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(a) What is the probability that a randomly selected medical resident works more than 80 hours in week? (b) What is the probability that a randomly selected medical resident works more than 100 hours in a week? (c) What is the probability that a randomly selected medical resident works less than 60 hours in a week?
The variance of the return per share is 4 for stock 1 and 100 for stock 2. The covariance of the return between the two stocks is 5 per share. Use the total variance of the investment as investment risk.
Fifty rounds of a new type of ammunition was fired from a M-1, and the muzzle velocity of the projectile was measured. The sample had a mean velocity of 853 meters per second, with a standard deviation of 2.9 meters per second
The probability of recovery for a certain disease is 0.65 or 65%. If 50 people are stricken, what is the probability that
A researcher predicts that watching a film on institutionalization will change students' attitudes about chronically mentally ill patients.
No more than 36% of the monthly gross income. what is the maximum monthly mortgage loan payment for which shawn can be approved?
Set up hypotheses and carry out all relevant tests. Describe all results and implications which you have discovered.
While dealing with 16 students, suppose that the alternative hypothesis has been one-sided and that it was set as Ha :
Dana and Cathy are playing tennis. The probability that Dana wins at least one out of two ames is 0.3. What is the probability that Dana wins at least one out of four?
Suppose that population variances from both conditions are equal is there evidence that treatment decreases surface hardness of steel plates?
At the .01 significance level, is there a difference in the use of the four entrances?
Find the z-score for each student. Assuming both tests measure the same kind of ability, which student had the higher score?
In a large population of college-educated adults, the mean IQ is 118 with a standard deviation of 20. What is the probability that a randomly selected adult from this population has an IQ that is greater than 120?
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