To find a critical value for z-scores, go to the Probability Calculator in Geogebra. Make sure...

To find a critical value for z-scores, go to the Probability Calculator in Geogebra. Make sure you are using the standard Normal distribution (with μ=0,σ=1). Select a right-sided interval. Convert the confidence level to decimal, and enter (1−CL)/2 in the area/proportion box. This is what the text calls α/2. For example, a 95% confidence level would use (1−.95)/2. Don’t forget the parentheses! The critical value appear inside of P( ). Find the critical z-score value for each of the following confidence levels. Round each answer to four decimal places. The z-critical value for a(n) 70% confidence level is: 0.30 equation editorEquation Editor The z-critical value for a(n) 80% confidence level is: 1.281 equation editorEquation Editor The z-critical value for a(n) 90% confidence level is: equation editorEquation Editor The z-critical value for a(n) 95% confidence level is: equation editorEquation Editor The z-critical value for a(n) 99% confidence level is:

Expert Solution

orchestra answered 2 years ago

A) Find the z critical value for a 90% confidence level: Zc= B) Find the z...

A) Find the z critical value for a 90% confidence level: Zc= B) Find the z critical value for an 84% confidence level: Zc= C) The higher the confidence, the narrower the confidence interval True or False D) The greater the sample size, the mnarrower the confidence interval True or False E) In a recent study of 84 eighth graders, the mean number of hours per week that they watched TV was 22.3. Assume population standard deviation is 5.8 hours....

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Find the value of the probability of the standard normal random variable Z corresponding to this...

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