Do male and female servers at Swank Bar work the same number of hours? A sample of 65 fenale servers worked an average of 35 hours per week, with a standard deviation of 4.2. A sample of 62 male servers worked an average of 37 hours per week, with a standard deviation of 3.9. Let µ1 and u2 represent the typical number of hours worked by all female and male servers at Swank Bar, respectively. Estimate with a 83% confidence level how many more hours female servers work. Round answers to three decimal places. Fcdf = 4.056 Do we pool then? O Yes O No 83% Confidence Interval: -2.992 X< µ1 - µ2 < -1.008 Which of the following does your data suggest? O Female and male servers work about the same number of hours O Female servers work more hours O Male servers work more hours
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.
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