a. Write a table with observations for these samples. b. Using the table, explain (calculate) where the S=1.22 comes from c. Conduct a two-tailed comparison of the two groups with a=.05. Please remember to state your hypothesis.
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.
Now look at:
![3. One sample has SS=60 and a second sample has SS=48.
a. If n=7 for both samples, find each of the sample
variances, and calculate the pooled variance.
b. If n=5 for the first sample and n=7 for the second
sample, calculate the sample variance and pooled
variances.
c. What changed due to this change in sample size?
4. Check out the frequency distributions for two treatment
groups:
Treatment 1
Treatment 2|
n = 9
M= 8
n = 9
М- 13
s = 1.22
s = 1.22
0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21
a. Write a table with observations for these samples.
b. Using the table, explain (calculate) where the S=1.22
comes from
c. Conduct a two-tailed comparison of the two groups
with a=.05. Please remember to state your hypothesis.
Now look at:
Treatment 1
Treatment 2
n = 9
M= 8
n = 9
M = 13
s = 6.65
s = 6.65
0 1 2 3 4 5 6
7 8 9 10 1u 12 13 14 15 16 17 18 19 20 21
d. Write a table with observations for these samples.
e. Using the table, explain (calculate) where the S=6.65
comes from
f. Conduct a two-tailed comparison of the two groups
with a=.05.
g. What changed between [a-c] and [d-f]? what
impact did it have?
5. A reason people give for drinking coffee is "alertness" or
"energy". This could be the case for kids who drink coffee.
Or they could be groggier from a lack of sleep due to
coffee. We asked 50 1yoar Cid Kido who drink coffee](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F2b71de64-b46c-4429-8a71-ca886c7dce3b%2Fd41919d6-4ec3-442e-aaf8-47250dcc4f7d%2Filgfek_processed.png&w=3840&q=75)
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