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When finding a confidence interval for true mean spent of all citizens should you us a z-score or t-score?
Wiki User
∙ 16y ago
If the sample size is less then 30 use the T table, if greater then 30 use the Z table.
Wiki User
∙ 16y ago
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How do i construct a confidence interval?
Typically, the mean is the center and the interval extends a fixed number of standard-errors-of-the mean in wither direction. M+/- 1 SEM for example. I guess because you don't know, I should give you the simplest.
What should the interval for 75 - 300?
its 25 bro
What does the interval -4 3 represent?
I could not put in the proper symbols when I asked the question. The question should be: What does the interval [-4,3) represent?
What is a great sentence with the word interval in it?
You should examine the solution for growth at regular intervals.
What is the purpose of Interval World?
"Interval World" allows one to find a suitable resort for ones vacation and provides a vast offer of resorts from all across the globe. This makes it a reliable source of information should one plan to visit a resort.
In a confidence interval what information does the margin of error provide?
The confidence interval consists of a central value and a margin of error around that value. If it is an X% confidence interval then there is a X% probability that the true value of the statistic in question lies inside the interval. Another way of looking at it is that if you took repeated samples and calculated the test statistic each time, you should expect X% of the test statistics to fall within the confidence interval.
Does the population mean have to fall within the confidence interval?
No. For instance, when you calculate a 95% confidence interval for a parameter this should be taken to mean that, if you were to repeat the entire procedure of sampling from the population and calculating the confidence interval many times then the collection of confidence intervals would include the given parameter 95% of the time. And sometimes the confidence intervals would not include the given parameter.
How do i construct a confidence interval?
Typically, the mean is the center and the interval extends a fixed number of standard-errors-of-the mean in wither direction. M+/- 1 SEM for example. I guess because you don't know, I should give you the simplest.
When the population standard deviation is unknown and the sample size is less than 30 what table value should be used in computing a confidence interval for a mean?
t-test for means
How should I construct a confidence interval for the population proportion p with n equals 144 and x equals 82 with a 90 percent confidence level?
The confidence interval will be Pi+-z*spz5%= 1.6449Pi = x/nSp = Sqrt(Pi(1-Pi)/n)Pi ~= 0.5694Sp = Sqrt(.5694*0.4306/144) ~= 0.0413Pi - 0.0679 < p < Pi + 0.06790.5016 < p < 0.6373You can do this on your TI-83/84 with 1-PropZInt (Stat->Tests->A)
When should you use confidence interval and when should you use prediction interval?
Specifically, which to use in this scenario?Recommend a wireless phone plan from the alternatives listed above. The company is going to commit to using this phone plan for a long time. [Hint: use the relevant Margin of Error here.]It's from a test question. We're a given a regression analysis on phone minutes usage for a sample of company but the company stated in this question was not included in the sample (Therefore, prediction interval should be used?)
How often should oil in a car be changed?
Depends on the make, model, & year vehicle you own. Of course if you follow the manufactures recommended oil change interval you will be fine. If not, you can change the oil/filter every 5,000 with confidence you are doing all you can to protect your investment unless your owner's manual lists a shorter interval.
What should comes first confidence and then achievements or achievements then the confidence?
confidence then achievements cause you need confidence to achieve some thing.
At what mileage does the 2003 Chrysler Town and Country need the timing chain changed?
There is not a service interval for the chain. It should last for the life of the motor.There is not a service interval for the chain. It should last for the life of the motor.
Why human being should have self confidence?
yes a human should have confidence to get further in life and stand you in better sted
What should the interval for 75 - 300?
its 25 bro
What is an interval in 6th grade math?
An interval is a mathematical expression of betweenness of two or more numbers! You should know this already!
