For Q10 Suppose you sample n=200 Douglas College students and you observe that x= 19 are left-handed. UsiP(1- )this data, you create a 99% confidence interval (p- E, ß+ E) where E= Za/2Calculate Za/2 (using Excel) and round the result to four decimal places (four digits after the decimal).1.6449QUESTION 10(.previous question continued) Using the sample data provided, determine the 99% confidence interval forthe proportion of left-handed students at Douglas College.o (0.0454,0.1546)o (0.0468,0.1432)o (0.0416,0.1484)o (0.0916,0.0984)

Name: For Q10 Suppose you sample n=200 Douglas College students and you obse
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Description: For Q10 Suppose you sample n=200 Douglas College students and you observe that x= 19 are left-handed. UsiP(1- )this data, you create a 99% confidence interval (p- E, ß+ E) where E= Za/2Calculate Za/2 (using Excel) and round the result to four decimal

Answered: Suppose you sample n=200 Douglas…

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For Q10

Suppose you sample n=200 Douglas College students and you observe that x= 19 are left-handed. Usi
P(1- )
this data, you create a 99% confidence interval (p- E, ß+ E) where E= Za/2
Calculate Za/2 (using Excel) and round the result to four decimal places (four digits after the decimal).
1.6449
QUESTION 10
(.previous question continued) Using the sample data provided, determine the 99% confidence interval for
the proportion of left-handed students at Douglas College.
o (0.0454,0.1546)
o (0.0468,0.1432)
o (0.0416,0.1484)
o (0.0916,0.0984)

Expert Solution

Step 1

I am sorry to say but your calculated Critical value ,Zα/2 is not correct.

Given information is as follows;

Total number of students at Douglas college , n = 200

Number of left handed students at Douglas college , x = 19

Confidence level , c = 99% ( 0.99)

Step 2 : Confidence Interval Formula :

The find confidence interval formula is as follows:

And here E is margin of error and to find this formula is as follows;

Here ,

Zα/2 is the critical value for the given confidence level.

n is the number of students.

p^ is the sample proportion value.

To find Confidence interval , very first step is to find Margin of error , E.

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