The average length in a sample of 700 steel bar manufactured from oneprocess is found to be 250 kg with a standard deviation of 30 kg while the corresponding values in a sample of 300 bars from the other process are 300kg and 40kg. Is there significant difference between the means of two process at 0.01 level of significance?
How would you know if you could approximate this with the normal distribution
The table below shows the probability of a machine manufacturing defective parts in one day.
Find the variance.
Number of items | 0 | 1 | 2 | 3 | 4 | 5 |
Probability | 0.74 | 0.17 | 0.04 | 0.025 | 0.1 | 0.015 |
In a loan database, there are 11 loans to clients with 19 years of business experience. Also, there are 77 loans made to clients with a College education. In the database there are 82 loans to clients with 19 years of experience or who have a College education. How many loans were made to clients with a College education who also had 19 years of experience?
Toss 5 coins 20 times simultaneously and observe the number of heads that will occur.the possible values of X or the number of heads in 5 coins tossed are 0, 1, 2, 3, 4 and 5.