Question

For children in the low income group, find a 90% confidence interval for the proportion of children that drew the nickel too large.

Give all answers correct to 3 decimal places.

a) Critical value (positive value only):

b) Margin of error:     

c) Confidence interval:  < pp <  

d) Does the confidence interval support the claim that more than 40% of children from the low income group draw nickels too large?

• Confidence interval supports claim
• Confidence interval does not support claim

For the high income group, find a 98% confidence interval for the mean nickel diameter.

e) Critical value (positive value only):

f) Margin of error:     

g) Confidence interval:  < μμ <  

h) Does the confidence interval support the claim that average nickel size drawn by children from the high income is less than 22 mm?

• Confidence interval supports claim
• Confidence interval does not support claim

Answer 1