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When the sample size increase what will happen to the 95 percent confidence interval?
It becomes narrower.
What happens as the number of classes in a histogram increase?
The columns become narrower, their heights become more accurate but possibly more variable. The chart contains more of the underlying detailed information.
PLOT A VARIABLE WITH NORMAL DISTRIBUTION WITH MEAN 200 AND DEVIATION 20. SUPERIMPOSED WITH THE PREVIOUS FIGURE, PLOT THE DISTRIBUTION OF THE ARITHMETIC MEAN OF SAMPLES OF SIZE N=4, 25 AND 100, OF THAT POPULATION?
A normal distribution with a mean of 200 and a deviation of 20 can be plotted as a bell-shaped curve, as shown in the figure below. Superimposed on the figure, the distribution of the arithmetic mean of samples of size n=4, 25 and 100 can be plotted as shown in the figure below. The arithmetic mean distribution for n=4 is a much narrower distribution than a normal distribution, since it is based on a small sample size. As the sample size increases, the distribution becomes wider and more similar to the normal distribution.
Which is the best estimate of the length of a mattress?
In general, mattresses are about 75 inches long. King mattresses are about 80 inches. Cal King mattresses are narrower, but are usually 84 inches long.
Why is it so difficult to show the amount of carbon dioxide on a pie chart?
If the pie chart represents all the gases in the atmosphere. Then a sector of 79% ( 284.4 degrees) is for nitrogen A sector of 20% ( 72 degrees) represents oxygen. This leaves 1% (3.6 degrees) for all the other gases. , which are argon, neon ,helium, krypton, water vapour, and carbomn dioxide. Since carbon dioxide is quoted as 300 ppm ( 300 part per million parts) , then it is a very tiny amoun t of the 1% ( 0.108 (~ 1/10) degrees of arc of the circular sector) 3.6 degrees is a very narrow arc on the circle ( pie chart). Hence 0.1 degree is narrower than a straight pencil line on the same chart . So it is very difficult to show the CO2 value on a pie chart.
True or False The higher the confidence level the narrower the confidence interval?
True.
When the sample size increase what will happen to the 95 percent confidence interval?
It becomes narrower.
In a poll of 100 adults 45 percent reported they believe in faith healing If the poll was based on 5000 adults would the confidence interval be wider or narrower?
The formula for margin of error is (Z*)*(Standard Deviation))/(sqrt(N)), so as N increases, the margin of error decreases. Here N went from 100 to 5000, so N has increased by 4900. This means the margin of error decreases. Since the confidence interval is the mean plus or minus the margin of error, a smaller margin of error means that the confidence interval is narrower.
When the larger values of the standard deviation result in a normal curve that narrower and more peak?
Smaller
Is it true that the wider the confidence interval the less precise is the estimate?
All things being equal, a wider confidence interval (CI) implies a higher confidence. The higher confidence you want, the wider the CI gets. The lower confidence you want, the narrower the CI gets The point estimate will be the same, just the margin of error value changes based on the confidence you want. The formula for the CI is your point estimate +/- E or margin of error. The "E" formula contains a value for the confidence and the higher the confidence, the larger the value hence the wider the spread. In talking about the width of the CI, it is not correct to say more or less precise. You would state something like I am 95% confident that the CI contains the true value of the mean.
What happens as the number of classes in a histogram increase?
The columns become narrower, their heights become more accurate but possibly more variable. The chart contains more of the underlying detailed information.
What does it mean if an edge line slants in toward the center of the road?
The road is narrower ahead. The road is narrower ahead. The road is narrower ahead.
How is narrow narrower than broad?
narrow is narrower than broad because it is.
What is the comparative form of narrow?
narrower. The new Fords are narrower than the old models.
Which concept is organized by going from a broad level of concepts to narrower and narrower concepts?
taxonomy
When a population pyramid has a wide base and it is the most narrow at the top the population is?
When a population pyramid has a wide base and is narrower at the top, it indicates a high birth rate and high population growth. This kind of pyramid is typical of developing countries where a large proportion of the population is young and the birth rates are high.
Is narrower an adverb?
No.'Narrower' is in comparative adjective form, e.g. "This hallway is narrower than the others".The adverb form would be 'narrowly', e.g. "the train narrowly missed the man by the rails".
