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Find the probability distribution of the value x . mean variance and standard derivation.
1. A company uniformly receives 20 phone calls from 9am -7 pm What is the probability that the number of calls between 12 :00 and 1:00 will be:
a. 1?
b. at least 1?
c. more than 1?
Let x be uniformly distributed on [-1,3]
Find 1. P( 1 < x < 2)=
2. P (-1/2 < x < 4) =
3. P ( 0 < x < 5 )=
4. P (-2 < x < 3 ) =
the distribution of the sum of 100 independent identically distributed random variables isa. approximately normalb.
of employees in a particular industry 60 are female. if employees are selected one at a time stopping as soon as a
what is the probability that a salesperson selected at random will have an excellent potential for advancement given
suppose your right knee is sore 15 of the time and your left knee is sore 10 of the time. what is the largest possible
Collapse the response categories in the following table so that it meets the assumption of the chi-square test; then perform the test.
Suppose that the probability of parents having a child with blond hair is 1/4. If there are 6 children in the family, what is the probability that half of them will have blond hair?
In an ABCNews.com nationwide poll done in 2001, the proportion of respondents who thought that it should be illegal to use a hand held cell phone while driving a car was 69 %. The poll's sample was 1027.
Management of the restaurant is concerned with the time a patron must wait before being seated for dinner. Explain why the times are a population? Find the mean and median of the times.
the null hypothesis is to be tested at 95% confidence. Determine the critical value(s) for this test.
in a two-tailed hypothesis test for a mean the critical values were -1.83 and 1.83. if the test value of the mean is
A standard deviation of 68. a score is considered outstanding if it is at least 420. what is the % of the scores would be outstanding?
The time needed to drive from town A to town B is normally distributed with a mean of 180 minutes and standard deviation of 20 minutes. What is the probability that a person will drive from town A to town B
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