Compute the sample size
A standard IQ test has a mean of 98 and the standard deviation of 16. We desire to be 99% certain that we are in 8 IQ points of the true mean. Compute the sample size?
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A private medical clinic desires to determine the true annual income of its patients. The clinic needs to be in $200 of the true mean. The clinic determines that the true population deviation is around $1,300.
Let y be cost of making the call lasting x minutes using the calling card. Write the linear equation which associates the cost of the making a call, y, to the time x.
A polling company gets an alphabetical list of names of voters in the precinct. They choose every 20th person from the list till a sample of 100 is obtained. They then call such 100 people. Does this sampling plan result in a random sample? Simple
The column of soldiers, marching at 144 paces per minute, keep in step by the beat of a drummer at the head of the column. This is observed that the soldiers in the rear end of the column are striding forward with the left foot if the drummer is a
Find the probability distribution for the random variable and find out the mean and standard deviation of the random variable x.
It has been recorded that the ten people get killed through shark attack every year. What is the probability of having 3 or 4 people get killed through shark attack this year?
The mass of the book is 3.5 kg, you pick the book up off a table and lift it 0.46m at constant speed of 0.28m/s Determine the work done by the gravity on the book?
Microfracture knee surgery has the 75% chance of success on patients with the degenerative knees. The surgery is performed on 5 patients. Find out the probability of the surgery being successful on more than three patients?
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