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Suppose the probability that a carton of eggs will contain at least one broken egg is 1/3. use a simulation of 20 trials to find the probability that the next three cartons will contain only unbroken eggs.
A light bulb manufacturer guarantees that the mean life of a certain type of light bulb is at least 925 hours. A random sample of 39 light bulbs has a mean life of 905 hours with a standard deviation o 55 hours.
Jim Sears manufactures farm equipment. His work requires the use of steel bars which must have a mean length of at least 50 inches. The bars can be purchased from a supplier in Kansas
At the .01 significance level, can we conclude that there is more variation?
ESPN reported in sample of 1000 homes the proportion of people who watched the Texas v. Ohio State college football game this weekend was .6.
Display the data in scatter plot. Calculate the linear correlation coefficient. Use the scatterplot to make a conclusion about the type of correlation.
Compute 95 percent confidence interval for mean percentage share of billing volume from network television for population of all US advertising agencies.
Critically discuss the main differences between descriptive and inferential statistics? Provide an example of either type of statistics either from a recent study you heard about or a made up study you'd be interested in learning about.
The probability of occurrence (P(X)). Compute the Expected Value (Mean), The Variance, and The Standard Deviation for this random variable.
What is the minimum sample size you should use to assure that your estimate of will be within the required margin of error around the population p?
Suppose these data represent whole population. Determine the population mean and population standard deviation.
Assume that increasing and decreasing allergic reactions are equally likely if the training has no effect. Use alpha = .05
If the mean lifetime of this type of component is 100 hours and its standard deviation is 19 hours, how many of these component must be in stock so that the probability of the system is in continual operations for the next 2,000 hours is at least ..
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