At a recent automobile show, a sample of 125 people produced the following results. Use the .05 significance level to determine if there is a relationship between age and model preferred. Age (in Years) Sports SUV Luxury Total Under 30 18 12 10 40 30 to 50 17 15 13 45 Over 50 9 9 22 40 Total 44 36 45 125 what is the population? what is the (H0 and HA)? what is a=?, graph? (2 tailed, right tailed, left tail), distribution?, left and right critical value? what is calculated value? (Z-Calculated, t-Calculated, χ2-Calculated, F-Calculated) =? Interpret the results?
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.
At a recent automobile show, a sample of 125 people produced the following results. Use the .05 significance level to determine if there is a relationship between age and model preferred.
|
Age (in Years) |
Sports |
SUV |
Luxury |
Total |
|---|---|---|---|---|
|
Under 30 |
18 |
12 |
10 |
40 |
|
30 to 50 |
17 |
15 |
13 |
45 |
|
Over 50 |
9 |
9 |
22 |
40 |
|
Total |
44 |
36 |
45 |
125 |
what is the population?
what is the (H0 and HA)?
what is a=?, graph? (2 tailed, right tailed, left tail), distribution?, left and right critical value?
what is calculated value? (Z-Calculated, t-Calculated, χ2-Calculated, F-Calculated) =?
Interpret the results?
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