ANSWERS_-_sampling_distributions_and_hypothesis_testing

ANSWERS_-_sampling_distributions_and_hypothesis_testing -...

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Unformatted text preview: AN S W E R S T h e D i s t r i b u t i o n o f S a m p l e Me a n s . I n t ro d u c t i o n t o H y p o t h e s e s T e s t i n g 1. A company embarks on a new program to boost morale and reduce the amount of absenteeism. The company has recorded an average of 10.5 absences per employee per year with a standard deviation of 4, and an approximately normal distribution. The president of the company sets a goal of = 7absences per year for the employees. A random sample of 8 employees was used. The personnel director believes this is overly optimistic and cannot be achieved. a. Is there a significant difference between the sample mean and the presidents goal? Test with alpha set at .05. STEP 1 : Null Hypothesis: 7 Research Hypothesis: < 7 STEP 2 : Determine the characteristics of the sampling distribution Mean = 10.5; Standard deviation = 4; Standard error of the mean = x = / n = 4/ 8= 1.41 STEP 3 : Determine the cutoff sample score (I Call this the critical region)...
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This note was uploaded on 04/29/2010 for the course PSYCH 315 taught by Professor Afroditipanagopoulos during the Winter '10 term at Concordia Canada.

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ANSWERS_-_sampling_distributions_and_hypothesis_testing -...

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