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The probability that a particular type of smoke alarm will function properly and sound an alarm in the presence of smoke is 0.8. You have 2 such alarms in your home and they operate independently.
What is the probability that both sound an alarm in the presence of smoke?
In this scenario, is it appropriate to use the t distribution to approximate the sampling distribution?
For a sample of 20, what t-value would you use to establish the 98th percentile?
A sample of 100 mortgages approved during the current year showed that 31 were issued to a single-earner family or individual. The historical average is 25 percent.
When creating a 99% confidence interval for the true average difference in cholesterol levels by the drug, what is the margin of error?
Interpret the interval. Assume that the fastball ball pitching speeds are normally distributed.
It is believed that the number of kilometers driven by a tourist in the program is normally distributed with mean 4,500 and standard deviation 1,800. If a country wants to set the mileage limit at a point such that 80% of the tourists in the progr..
Ford Taurus travels 21 mi. while consuming exactly 1 gallon of gas. You developed a modification to the engine you believe increases the distance. If you want to justify your claim of increased mileage by using a hypothesis test
Enlarged to 14 measurements, by including two additional measurements having a common value of 40 each. Find the standard deviation of the sample of 14 measurements.
With reference to Example 13 and the computer printout of Figure 4, find the probability that a 15-squarefoot sheet of the metal will have anywhere from 8 to 12 defects, using
Give an ending for the below statement.Last week Tom had exams in Statistics and in English. He scored 10 points above the mean on both exams. From this information, you can conclude.
What type of data do surveys gather? What draw backs would you expect to encounter when using a survey?
Suppose that the average monthly pay for U. S. production worker is 2000$.Assume that available date indicate that production worker wages normally distributed with a standard deviation of 400$ .Suppose that a simple random sample of sides n=6..
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