Random sample of adults and has a margin of error
A newspaper reports that the governor's approval rating stands at 69%. The article adds that the poll is based on a random sample of 726 adults and has a margin of error of 4%. What level of confidence did the pollsters use?
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A glass tube of radius 0.80cm contains liquid mercury to a depth of 64.0cm at 12 deg. Find the depth of the mercury column at 100 deg. Assume that the linear expansion coefficient of the glass is 10 X 10^-6 K^-1 and the linear expansion coefficien
A 28.2 g sample of nickel metal is heated to 99.8 degrees Celsiusand place in a coffee-cup calorimeter containing 150.0 g of waterat 23.5 degrees Celsius. After the metal cools, the final temperature of the metal and the water is 25 degrees Celsiu
Carbon dioxide at 20 degrees C and a pressure of 575 kPa absolute flows in a pipe at a rate of 0.0041 kg/s. What is the maximum diameter if the developed flow is to be turbulent?
Your microwave oven draws 1100 of electrical power when it is running. If it takes 45 for this microwave oven to raise the temperature of the coffee to 60 , what is the efficiency of heating with this oven?
A basketball coach wants to know how many free throws an NBA player shoots during the course of an average practice. The coach takes a random sample of 43 players and finds the average number of free throws shot per practice was 225 with a standar
Let the compression ratio be rv = 18.265. Assume a cutoff ratio of 2.2. Assuming isentropic expansion and compression, find the thermal efficiency of this cycle.
What is the estimated regression equation? Perform a t test and determine whether or not x and y are related. Use α = 0.05.
Durations of clinical research studies awarded by a particular federal agency are assumed to follow a normal distribution, with a mean of 24 months and a standard deviation of 2.5 months.
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