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At a temperature of 25 degrees C, the resistances of a type of thermistor are normally distributed with a mean of 10,000, ohms and a standard deviation of 4,000 ohms. The thermistors are to be sorted with those having resistances between 8000 and 15,000 ohms being shipped to a vendor. What fraction of these thermistors will be shipped?
suppose that to have power against a wider variety of alternatives the experimenter decides to base the test on the
Your manager, who just read an abridged version of a statistics book, wants you to test hypotheses for the difference in two population means.
Determine the area under the standard normal curve that lies: (a) to the left of Z = -2.31 (b) to the right of Z = -1.47 (c) between Z = -2.31 and Z = -1.47 (d) between Z = 1.47 and Z = 2.31
suppose x has an exponential distribution with mean equal to 10. determine followinga px gt 10b px gt 20c px gt
let x have an exponential distribution with mean sigma.a find the first quartile q1b how far is the first quartile
What should the average weight be if the production manager wants no more than 6% of the products to weigh more than 7.4 ounces?
Variance hour 100 and battery y: sample size 12,mean hour 1020,variance hour 121. can you conclude that two types of batteries are having the same mean life?
Choose the proper conclusion regarding the claim that the population have different variances.
Calculate the expected value of your portfolio and calculate the expected standard deviation of your portfolio.
Select the appropriate word to identify whether the measurement represents a categorical variable or a quantitative variable: The average number of minutes a person watches television each day.
you measure the weight of 5 small birds for two years these are the resultsbird year 1 year 21 512 5002 510 4903 508
Using the 0.05 level of significance, is there evidence that the population mean is above $300? What is your answer in (a) if s = $90 and the 0.10 level of significance is used?
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