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Consider the following. (Give your answers correct to two decimal places.)
(a) Find the standard score (z) such that the area above the mean and below z under the normal curve is 0.3814.
(b) Find the standard score (z) such that the area above the mean and below z under the normal curve is 0.477.
(c) Find the standard score (z) such that the area above the mean and below z under the normal curve is 0.3614.
poker is a card game where a poker-hand is made up of 5 cards from a deck of 52 cards. a deck of 52 cards has four
suppose you have a coin that lands on heads with probability p 0 lt p lt 1. you dont know the value of p however. so
the numbers 8 9 10 and 12 are written on separate pieces of paper and put into a hat. two pieces of paper are drawn at
In our example of research on lipstick, where E = $2 and S = $29, what sample size would we require if we desired a 99 percent confidence level? What about if we keep the 95 percent confidence level, but decide that our acceptable error is $4?
What is wrong with this design? What confounds could be leading to the results of improved memory and problem-solving skills?
Historical data suggests a standard deviation in the first sample of 10 and a standard deviation in the second sample of 16. Find a 95% confidence interval for the population difference.
Compare the effectiveness of three methods of teaching (IV). You plan to administer a standardized test (DV measured on an interval scale measuring knowledge acquisition) to the students in three classes with each class using a different teaching ..
A sociologist wanted to determine whether there was a difference in the amount of time children aged 5-7 spent watching tv. what is the null hypothesis? Find the expected value.
A researcher is interested in the relationship between caffeine consumption and activity level for elementary school children. A sample of 20 children is obtained and the children are separated into two roughly equivalent groups.
houses with and without air conditioners on nine different streets in a certain city are shown below. test at the 5
If the process mean remains at 12.05 oz, what must the standard deviation be so that 99% of the cans will contain 12 oz or more?
The amount of time ships spend at the Philadelphia dockyard follows an exponential distribution and the average time spent in the dockyard is 3.1 days.
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