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To find the mean and variance using the probability distribution.
Bill Russ, the production manager at Ross Co., maintains detailed records on number of times each machine breaks down and requires service all through the week. Bill records show that the Puret grinder has required repair service according to the following distribution.
Number of Breakdowns per week
Weeks
Probability
0
20
0.333
1
2
10
0.167
3
60
1.000
totals
[a] calculate the arithmetic mean number of breakdowns per week.
[b] Calculate the variance of the number of breakdowns per week.
What is the intercept for the logistic regression equation and What is a 95% confidence interval for the odds ratio
Twelve doctor's offices were given 3 lab inspections with the following results:
A sample of 100 observations has a mean of 2.99 and a standard deviation s equal to 0.5 Conduct the following test of hypotheses about the corresponding population mean at a level of significance of α = 0.2
Are number of toilet breaks and amount of beverage consumed related? Describe how? Provide the value of statistic and probability value.
At the 5 percent level of significance, does this sample prove a violation of the guideline that the average patient should pay no more than $250 out-of-pocket? State your hypotheses and decision rule.
Construct a 99% confident interval for the standard deviation of the amount of vitamin B6 per pill.
Find the standard normal area for each of the following: (Round the answers to 4 decimal places.)
A teacher gave a 25 question multiple choice test. After scoring the tests, she computed a mean and standard deviation of the scores. The standard deviation was 0. Based on this information
Write introduction to STATISTICAL PROCESS CONTROL and Explain the use of SPC tools used at D2D
When using the distribution of sample means to estimate the population mean, what is the benefit of using larger sample sizes?
Find the probability that at least one subject experiences headaches. Is it unusual to have at least one of six subjects experience headaches?
Answer all of these questions using R Commander. Include all graphs, outputs from R Commander.
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