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The article "Compatibility of Outer and Fusible Interlining Fabrics in Tailored Garments (Textile Res. J., 1997: 137-142) gave the following observations on bending rigidity (µN . m) for medium-quality fabric specimens, from which the accompanying Minitab output was obtained:
Would you use a one-sample t confidence interval to estimate true average bending rigidity? Explain your reasoning.
A pie chart shows the market shares of cola products. The "slice" for Pepsi-Cola has a central angle of 90 degrees. What is its market share.
Assume you randomly sample one mouse from the colony. The probability his age will be between 55 and 70 days is?
a survey of women students at a college showed that 15 smoke cigarettes 40 drink coffee and 5 both smoke cigarettes and
every home football game for the past eight years at eastern state university has been sold out. the revenues from
Variance of 4.2 and mean of 23.2 were calculated. Find out 95% confidence interval on mean and standard deviation. Describe any potential problems with this analysis.
What z-score bounds middle 95 % of the normal distribution and what z-score is associated with 75th percentile?
What is the relationship between a confidence interval and a single sample, two-tailed hypothesis test? How are they the same? How are they different?
Employee theft or poor inventory control and that employee theft and poor inventory control are equally likely? Use the .02 significance level.
a construction company figures the cost of a project based on an average idle time of 68 minutes per worker per 8 hour
In a box of 15 marbles, 4 are green. You choose 2 at random without replacement (a) Create a tree diagram for the 2 draws. (b) Create a probability model for the number of green marbles in two draws.
a sample of 250 observations is selected from a normal population for which the population standard deviation is known
Use this information to determine the empirical probability that the next bird to visit the feeding station will be a dove.
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