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In a large section of a statistics class, the points for the final exam are normally distributed, with a mean of 72 and a standard deviation of 9. Grades are to be assigned according to the following rule: the top 10 % receive A's, the next 20 % receive B's, the middle 40% C's, the next 20% received D's, and the bottom 10% receive F's. Find the lowest score on the final exam that would qualify a student for an A, a B, a C, and a D.
The function that defines the probability distribution of a continuous random variable is a?For a continuous random variable x, the probability density function f(x) represents.
Assume that a patient is believed to have one of two diseases, denoted by D1 and D2 with P(D1)=0.40 and P(D2)=0.60 and that medical research has determined the probability associated with each symptom that may accompany the diseases.
Clearly a straight line model does not accurately describe what is going on with this data. Does this mean there is no relationship between income and time?
The probability of a failure during the warranty period is 5%.if 90% of the connector are kept dry and 10% are wet, What proportion of connectors fail during the warranty period?
the florida fruit supply company uses bottles that are labeled as containing 23 oz of orange juice. a random sample of
What contingency table test is used to see if there is a difference in the frequency distribution for two different groups?
if the random variable z is the standard normal score and a gt 0 is it true that pz lt -a pz gt a? why or why not?
a set of observations follow a normal distribution with mean 40 and standard deviation 4. what proportions of
In your own words, describe the concept of correlation, include the coefficient of correlation (r) and the coefficient of determination (r2) in your description.
A basketball player makes 80% of his free throws. If he attempts eight free throws during the next game, what is the probability that he will make more than his average?
a box of 10 gloves contains three left-handed gloves and seven right-handed gloves. complete parts a through d.a. if
a study found that foot lengths for japanese women are normally distributed with a mean of 24.9 and a standard
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