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# To give a 98% confidence interval for a population mean , you would use the critical value?

To give a 98% confidence interval for a population mean μ, you would use the critical value? Please explain how to find this z-score and how to find the margin of error as well. Im really struggling with confidence intervals.

The critical value is ﻿ Z ​ 0 . 0 1 ​ ​ ﻿ =2.3263 margin of error= ﻿ Z ∗ s t a... View the full answer

• Kindly note that Z is the critical value
• Amkasyoka
• May 14, 2018 at 9:22pm
• how did you get 2.3263? did you use software. I don't understand that part
• sdossa
• May 14, 2018 at 9:47pm
• The value 2.3263 can be obtained from the z-table by reading the value of Z corresponding to a 1% level of significance. Alternatively the excel function NORMSINV(0.01) can be used
• Amkasyoka
• May 14, 2018 at 9:56pm

z score=(Sample mean-Population Mean)/Standard deviation critical... View the full answer

Confidence Interval when population standard deviation is given: ﻿ μ... View the full answer

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