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QNT 275 Week 5 Quiz

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QNT 275 Week 5 Quiz 

https://uopcourses.com/category/qnt-275/

 

QNT 275 Week 5 Quiz

Chapter 08, Section 8.2, Problem 010

 

Correct.

 

Find  z for a  90% confidence level.

 

Round your answer to two decimal places.

 

z=

the tolerance is +/-2%

 

 

 

 

 

 

 

Chapter 08, Section 8.2, Problem 011

 

Your answer is partially correct.

 

For a data set obtained from a sample, n=80 and x¯=46.55. It is known that σ=3.9.

 

 

 

 

    1. What is the point estimate of μ?

 

 

 

 

The point estimate is   .

 

 

 

 

    1. Make a 97% confidence interval for μ.

 

 

 

 

Round your answers to two decimal places.

 

(  ,  )

 

 

 

 

    1. What is the margin of error of estimate for part b?

 

 

 

 

Round your answer to three decimal places.

 

E=

 

 

 

Chapter 08, Section 8.2, Problem 017a

 

Correct.

 

Determine the sample size for the estimate of μ for the following.

E=2.4, σ=12.35, confidence level=99%.

 

Round your answer to the nearest integer.

n=

the tolerance is +/-2%

 

 

 

 

 

Chapter 08, Section 8.3, Problem 034b

 

Correct.

 

For the following, find the area in the appropriate tail of the t distribution.

t=1.711 and n=25.

Round your answer to 3 decimal places.

 

Area in the

 

tail is

the tolerance is +/-2%

QNT 275 Week 5 Quiz https://uopcourses.com/category/qnt-275/ QNT 275 Week 5 Quiz Chapter 08, Section 8.2, Problem 010 Correct. Find z for a 90% confidence level. Round your answer to two decimal places. z= the tolerance is
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