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Is music playing on the radio? Turn on your favorite music radio station 8 times at least 10 minutes apart. Each time record whether or not music is playing. Calculate the number of times music is playing divided by 8.
This number is an estimate of the probability that music is playing when you turn on this station. It is also an estimate of the proportion of time that music is playing on this station.
the content of a particular constituent in two different brands of a drug measured in milligrams was found to be as
The point estimate for the difference between the proportions is:
I am writing a thesis and need a paired difference statistical analysis with a confidence level at 95% with t-value for alpha of 0.25
Use the trend equation to calculate the points for 2003 and 2005. Plot them on the graph and draw the regression line.
The probability of getting a promotion and a raise is 0.25. What is the probability of getting a raise.
the rockwell hardness of a metal is determined by impressing a hardened point into the surface of the metal and then
Assume that cans of Coke are filled so that the actual amounts have a mean of 12.00 oz and a stand. dev. of 0.11 oz. Find the P that a sample of 36 cans will have a mean amount of at least 12.19 oz.
An achievement test is said to be reliable if a student who takes the test several times will consistently get high (or low) scores. One way of checking the reliability of a test is to divide it into two parts, usually the even-numbered problems a..
a sample of 80 women is obtained and their heights in inches and pulse rates in beats per minute are measured. the
question a researcher finds a claim in the newspapers that the average room rate arr of all abu dhabi hotels is 163
Create a 95% confidence interval for proportion of highly educated women who left careers for family reasons and who wish to return to work.
An insurance company checks police records on 1200 randomly selected auto accidents and notes that teenagers were at the wheel in 180 of them. Construct a 90% confidence interval estimate of the proportion of auto accidents that involve teenage dr..
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