In a minimum of 100 words. What impact do goals have on behavior? What types of goals will lead to the highest level of performance? Why?
In: Psychology
An insurance company issues 1250 vision care insurance policies. The number of claims filed by a policyholder under a vision care insurance policy during one year is a Poisson random variable with mean 2. Assume the numbers of claims filed by a distinct policyholders are independent of one another. What is the approximate probability that there is a total of between 2450 and 2600 claims during a one year period?
In: Statistics and Probability
In the Brazilian population the share of individuals with blood from the O + group is 36% and O- is 4%.
Let X be the number of people with blood type O, in a
random sample of 800 Brazilian citizens.
Determine the narrowest interval of type A = [a, b],
such that P {X€A}> 0.95.
B. In a random sample of 100 Brazilians, what is the
probability that exactly 30 of them
are from group O? and 2 of group O-?
In: Statistics and Probability
5959%
of men consider themselves professional baseball fans. You randomly select 10 men and ask each if he considers himself a professional baseball fan. Find the probability that the number who consider themselves baseball fans is (a) exactly five, (b) at least six, and (c) less than four.
(a)
P(5)equals=nothing
(Round to three decimal places as needed.)
In: Statistics and Probability
5959%
of men consider themselves professional baseball fans. You randomly select 10 men and ask each if he considers himself a professional baseball fan. Find the probability that the number who consider themselves baseball fans is (a) exactly five, (b) at least six, and (c) less than four.
(a)
P(5)equals=nothing
(Round to three decimal places as needed.)
In: Statistics and Probability
Suppose you own three computers, each of which independently lasts for an exponentially distributed time with a mean of 4 years. Let X(t) be the number of these computers that have broken down after t years.
(a) What is the probability that all three computers are still working after six months?
(b) On average, how long will it take before there is only one working computer left?
In: Statistics and Probability
Having used people-counting devices at the entry to shopping centre, it is known that the average number of shoppers visiting this centre during any one-hour period is 448 shoppers, with a standard deviation of 21 shoppers. What is the probability that a random sample of 49 different one-hour shopping periods will yield a sample mean between 441 and 446 shoppers?
please type it do not handwritten
In: Statistics and Probability
In: Statistics and Probability
Five males with a particular genetic disorder have one child each.
The random variable x is the number of children among the five who
inherit the genetic disorder. Determine whether the table describes
a probability distribution. If it? does, find the mean and standard
deviation.
|
x |
0 |
1 |
2 |
3 |
4 |
5 |
|
|
?P(x) |
0.0008 |
0.0126 |
0.0798 |
0.2529 |
0.4003 |
0.2536 |
In: Statistics and Probability
On the midnight shift,
the number of patients with head trauma in an emergency room has
the probability distribution shown below.
| x | 0 | 1 | 2 | 3 | 4 | 5 | Total |
| P(x) | .09 | .32 | .27 | .17 | .11 | .04 | 1.00 |
(a) Calculate the mean and standard deviation.
(Round your mean value to 2 decimal places and standard
deviation to 3 decimal places.)
In: Statistics and Probability