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A computer diskette manufacturer is concerned that some diskettes have bad sectors that would cause a diskette to hold less information than it was intended to hold. In the past, only 5% of these diskettes have bad sectors. If the company wishes to set 99.7% control limits based on samples of size 500, what would these limits be?
How many subjects would you approximately need to reduce the length of the 95% confidence interval to 2 units?
Results were analyzed using one -way ANOVA and included SSTR =7 , 102 and SSE = 10 ,511. Are all 8 tapes equally appealing on average? Determine p value?
Using part(a), explain to investor differences between distribution of performance figures for the 2 kinds of stock funds.
Construct a 90 percent confidence interval for the true mean weight. Describe factors which might cause variation in the weight of Tootsie Rolls during manufacture.
Determine the rejection region for the hypothesis Ho : mean D= 0 if H a : mean D > 0. Use a = 0.01. z>
Assuming an exponential service rate μ, set this up as a birth and death process and determine the birth and death rates.
Find a 99% confidence interval for the population mean number of weekly miles.
The article should include a margin of error and confidence interval. Discuss the subject matter in the article, and interpret the results and what the confidence interval and margin of error mean as they apply to the specific subject matter.
When modelling E(y) with single qualitative independent variable, number of 0 - 1 dummy variables in model is equal to number of levels of qualitative variable.
Sample of size 26 was taken from normal population with standard deviation 1.697. Approximate the probability that standard deviation of sample is greater than 1.23.
Which are likely to be independent events? For those you think are not, suggest reasons why.
Using an alpha level of 0.05, please use SPSS to perform a one-way ANOVA and then determine whether the data below provide evidence for Theory A, Theory B, or Theory C. In other words, is one theory stronger than the others?
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