Two friends, Parker and David, took summer jobs. The graph below represents David's earnings in dollars and cents, y, for working x hours. David's Earnings S600 S500 $450 $400 (20,$406) $350 8300 Saso $200 (10,$203) Sigo $100 5 10 15 20 25 30 35 40 45 50 55 60 Hours Worked The table below represents Parker's earnings in dollars and cents, y, for working a hours. Parker's Earnings Hours (x) Earnings (y) 10 $226 15 $339 20 $452 25 $565 Use the dropdown menu and answer- blank below to form a true statement. Parker earns $ per hour v than David. Earnings (Dollars)
Inverse Normal Distribution
The method used for finding the corresponding z-critical value in a normal distribution using the known probability is said to be an inverse normal distribution. The inverse normal distribution is a continuous probability distribution with a family of two parameters.
Mean, Median, Mode
It is a descriptive summary of a data set. It can be defined by using some of the measures. The central tendencies do not provide information regarding individual data from the dataset. However, they give a summary of the data set. The central tendency or measure of central tendency is a central or typical value for a probability distribution.
Z-Scores
A z-score is a unit of measurement used in statistics to describe the position of a raw score in terms of its distance from the mean, measured with reference to standard deviation from the mean. Z-scores are useful in statistics because they allow comparison between two scores that belong to different normal distributions.
Consider two friends who takes summer jobs.
The graph of David's earnings shows that the earnings are:
| Hours(x) | Earning (y) |
| 10 | 203 |
| 20 | 405 |
The earnings of Parker is given as:
| Hours(x) | Earning (y) |
| 10 | 226 |
| 15 | 339 |
| 20 | 452 |
| 25 | 565 |
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