Confidence Intervals for the Mean; Large and Small

Confidence Intervals for the Mean;

Large and Small Samples

​Large Samples

​Small Samples

Multiple Choice

Will you use the t-distribution or z-distribution?

• t-distribution

• z-distribution

Fill in the Blank

For this question, what would be the critical value if you were creating a 90% confidence interval?

Fill in the Blank

What would be the point-estimate? (the sample mean)

Multiple Choice

What would be the margin of error?

• $$1.96\left(\frac{1.3}{\sqrt[]{20}}\right)$$  

• $$1.645\left(\frac{5.87}{\sqrt[]{20}}\right)$$  

• $$1.645\left(\frac{1.3}{\sqrt[]{20}}\right)$$  

• $$1.96\left(\frac{5.86}{\sqrt[]{20}}\right)$$  

Multiple Choice

What would the confidence interval be?

• $$14.62<\mu<15.58$$  

• $$14.63<\mu<15.57$$  

• $$14\ <\mu<15$$  

Multiple Choice

Will you use the t-distribution or z-distribution?

• t-distribution

• z-distribution

Fill in the Blank

For this question, what would be the critical value if you were creating a 95% confidence interval?

Fill in the Blank

What would be the point-estimate? (the sample mean)

Multiple Choice

What would be the margin of error?

• $$2.776\left(\frac{5.8}{\sqrt[]{5}}\right)$$  

• $$1.96\left(\frac{5.8}{\sqrt[]{4}}\right)$$  

• $$1.96\left(\frac{5.8}{\sqrt[]{5}}\right)$$  

• $$2.776\left(\frac{5.8}{\sqrt[]{4}}\right)$$  

Multiple Choice

What would the confidence interval be?

• $$14.99<\mu<29.40$$  

• $$15.02<\mu<29.42$$  

• $$14.99<\mu<29.41$$  

• $$15.00<\mu<29.40$$