A local university administers a comprehensive examination to the candidates for B.S. degrees in Business Administration. Five examinations are selected at random and scored. The scores are shown below.
a.Compute the mean and the standard deviation of the sample.
b.Compute the margin of error at 95% confidence.
c.Develop a 95% confidence interval estimate for the mean of the population. Assume the population is normally distributed.
Definitions:
Trials
In probability, the term refers to the execution of an experiment or the number of times an experiment is run.
Poisson Distribution
A statistical distribution showing the probability of a given number of events occurring in a fixed interval of time or space.
Discrete Probability Distribution
A mathematical function that represents the probabilities of occurrence of different possible outcomes for a discrete random variable.
Skewed To The Right
Describes a distribution of data where the tail on the right side of the histogram is longer or fatter than the left side, indicating that most of the data are concentrated to the left.
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