Is a statistics class' delivery type a factor in how well students do on the final exam? The table below shows the average percent on final exams from several randomly selected classes that used the different delivery types. Online Hybrid Face-to-Face 86 90 60 88 89 68 71 75 56 100 93 56 65 60 74
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.
![Is a statistics class' delivery type a factor in how well students do on the final exam? The table below shows
the average percent on final exams from several randomly selected classes that used the different delivery
types.
Online
Hybrid
Face-to-Face
86
90
60
88
89
68
71
75
56
100
93
56
65
60
74
97
72
98
78
97
69
79
76
91
Assume that all distributions are normal, the three population standard deviations are all the same, and
the data was collected independently and randomly. Use a level of significance of a = 0.1.
Ho: µi = µ2 = 43
H1: At least two of the means differ from each other.
1. For this study, we should use Select an answer v
2. The test-statistic for this data =
(Please show your answer to 3 decimal places.)
3. The p-value for this sample =
(Please show your answer to 4 decimal places.)
4. The p-value is less than (or equal to) alpha v a](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F69ffb34c-ff2c-4107-815b-4535fc837ae3%2F4099bc16-0434-422b-bf42-238d8ccd567d%2Fhtlstcs_processed.jpeg&w=3840&q=75)
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