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1 What is the 95 percent confidence interval of the proportion of engineering students who thought their job prospects were good?
Wiki User
∙ 14y ago
2. Are the proportion of the engineering students who view their job prospects as good statistically different from the general college population (show work)
Qustion
An opinion poll of 100 college student at prestigious engineering school was accomplished on how they viewed their job prospects. 62% of the students said their prospects were good. The portion of good responses for college students in general was 58%
Wiki User
∙ 14y ago
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What percentage of time will the population proportion not be found within the confidence interval?
What percentage of times will the mean (population proportion) not be found within the confidence interval?
How do you calculate confidence interval?
Confidence intervals may be calculated for any statistics, but the most common statistics for which CI's are computed are mean, proportion and standard deviation. I have include a link, which contains a worked out example for the confidence interval of a mean.
Why confidence interval useful?
Why confidence interval is useful
What happens to the confidence interval if you increase the sample size?
The confidence interval becomes smaller.
Is confidence interval and confidence limits are same thing?
no,these are not the same thing.The values at each end of the interval are called the confidence limits.
What does a 95 percent confidence interval tell you about the population proportion?
There is a 95% probability that the true population proportion lies within the confidence interval.
What percentage of time will the population proportion not be found within the confidence interval?
What percentage of times will the mean (population proportion) not be found within the confidence interval?
How do you calculate confidence interval?
Confidence intervals may be calculated for any statistics, but the most common statistics for which CI's are computed are mean, proportion and standard deviation. I have include a link, which contains a worked out example for the confidence interval of a mean.
The proportion of the variation in the dependent variable y that is explained by the estimated regression equation is measured by the?
confidence interval estimate
Why confidence interval useful?
Why confidence interval is useful
What happens to the confidence interval if you increase the confidence level?
The confidence interval becomes wider.
What Confidence interval is 0.05 alpha?
how are alpha and confidence interval related
The width of a confidence interval is equal to twice the value of the margin of error?
No. The width of the confidence interval depends on the confidence level. The width of the confidence interval increases as the degree of confidence demanded from the statistical test increases.
What happens to the confidence interval as the mean decreases?
The confidence interval is not directly related to the mean.
What happens to the confidence interval if you increase the sample size?
The confidence interval becomes smaller.
Uwant totestcreatedWeb site so you have 250 people access it. Of the peps accessing the site 75 of them exp. computer crashes. Construct a 95 percent confidence interval for the proportion of crashes?
Estimated p = 75 / 250 = 0.3 Variance of proportion = p*(1-p)/n = 0.3(0.7)/250 =0.00084 S.D. of p is sqrt[0.00084] = 0.029 Confidence interval: phat-zval*sd = 0.3 - (1.96)(0.028983) phat-zval*sd = 0.3 + (1.96)(0.028983) Confidence interval is ( 0.2432 , 0.3568 )
Is a 95 percent confidence interval for a mean wider than a 99 percent confidence interval?
No, it is not. A 99% confidence interval would be wider. Best regards, NS
