Hey for b-1 I just need the mean. I also need the mean and standard deviation for C. Thank you
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.
Hey for b-1 I just need the mean. I also need the mean and standard deviation for C. Thank you

![**Exercise 6-8 (LO6-3)**
The Downtown Parking Authority of Tampa, Florida, reported the following information for a sample of 223 customers on the number of hours cars are parked and the amount they are charged.
| Number of Hours | Frequency | Amount Charged |
|-----------------|-----------|----------------|
| 1 | 15 | $4 |
| 2 | 38 | $5 |
| 3 | 52 | $9 |
| 4 | 45 | $13 |
| 5 | 20 | $14 |
| 6 | 12 | $16 |
| 7 | 5 | $18 |
| 8 | 36 | $20 |
| **Total** | 223 | |
- [Click here for the Excel Data File]
**a-1. Convert the information on the number of hours parked to a probability distribution. (Round your answers to 3 decimal places.)**
| Hours | Probability |
|-------|-------------|
| 1 | 0.067 |
| 2 | 0.171 |
| 3 | 0.233 |
| 4 | 0.202 |
| 5 | 0.090 |
| 6 | 0.054 |
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Consider the following table:
Number of Hours(xi) | Amount Charged(yi) | Frequency | Probability |
1 | 4 | 15 | 0.067 |
2 | 5 | 38 | 0.171 |
3 | 9 | 52 | 0.233 |
4 | 13 | 45 | 0.202 |
5 | 14 | 20 | 0.090 |
6 | 16 | 12 | 0.054 |
7 | 18 | 5 | 0.022 |
8 | 20 | 36 | 0.161 |
Total | 223 | 1 |
b-1.) The mean number of hours parked is
The variance is
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