e Required to Estimate a Standard Deviation Population and to be 95% confident of that statement, and to be 99% confident of that For s to be within of a statement, the sample size, n, should be at least... thin 20% fident of ple size 85 1% 19205 33218 g 99% 5% 768 n 1336 200] 10% 192 336 20% 48 85 30% 21 38 40% 12 22 50% 8 14 REES OF
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.
A marketing firm wishes to estimate the standard deviation of the ages of college students. How many students must the marketing firm randomly survey if they want to be 99% confident that the sample standard deviation of the ages of college students is within 5% of the true population standard deviation of ages of college students?
![e Required to Estimate a
Standard Deviation
Population
and to be 95%
confident of that
statement,
and to be 99%
confident of that
For s to be within
of a
statement,
the sample size, n, should be at least...
thin 20%
fident of
ple size
85
1%
19205
33218
g 99%
5%
768
n 1336
200]
10%
192
336
20%
48
85
30%
21
38
40%
12
22
50%
8
14
REES OF](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2Fdc347eaa-069d-48e8-906c-12174c32464b%2F1b68f92a-3586-48b6-9d6d-e4fb673a1d84%2F4vkmbpo.jpeg&w=3840&q=75)
Trending now
This is a popular solution!
Step by step
Solved in 3 steps with 2 images
