Mrs. Marcia, CEO of Pennant Reading and Math Quick Fix, claims that their new PX 101 Math workshop help students to improve their Math grades. The following data represent grades on exam before and After PX 101 intervention.
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.
1. Mrs. Marcia, CEO of Pennant Reading and Math Quick Fix, claims that their new PX 101 Math workshop help students to improve their Math grades. The following data represent grades on exam before and After PX 101 intervention.
Students Grade before PX 101 Grade After PX 101
1 55 62
2 78 75
3 73 77
4 71 79
5 85 87
6 90 90
7 66 75
8 84 85
9 80 84
10 73 76
11 80 85
12 78 90
Does the sample evidence suggest that Mrs. Marcia statement is correct? Use alpha of .1 to test this claim. Assuming that Math grades are generally normal.
Calculation page
Before After d D^2
Question 1 continue
a. Set up the Hypotheses and indicate the claim
H0:
Ha:
b.
Decision rule (In complete sentence) please show rejected region
c. Computation
d. Decision
e. Interpretation
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