Round your answers to two decimal places. Use the critical value with three decimal places. a. At 99% confidence, what s the margin of error? $ b. Develop a 99% confidence interval estimate of the mean amount spent for lunch. $ to $ %24
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.
| 20.50 |
| 14.63 |
| 23.77 |
| 29.96 |
| 29.49 |
| 32.70 |
| 9.20 |
| 20.89 |
| 28.87 |
| 15.78 |
| 18.16 |
| 12.16 |
| 11.22 |
| 16.43 |
| 17.66 |
| 9.59 |
| 18.89 |
| 19.88 |
| 23.11 |
| 20.11 |
| 20.34 |
| 20.08 |
| 30.36 |
| 21.79 |
| 21.18 |
| 19.22 |
| 34.13 |
| 27.49 |
| 36.55 |
| 18.37 |
| 32.27 |
| 12.63 |
| 25.53 |
| 27.71 |
| 33.81 |
| 21.79 |
| 19.16 |
| 26.35 |
| 20.01 |
| 26.85 |
| 13.63 |
| 17.22 |
| 13.17 |
| 20.12 |
| 22.11 |
| 22.47 |
| 20.36 |
| 35.47 |
| 11.85 |
| 17.88 |
| 6.83 |
| 30.99 |
| 14.62 |
| 18.38 |
| 26.85 |
| 25.10 |
| 27.55 |
| 25.87 |
| 14.37 |
| 15.61 |
| 26.46 |
| 24.24 |
| 16.66 |
| 20.85 |
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