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The probability distribution for the possible results of an experiment is given, Determine the mean of the distribution.
X P(X)
1 0.100
3 0.300
5 0.425
7 0.175
Round mean to nearest 10th
Develop a p chart with 3-sigma control limits and evaluate whether the process is in statistical control
Determine the probability mass function of the salesperson's November sales (in $). What is the probabiity that his sales for November will be less than 100k? Find the mean and standard deviation of the November sales.
Given that x is a normal variable with mean u = 47 and standard deviation = 6.2, find:
A major problem resulting from the lack of randomization in a cohort study is: the possibility that a factor that led to the exposure, rather than the exposure itself, might have caused the disease.
The closing price of a company's stock tomorrow can be lower, higher or the same as today's closed. Without any prior information that may affect the price of the stock tomorrow, the probability that it will close higher than today's close is 1/3
Generate a 95 % confidence interval for the difference in proportions of patients who report pain relief.
Three members of a club will be selected to serve as officers. The first person selected will be president, the second person will be vice-president and the third will be secretary/treasurer.
What is correlation analysis? How can correlation analysis be used in a business decision or examples specifically related to strategy formulation and implementation?
Construct a 95% confidence interval for the proportion of all those who experience some type of discomfort.
The lifetimes of light bulbs of a particular type are normally distributed with a mean of 370 hours and a standard deviation of 5 hours. What percentage of bulbs has lifetimes that lie within 1 standard deviation of the mean on either side?
Can you conclude that the information in the article is untrue? Use the 0.05 significance level. Determine the p-value and explain its meaning.
If the population mean was $1047 in the previous year, does the evidence suggest that expenditure this year has significantly changed?
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