A restaurant manager wants to know if one of the three specials on the menu (baked fish, roast beef, or chicken salad) is more popular than the others. She selects a random sample of special orders and counts the number of orders in each category. The results are compiled in the following table. Beef Chicken Fish 48 46 53 What are the expected frequencies for this experiment? 49; 49; 49 48; 46; 53 49; 49; 50 None of the above
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.
A restaurant manager wants to know if one of the three specials on the menu (baked fish, roast beef, or chicken salad) is more popular than the others. She selects a random sample of special orders and counts the number of orders in each category. The results are compiled in the following table.
| Beef | Chicken | Fish |
| 48 | 46 | 53 |
What are the expected frequencies for this experiment?
|
49; 49; 49 |
||
|
48; 46; 53 |
||
|
49; 49; 50 |
||
|
None of the above |
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Fish
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Beef
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Chicken
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| 48 | 46 | 53 |
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