For the two different sampling groups given below, test for the significance of the difference using the five-step method I gave you in class. Be sure and state whether you accept or reject the null hypothesis. Alpha is 0.05 for setting your Z critical value. Remember this is a large sample, so use the appropriate formula. Please provide Z critical, Z obtained, and your decision. a) Sample 1 Sample 2 Mean1 = 72.5 Mean2 = 76.0 s1 = 14.3 s2 = 10.2 N1 = 136 N2 = 257 b) Sample 1 Sample 2 Mean1 = 107 Mean2 = 103 s1 = 14 s2 = 17 N1 = 175 N2 = 200
Contingency Table
A contingency table can be defined as the visual representation of the relationship between two or more categorical variables that can be evaluated and registered. It is a categorical version of the scatterplot, which is used to investigate the linear relationship between two variables. A contingency table is indeed a type of frequency distribution table that displays two variables at the same time.
Binomial Distribution
Binomial is an algebraic expression of the sum or the difference of two terms. Before knowing about binomial distribution, we must know about the binomial theorem.
For the two different sampling groups given below, test for the significance of the difference using the five-step method I gave you in class. Be sure and state whether you accept or reject the null hypothesis. Alpha is 0.05 for setting your Z critical value. Remember this is a large sample, so use the appropriate formula. Please provide Z critical, Z obtained, and your decision.
- a)
|
Sample 1 |
Sample 2 |
|
Mean1 = 72.5 |
Mean2 = 76.0 |
|
s1 = 14.3 |
s2 = 10.2 |
|
N1 = 136 |
N2 = 257 |
- b)
|
Sample 1 |
Sample 2 |
|
Mean1 = 107 |
Mean2 = 103 |
|
s1 = 14 |
s2 = 17 |
|
N1 = 175 |
N2 = 200 |
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