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Suppose that we want to estimate the proportion of recipes in the Better Homes and Gardens New Cook Book that do not involve animal products. We plan to take a simple random sample of the N=1251 kitchen-tested recipes, and we want to use a 99% confidence interval. How large of a sample do we need?
N=population size
Confidence interval=99%
Determine the probability distribution for X defined as number of defective items drawn (Hint: You have to determine P(X=0), P(X=1) and P(X=2).
ATM center in Mumbai is random with an average rate of 1.3 customer per min. Assume the arrival follows a Poisson distribution, calculate the probability that: Not a single customer arrived in a minute.
A sample of 350 lenses and found 5 lenses with surface defects. Formulate an appropriate test for the qualification of the polishing machine using an α = 0.05."
Does this sample indicate a smaller average? Use α = 0.05 and assume a normally distributed population.
Determine the mean and standard deviation of following probability distribution.
Random sample of 100 pieces of wire and wants to see if the thickness of a batch of wire meets minimum specifications. Assume that the population mean is 0.45 inch, with a standard deviation of 0.03 inch.
In the listed information is the findings statistically significant? Why or Why not? Describe the process used to make that determination and provide the level of significance.
A sample has just been taken with the following lengths: 21.25, 22.0, 21.5, 20.75, 21.25, 21.35, 21.35, 21.35, 21.35, 21.35, 21.35, and 21.35. Is the new seamstress performing at an acceptable quality level?
Using a 2-month weighted moving average, with weights of 2 for the most recent month and 1 for the previous month develop forecasts sales for March to June inclusive.
What is the appropriate t-test to conduct and should the null hypothesis be rejected
In a large department store a customer complaints office handles an average of six complaints per hour about the quality of service.
The average American male wears a size 10 shoe and spends 4 hours a year tying a tie. The average American female college student owns 3.5 pairs of jeans.
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