The student will calculate confidence intervals for means when the population standard deviation is unknown.
Given
The following real data are the result of a random survey of 39 national flags (with replacement between picks) from various countries. We are interested in finding a confidence interval for the true mean number of colors on a national flag. Let
the number of colors on a national flag.
X
Freq.
1
1
2
7
3
18
4
7
5
6
Calculating the confidence interval
Calculate the following:
3.26
1.02
39
Define the Random Variable,
, in words.
the mean number of colors of 39 flags
What is
estimating?
Is
known?
No
As a result of your answer to (4), state the exact distribution to use when calculating the Confidence Interval.
Confidence interval for the true mean number
Construct a 95% Confidence Interval for the true mean number of colors on national flags.
How much area is in both tails (combined)?
0.05
How much area is in each tail?
0.025
Calculate the following:
lower limit =
upper limit =
error bound =
2.93
3.59
0.33
The 95% Confidence Interval is:
2.93; 3.59
Fill in the blanks on the graph with the areas, upper and lower limits of the Confidence Interval and the sample mean.
In one complete sentence, explain what the interval means.
Discussion questions
Using the same
,
, and level of confidence, suppose that
were 69 instead of 39. Would the error bound become larger or smaller? How do you know?
Using the same
,
, and
, how would the error bound change if the confidence level were reduced to 90%? Why?
Bacteria doesn't produce energy they are dependent upon their substrate in case of lack of nutrients they are able to make spores which helps them to sustain in harsh environments
_Adnan
But not all bacteria make spores, l mean Eukaryotic cells have Mitochondria which acts as powerhouse for them, since bacteria don't have it, what is the substitution for it?
Assimilatory nitrate reduction is a process that occurs in some microorganisms, such as bacteria and archaea, in which nitrate (NO3-) is reduced to nitrite (NO2-), and then further reduced to ammonia (NH3).
Elkana
This process is called assimilatory nitrate reduction because the nitrogen that is produced is incorporated in the cells of microorganisms where it can be used in the synthesis of amino acids and other nitrogen products
There are nothing like emergency disease but there are some common medical emergency which can occur simultaneously like Bleeding,heart attack,Breathing difficulties,severe pain heart stock.Hope you will get my point .Have a nice day ❣️
_Adnan
define infection ,prevention and control
Innocent
I think infection prevention and control is the avoidance of all things we do that gives out break of infections and promotion of health practices that promote life
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Source:
OpenStax, Collaborative statistics using spreadsheets. OpenStax CNX. Jan 05, 2016 Download for free at http://legacy.cnx.org/content/col11521/1.23
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