Conducted of the age in years
A survey was conducted of age in years of 50 randomly chosen customers. The mean was 27.47 years and standard deviation was 10.69 years.
How large would the sample size behave to be to cut margin of error in half?
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A researcher tested both brands of medicine on two groups of randomly chosen patients. The results of test are given in the following table. The mean and standard deviation of relief times are in minutes.
If we have the simple linear regression model and 95% confidence interval of data we want to determine, how do we find out the 97.5th and 2.5th percentile?
One hundred unordered samples of size two are drawn without replacement from urn containing size red chips and four white chips. Test the adequacy of hypergeometric model if zero whites were obtained 35 times; one white, 55 times; as well as two w
Diameter of cup is 3 inches. Liquid is being consumed at rate of 2 cubic inches per second. How fast is level of soda decreasing in inches/sec?
Compute the expression for f(x) in which f(x) is the quartic function, f(x) > 0 when -2 < x < 1, f(x) is equal or less than 0 when x < -2 or x >1. f(x) has the double root when x=3 and f(-1) = 96.
Police recorded the average speed of cars driving on busy street by school. For sample of 36 speeds it was determined that the average amount over the speed limit was 12.3 mph with standard deviation of 5mph. The 99% confidence interval estimate f
verify that 7685.3the density of lead is 11.34 g/cm2 and density of aluminum is 2.69g/cm2. Determine radius of lead and aluminum spheres all having a mass of 50 Kg.
A study of high-crime locations in Miami, Florida, was conducted. The number of crimes in each of eight sample areas throughout a one-year period was recorded. Then a neighbourhood watch program was inaugurated.
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