statistics

Find the critical value zc necessary to form a confidence interval at the given level of confidence.

a. 90% = 1.645
b. 85% = 1.8025

1. 👍
2. 👎
3. 👁
1. 90% is correct!

85% is incorrect. Try again.

1. 👍
2. 👎

Similar Questions

1. Statistics

Let ๐1,โฆ,๐๐ be i.i.d. random variables with distribution ๎บ(๐,๐) , for some unknown parameter ๐>0 . Find an interval I๐ (that depends on ๐ ) centered about ๐โฏโฏโฏโฏโฏ๐ such that P(I๐

2. Statistics

Multiple Choice Which of the following statements is true about the 95% confidence interval of the average of a sample? A) 95 of 100 avgs of samples will be within the limits of the confidence interval. B) There is a 95% chance

3. Statistics

Consider an i.i.d. sample X1,โฆ,XnโผPoiss(ฮป) for ฮป>0 . Starting from the Central Limit Theorem, find a confidence interval I=[A,B] with asymptotic level 1โฮฑ that is centered about Xn using the plug-in method. now consider

4. Statistics

A confidence interval for a population mean has a margin of error of 3.1. a)Determine the length of the confidence interval. b)If the sample mean is 56.7, obtain the confidence interval.

1. Statistics

Find the critical value za/2 that corresponds to the given confidence level. 96% za/2=

2. Statistics

Find the critical value za/2 that corresponds to the given confidence level. 96%

3. Probability

Confidence interval interpretation Every day, I try to estimate an unknown parameter using a fresh data set. I look at the data and then I use some formulas to calculate a 70% confidence interval, [ฮหโ,ฮห+], based on the

4. math

When making a statistical inference about the mean of a normally distributed population based on a sample drawn from that population, which of the following statements is correct, all else being equal? The 68% confidence interval

1. Probability

A simple CI Let ฮธ be an unknown parameter, and let X be uniform on the interval [ฮธโ0.5,ฮธ+0.5]. Is [Xโ2,X+2] an 80% confidence interval? unanswered I form a confidence interval of the form [Xโa,X+a]. What is the narrowest

2. Statistics

Answer the question Yes or No. Sam computed a 90% confidence interval for from a specific random sample of size n. He claims that at the 90% confident level, his confidence interval does not contain . Is this claim correct? Answer

3. Statistics

Here are summary statistics for randomly selected weights of newbornโ girls: n=225โ, x=33.6hg, s=7.4 hg. Construct a confidence interval estimate of the mean. Use a โ99% confidence level. Are these results very different

4. Math

Suppose that f(x)=x^[1/3](x+3)^[2/3] (A) Find all critical values of f. If there are no critical values, enter None . If there are more than one, enter them separated by commas. Critical value(s) = (B) Use interval notation to