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38.8 < u < 50.5find the sample mean, x.
A random sample of 101 light bulbs had a mean life of x=481 hours with a standard deviaiton of s=30 hours. Construct a 90 percent confidence interval for the mean life, u, of all light bulbs of this type.
32 packages are randomly selected from packages reveived by a parcel service. The sample has a mean weight of 23.0 pounds and a standard deviation of 1.9 pounds. What is the 95 percent confidence interval fro the true mean weight, u, of all packages received by the parcel service?
The auto parts department of an automotive dealership sends out an average of 8 special orders daily. The number of special orders is assumed to follow a Poisson distribution.
For a population with a mean of μ = 60 and a standard deviation of σ = 24, find the Z score corresponding to each of the following samples.
Compute the Relative risk (RR) of ADR with Drug A compared to Drug B. Show all calculation. Interpret the RR value. Do you arrive at the same conclusion based on the OR estimate and RR?
A gender selection method is effective in helping couples have baby girls, and among 45 babies, 24 are girls. Create subjective estimates to conclude that the evidence does support the claim or that the evidence does not support the claim. Use the..
Find the p-value and interpret it. (f ) If statistically significant, do you think the difference is large enough to be important? If so, to whom, and why? (g) Is the normality assumption fulfilled? Explain.
A certain police officer stops cars for speeding. The number of red sports cars she stops in one hour is a Poisson process with rate 4, while the number of other cars she stops is a Poisson process with rate 1.
How does multilinear regression analysis apply to your profession? Specify the dependent value and the set of predictors. Where would you get the data?
Find out equation of the line of best fit. Find out r - Is there a strong relationship?
You construct a 90% confidence interval for the average stock price to be (267.348, 279.472). Of the following choices, what is the approporiate interpretation of this interval?
Drug manufacturer knows that for a certain antibiotics, the average number of doses ordered for a patient is 20. Steve Simmons, a salesman for the company
A confidence interval for the population mean tells us which values of mean are plausible (those inside the interval) and which values are not plausible (those outside the interval) at the chosen level of confidence.
In its third year, a football team averaged 16,050 fans per game, with a standard deviation of 2,500 fans. What is the probability that the number of fans at any given game was greater than 20,000?
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