The testing bureau reports that the mean for the population of Graduate Records Exam (GRE) scores is 500 with a standard deviation of 90. The scores are normally distributed. What proportion of the... more
A health magazine reported that 27% of adult males smoke cigarettes. A competing magazine thinks this claim is false.
A health magazine reported that 27% of adult males smoke cigarettes. A competing magazine thinks this claim is false. To test this claim, they select 40 adult males at random and record if they... more
Question about average thickness, standard deviation and probability distribution
Each manufacturer of sliced bread has to choose how thin to slice their bread. It turns out that sliced bread in the US has an average thickness (μ) of 9.2mm, a standard deviation (σ) of 2.5mm, and... more
If a random sample of size 16 is taken with replacement from the population 1, 1, 1, 2, 4, 5, 5 and 6, what is the mean, variance and standard deviation of the sampling distribution?
Find the following:* MEAN OF SAMPLING DISTRIBUTION* STANDARD DEVIATION OF THE SAMPLING DISTRIBUTION* VARIANCE OF THE SAMPLING DISTRIBUTION