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I. Calculate the following statistical measures:
a) The Mean ____________________
b) The Median:
c) The Range
d) What is the Variance ____________________
e) The Standard Deviation
II. Should the penitentiary use the mean or median in its analysis, and why?
III. What does the standard deviation mean? Interpret the standard deviation relative to the average or mean?
He would like to estimate with .05 of the true proportion with a confidence level of 90%. What is the sample size needed?
Using the EMV criteria (you wish to maximize expected profits in this case) determine what course of action that Optel should take. Make sure to state the best strategy in words.
At.05 significance level, is there a difference in mean number of calls per day between 2 employees? Compute the p -value?
At 0.05 level of significance, is there evidence of significant relationship between age group and where people mainly get their news? If so, describe the relationship.
From past data, it is recognized that company's production process results in normally distributed yield strengths. Test company's claim at a = 0.05.
Do you benefit by using a cum sum chart rather than a control chart?
At the .05 significance level, can we conclude that the mean waiting time is less than 3 minutes?
For binomial distribution among given values for n as well as p state whereas or not it is suitable to use normal distribution as an approximation.
What is the probability that the mean weight for a sample of 40 trout exceeds 405.5 grams?
A pair of dice is rolled. What is the probability of each of the following? (Round your answers to three decimal places.)
Use this information to construct a probability table, and then calculate each of the following probabilities:
At α = 0.05, is the correctness of the prediction different for the two types of cola drinkers?
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