For companies with full and timely payments to the state unemployment system, the SUTA

Intro to Stats Chapter 6 The Normal Distribution  Normally distributed variable- shape of normal curve  Z scores have mean of 0 and standard deviation of 1  The standard version of normally distributed variable x, has the standard normal distribution 6.2 areas under the standard normal curve  Basic properties of standard normal curve 1. total area under curve is 1 2. never touches horizontal axis 3. left side mirror of right 4. almost all the data is between -3 and 3 ***figure 6.18 – every problem for the rest of the semester can come back to 1 of the 3 pictures***  easy – area to the left of z  tricky- 1- area to the left of z  long- area to the left of z – area to the left of z  z score is always 2 decimals  AREA TO THE LEFT  What is only thing you can do with a z score - go to the table - BACKWARDS WAY  the Za notation- alpha is the area to the RIGHT  1- area to the right = area to the left - find closest, if exactly half way, take average of 2 z scores FORWARDS  x to z to area  To determine a percentage/probability for normally distributed variable 1. sketch normal curve 2. shade region of interest and mark its delimiting x values 3. find z score 4. use table II to find area under the standard normal curve delimited by z score WORDS TO LOOK FOR  easy- words left, less than,