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In order to compare failure rates for two brands of tires, a sample of 600 tires of Brand A was taken, of which 36 failed. For a sample of 800 tires of Brand B, 32 failed. Can we conclude at the 0.05 level that there is a difference in failure rates?
inclusions are defects in poured metal caused by contaminants. the number of large inclusions in cast iron follows a
question 1 if 100 random samples of size n were drawn and if for each a 99 confidence interval fornbspmu was computed
Twenty three percent of automobiles are not covered by insurance. On a particular weekend, 35 automobiles are involved in accident.
the owner of prices limited claims that 75 of all the itmens in the store are less than 5. suppose that you check a
suppose certain coins have weights that are normally distributed with a mean of 5.319 g and a standard deviation of
a busy restaurant determined that between 630 p.m. and 900 p.m. on friday nights the arrivals of customers are poisson
Construct upper and lower control limits for the x chart, using the given product parameters. (b) Plot the data on the control chart. (c) Is this process in control? Explain your reasoning.
Find the probability using the Poisson distribution.
The daily revenue totals for the next 30 days will be monitored. What is the probability that the mean daily revenue for the next 30 days will be between $7000 and $7500?
Derive the formula for the expected value Y, derive the formula for the moment generating function of Y
More precipitation for May is 12. Question: What is the probability that Rapid City has 18 days with .01 inch or more precipitation next May?
A leasing firm claims that the mean number of miles driven annually,M , in its leased cars is less than 13020 miles. A random sample of 90 cars leased from this firm had a mean of 12750 annual miles driven.
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