# Stats Library

## Statistics Assignment Library

1. ##### Solved:If electricity power failures occur according to a Poisson distribution with an average of 3 failures
If electricity power failures occur according to a Poisson distribution with an average of 3 failures every twenty weeks, calculate the probability that there will not be more than one failure during a particular week. Solution Let $X$ denote the...
2. ##### Solved:A consulting engineer receives on average 0.7 requests per week. Find the probability that
A consulting engineer receives on average 0.7 requests per week. Find the probability that a) In a given week, there will be at least one request; b) In a given 4 week period there will be at least 3 requests....
9. ##### Solved:The GRE is widely used to help predict the performance of applicants to graduate schools. The range of possible scores on a GRE
The GRE is widely used to help predict the performance of applicants to graduate schools. The range of possible scores on a GRE is 200 to 900. The psychology department at a university finds that the students in their department...
10. ##### Solved:The Mental Development Index (MDI) of the Bayley Scales of Infant Development is a standardized measure used in longitudinal follow-up
The Mental Development Index (MDI) of the Bayley Scales of Infant Development is a standardized measure used in longitudinal follow-up of high-risk infants. The scores on the MDI have approximately a normal distribution with a mean of 100 and standard...