can a normal distribution be used for the p ^ distribution? Explain.

(b) Stale the hypotheses.

(d) Find the P-value of the text statistic.

(e) Do you reject or fail to reject H 0 ? Explain.

(f) Interpretation What do the results tell you?

Features Features Normal distribution is characterized by two parameters, mean (µ) and standard deviation (σ). When graphed, the mean represents the center of the bell curve and the graph is perfectly symmetric about the center. The mean, median, and mode are all equal for a normal distribution. The standard deviation measures the data's spread from the center. The higher the standard deviation, the more the data is spread out and the flatter the bell curve looks. Variance is another commonly used measure of the spread of the distribution and is equal to the square of the standard deviation.

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Chapter 9.3, Problem 4P

Chapter 9.3, Problem 6P

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Chapter 9 Solutions

Understanding Basic Statistics

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Solution Summary: The author explains whether the normal distribution could be used for stackrelp distribution.

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