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# chap10 - 10 1 GOALS Chapter Ten One-Sample Tests of...

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10- 1 Chapter Ten One-Sample Tests of Hypothesis One-Sample Tests of Hypothesis GOALS ONE Define a hypothesis and hypothesis testing. TWO Describe the five step hypothesis testing procedure. THREE Distinguish between a one-tailed and a two-tailed test of hypothesis.

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10- 2 Chapter Ten   continued GOALS FOUR Conduct a test of hypothesis about a population mean. FIVE Conduct a test of hypothesis about a population proportion. SIX Define Type I and Type II errors. One-Sample Tests of Hypothesis One-Sample Tests of Hypothesis
10- 3 What is a Hypothesis? What is a Hypothesis? Twenty percent of all customers at Bovine’s Chop House return for another meal within a month. What is a What is a Hypothesis? Hypothesis? A statement, claim or assumption about the value of a population parameter developed for the purpose of testing. The mean monthly income for systems analysts is \$6,325.

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10- 4 Types of Hypothesis Types of Hypothesis Testing Research Hypotheses A new drug will increase longevity in AIDS patients by 6 months Testing the Validity of a Claim A leading soft drink manufacturer states that each liter of a soft drink contains at least 67.6 ounces Testing in Decision-Making Situations Specifications for a part require a mean length of 2 inches per part. Any deviation from this standard will cause problems in assembly
10- 5 What is Hypothesis Testing? What is Hypothesis Testing? Hypothesis testing Hypothesis testing Based on sample evidence and probability theory Used to determine whether the hypothesis is a reasonable statement and should not be rejected, or is unreasonable and should be rejected “not guilty does not prove innocence”

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10- 6 Hypothesis Testing Hypothesis Testing D o n o t r e j e c t n u l l R e j e c t n u l l a n d a c c e p t a l t e r n a t e S t e p 5 : T a k e a s a m p l e , a r r i v e a t a d e c i s i o n S t e p 4 : F o r m u l a t e a d e c i s i o n r u l e S t e p 3 : I d e n t i f y t h e t e s t s t a t i s t i c S t e p 2 : S e l e c t a l e v e l o f s i g n i f i c a n c e S t e p 1 : S t a t e n u l l a n d a l t e r n a t e h y p o t h e s e s
10- 7 Alternative Hypothesis H 1 : A statement that is accepted if the sample data provide evidence that the null hypothesis is false Null Hypothesis H 0 A statement about the value of a population parameter Step One: State the null and alternate hypotheses Step One: State the null and alternate hypotheses

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10- 8 Three possibilities regarding means H 0 : μ = 0 H 1 : μ = 0 H 0 : μ < 0 H 1 : μ > 0 H 0 : μ > 0 H 1 : μ < 0 Step One: State the null and alternate Step One: State the null and alternate hypotheses hypotheses The null hypothesis always contains equality. 3 hypotheses about means
10- 9 Step Two: Select a Level of Step Two: Select a Level of Significance.

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chap10 - 10 1 GOALS Chapter Ten One-Sample Tests of...

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