Question | Answer |
What do you call the numerical value that seperates the bottom 25% from the top 75% in a sample? | First quartile |
When building class boundaries first divide range by number of classes then | =16then cwis 17. Begin w first value add 17 so on |
When copying answers over to bar | always check again |
Z score is | x minus mean divided by standard deviation |
Assume binomial probability distribution, write the TI command that we can use to find P(x<a) | binomcdf(n, p, a) |
Assume standard normal probability distribution find P(z=2.5) | P(z=2.5)= 0. The only time a single point will have value is for binomialpdf |
Name the TI command that we can use to find Pk when working with standard normal probability distribution | invnorm(k, µ, σ) |
If P(A)=0.6, what are the odds in favor of even A to occur? | .6/.4 leave in fraction form 3/2 |
P(A or B) | P(A) + P(B) – P(A and B) |
When you are given .2% what should you do? | TAKE HEED and move decimal to the left twice |
The probability that there will be at least 45 convictions | 1- binomcdf(n,p,x) or 1-binomcdf(50, .8,44) x follows "at least" |
Estimate the probability that ther will be at most 35 convictions | Do not subtract 1 from 35, just leave it and add .5 |
Odds must be written as… | a fraction |
When finding probability on a tree | don’t forget to multiply every branch |
If you are given a decimal percentage DO NOT FORGET | to move the decimal to the left |
When drawing venn diagrams | make certain that the total n is contained in rectangle, including values not in circle |
There is a big difference between | binomcdf and binompdf make certain to write correct calculator function |