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The personnel director of a large corporation wishes to study absenteeism among clerical workers at the corporation's central office during the year. A random sample of 25 clerical workers reveals the following:
• Absenteeism: X bar = 9.7 days, S = 4.0 days
• 12 clerical workers were absent more than 10 days.
a) Construct a 95% confidence interval estimate of the mean number of absences for clerical workers during the year.
b) Construct a 95% confidence interval estimate of the population proportion of clerical workers absent more than 10 days during the year.
R for my statistics class and need to write the code for this problem: "An experiment with four treatments and five replications of each treatment, which requires 20 experimental units. How many randomizations are possible for this experiment?..
You're responsible for planning parking needed for a new 256-unit apartment complex, and you're told to base the needs on the statistic 'average number of vehicles per household is 1.9'.
The relative frequency distribution of the number of TVs sold in a day in a department store in the last year is as follows: Compute the mean and standard deviation of this distribution.
Let X be the random variable which denotes the number of saves that are made by the lacrosse goalie. Find the expected value and standard deviation of the random variable.
Use a 5% significance level to test the claim that there appears to be a difference in the effectiveness of the two diets.
coefficient of variation and standard deviation are two measures of dispersion or spread among the data values. lets
for each of the following find the probability for the given normal distirbutiona. p x gt 4 if x - n 5 52b. p x lt 2
A coin was flipped 60 times and came up heads 36 times. What is the critical value you would use to test whether the proportion of heads is greater than 0.50 at a 10% level of significance?
There is pretty good chance average number of days absent would be 12 or more. That is what occurred to us - chance variation." Is this good defense? Justify the answer.
the probabilities that a service station will pump gas into 0 1 2 3 4 or 5 or more cars during a certain 30-minute
variables for which you would utilize a repeated measures ANOVA in analysis. Describe the variables and their scale of measurement. Identify whether each factor is fixed or repeating.
Five students took a math test before and after tutoring. Their scores were as follows. Using a 0.01 level of significance, test the claim that the tutoring has an effect on the math scores.
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