following data set represents a random sample of resting pulse rates of 21 males and 21 females. Males 74 75 69 72 75 73 88 76 71 64 67 71 72 82 71 83 82 78 80 81 75 Females 75 57 61 71 79 78 81 65 57 80 73 83 86 79 65 70 69 76 55 66 79 (2) Construct stem-and-leaf plots for each data set using four stems. You should have two separate plots: one for men and one for women. (1)Why is it important to have the same stems for both plots, even though one plot has an empty stem? (1) Comment on the distributions. What type on conclusions can you make about the heart rates of males and females? Do they appear to be very different?
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.
The following data set represents a random sample of resting pulse rates of 21 males and 21 females.
Males
74 75 69 72 75 73 88 76 71 64 67 71 72 82 71 83 82 78 80 81 75
Females
75 57 61 71 79 78 81 65 57 80 73 83 86 79 65 70 69 76 55 66 79
- (2) Construct stem-and-leaf plots for each data set using four stems. You should have two separate plots: one for men and one for women.
- (1)Why is it important to have the same stems for both plots, even though one plot has an empty stem?
- (1) Comment on the distributions. What type on conclusions can you make about the heart rates of males and females? Do they appear to be very different?
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