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If a sample is subdivided into subsamples, a minimal sample size of 30 is necessary for every subsample?
If this is a correct distribution, then what is the Pr(x=0.6)? Find the cumulative distribution of x. What is the expected value of x?
It is known that the standard deviation of the population is $36,000. At 95% confidence test to determine if there has been a significant decrease in the average price homes.
How will the area of the rejection region for a two-tailed test compare to area of the rejection of the corresponding one-tailed test with the same significance level?
Find the probability that a mosquito will survive 5 applications. Find the probability that a mosquito will survive 5 applications, given that it has survived the first 2 applications.
The probability that it will rain today is equal to 0.5. The probability that it will rain tomorrow given that it rains today is 0.9. Calculate the probability that it will rain today and tomorrow.
The door frames used in an industrialised building system are of one standard size. If the heights of adults are normally distributed, men with a mean of 1.73m and standard deviation of 0.064m and w
A random sample of six cars from a particular model has the following fuel consumption figure, in miles per gallon: 18, 16, 20, 21, 19, 17. Find a 95% confidence interval for the population mean.
A company claims that a new commission policy has resulted in average weekly earning of £380. A random sample of thirty workers is selected and finds that their average weekly earning is &poun
It is believed that of the tea consumers at McCalister's Deli, 50% order sweet tea (event A), 40% request a lemon in their tea (event B) and 25% request sweet tea with lemon (both A and B). Find the
A kindergarten student has a cup with 9 colored pencils. Four pencils are blue, three are green, and two are red. The student randomly selects 3 pencils from the cup without replacement. What is the
Why might a researcher choose to use a multiple regression specification?
The study, published in the Archives of General Psychiatry, included 1.1 million men and women and found a longer life span among those who sleep six to seven hours a night.
How do I solve this problem, simulate the probability that a random integer between 1 and 5000 is divisible by 4, 7 or 10.?
John takes a twenty question multiple choice test in which question has five possible answers. Some of the answers he knows, and on the others he makes a random guess. The conditional probability th
The Beer institue conducted a study with looking at beer purcheses per capita across states. Some states buy more beer (43 Gallons PP in New Hampshire) Data is normally distributed with an average o
Suppose a baseball player had 243 hits in a season. In the given probability distribution, the random variable X represents the number of hits the player obtained in a game.
For the standard normal probability distribution , the area to the right of the mean is (-0.5, 0.5, 1, any value between 0 and 1)
Suppose the reaction time (in seconds) to certain stimulus is a continuous random variable X with cumulative distribution function of the form
An investment adviser for G. Prowe Rice has many clients owning shares of mutual funds. These mutual funds are categorized as Domestic Equity funds, International Equity funds, or Fixed Income funds
Sketch a picture of these data, and make sure to label the axis to show the values that deviate 1, 2, and 3 standard deviations away from the mean.
How many different ice cream treats for Judy are possible? What is the probability that Judy chooses strawberry ice cream in a waffle cone? What is the probability that Judy chooses hot fudge, caramel
In the state of Florida, non-personalized automobile license plates use 7 characters. The first 4 charactersare letters (always upper case), followed by 3 numeric digits. Answer each question separa
Suppose that there are seven prospective jurors, four men and three women who might be impaneled tosit on a jury in a criminal case. Two jurors are randomly selected from these seven to fill the two