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According to the Sleep Foundation, the average night's sleep is 6.8 hours. Assume the standard deviation is 0.6 hours and the probability distribution is normal.
a. What is the probability that a randomly selected person sleeps more than 8 hours?
b. What is the probability that a randomly selected person sleeps 6 hours or less?
c. Doctors suggest getting between 7 and 9 hours of sleep each night. What percentage of the population gets this much sleep?
Comparison of paired and unpaired samples test - Prepare a brief conclusion statement summarizing your results. What can you tell this MHMR about client satisfaction? What could you suggest they do to improve?
Determine the probability that of a Type I error using decision rule if population mean is in fact 800 kilowatts per day?
Make for more scatter plots comparing GDP growth 1970-2000 to corruption, political rights, rule of law, and socio-political instability
The sample data are summarized by the statistics n = 27, x = 4.6 years, s- 1.9 years.
If a woman purchases Super Cola, what is the probability that it is a diet soda?
Find out the test statistic s and its two-sided P -value. Do data give good evidence that population mean is not zero?
A company tracked the number of complaints it received during the first 6 months of last year, as shown in the following table:
Suppose that population has normal distribution. Determine a 95 percent confidence interval for population standard deviation sigma.
Use simple exponential smoothing with α = 0.33 to forecast battery sales for February through May. Assume that the forecast for January was for 22 set of tires.
A large tank of fish from a hatchery is being delivered to a lake. The hatchery claims that the mean length of fish in the tank is 15 inches, and the standard deviation is 2 inches. A random sample of 36 fish is taken from the tank.
Either no change to the Objective function or a raise in the value of the objective function depends on the constraint.
Create a 90 percent confidence interval for the population proportion of all such firms with this as the primary motivation.
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