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Suppose the weight of male babies less than 2 months old is normally distributed with mean 11.5 pounds and standard deviation 2.7 pounds. A sample of 36 babies is selected. What is the probability that the average weight of the sample is less than 11.28 pounds?
Write only a number, round to 4 decimal places.
the time to failure density function pdf for a system is ft 0.01 0ltt lt100 daysfind a rtb the hazard rate functionc
What is the point estimate for μ, the mean number of days absent for the firm's employees?- What is the point estimate for σ2, the variance of the number of days absent?
you are given the following information obtained from a sample of 5 observations taken from a population that has a
What would be my null hypothesis? Alternative hypothesis?
A coin is tossed four times. Find the mean, variance, and standard deviations of the number of heads that will be obtained.
A manufacturer of batteries offers a two-year limited warranty. If the battery fails for any reason during the first two years, it is replaced. What percentage of the batteries is expected to fail within the warranty period?
A recent study was designed to compare smoking habits of young women with those of young men. A random sample of 150 women revealed that 45 of them smoked.
1. for the 16 teams in the national league data is shown for the team batting averages as of august 27 2012.
Suppose you just purchased a digital music player and have put 8 tracks on it. After listening to them you decide that you like 3 of the songs. With the random feature on your player each of the 8 songs is played once in random order. Find the pro..
the beer institue conducted a study with looking at beer purcheses per capita across states. some states buy more beer
Make a purchase using the internet. Test the claim that the proportion of consumers ages 35-44 who plan to make purchases using the internet has increased at α = 0.01.
a survey from teenage research unlimited found that 30 of teenage consumers receive their spending money from part-time
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