100% satisfaction guarantee Immediately available after payment Both online and in PDF No strings attached
logo-home
MATH 221 Week 5 Quiz: Statistics for Decision-Making {100% correct answers} $10.99   Add to cart

Exam (elaborations)

MATH 221 Week 5 Quiz: Statistics for Decision-Making {100% correct answers}

 7 views  0 purchase
  • Course
  • Institution

Question: (CO 4) From a random sample of 68 businesses, it is found that the mean time that employees spend on personal issues each week is 5.8 hours with a standard deviation of 0.35 hours. What is t he 95% confidence interval for the amount of time spent on personal issues? Question: (CO 4) If a ...

[Show more]

Preview 2 out of 14  pages

  • July 20, 2022
  • 14
  • 2021/2022
  • Exam (elaborations)
  • Questions & answers
avatar-seller
MATH 221 Week 5 Quiz
Question 1
(CO 4) From a random sample of 55 businesses, it is found that the mean time that employees spend on
personal issues each week is 5.8 hours with a standard deviation of 0.35 hours. What is the 95%
confidence interval for the amount of time spent on personal issues?

(5.74, 5.90)
(5.71, 5.89)
(5.73, 5.87)
(5.72, 5.88)

Question 1
(CO 4) From a random sample of 68 businesses, it is found that the mean time that employees spend on
personal issues each week is 5.8 hours with a standard deviation of 0.35 hours. What is the 95%
confidence interval for the amount of time spent on personal issues?
(5.74, 5.90)
(5.71, 5.89)
(5.73, 5.87)
(5.72, 5.88)


Question 2
(CO 4) If a confidence interval is given from 8.52 to 10.23 and the mean is known to be 9.375, what is
the margin of error?

0.428
1.710
8.520
0.855


Question 3
(CO 4) Which of the following is most likely to lead to a small margin of error?

large sample size
small mean
small standard deviation
large maximum error


Question 4
(CO 4) From a random sample of 85 teens, it is found that on average they spend 31.8 hours each week
online with a population standard deviation of 5.91 hours. What is the 90% confidence interval for the
amount of time they spend online each week?

(30.62, 32.99)
(19.98, 43.62)
(30.75, 32.85)
(25.89, 37.71)

, Question 5
(CO 4) A company making refrigerators strives for the internal temperature to have a mean of 37.5
degrees with a population standard deviation of 0.6 degrees, based on samples of 100. A sample of 100
refrigerators have an average temperature of 37.37 degrees. Are the refrigerators within the 90%
confidence interval?

Yes, the temperature is within the confidence interval of (37.40, 37.60)
No, the temperature is outside the confidence interval of (36.90, 38.10)
Yes, the temperature is within the confidence interval of (36.90, 38.10)
No, the temperature is outside the confidence interval of (37.40, 37.60)


Question 5
(CO 4) A company making refrigerators strives for the internal temperature to have a mean of 37.5
degrees with a population standard deviation of 0.6 degrees, based on samples of 100. A sample of 100
refrigerators have an average temperature of 37.70 degrees. Are the refrigerators within the 90%
confidence interval?

Yes, the temperature is within the confidence interval of (37.40, 37.60)
No, the temperature is outside the confidence interval of (37.40, 37.60)
Yes, the temperature is within the confidence interval of (36.90, 38.10)
No, the temperature is outside the confidence interval of (36.90, 38.10)

Question 6
(CO 4) What is the 97% confidence interval for a sample of 104 soda cans that have a mean amount of
12.05 ounces and a population standard deviation of 0.08 ounces?

(12.035, 12.065)
(11.998, 12.102)
(12.033, 12.067)
(11.970, 12.130)

Question 6
(CO 4) What is the 97% confidence interval for a sample of 204 soda cans that have a mean amount of
12.05 ounces and a population standard deviation of 0.08 ounces?

(11.970, 12.130)
(12.038, 12.062)
(12.033, 12.067)
(11.970, 12.130)

The benefits of buying summaries with Stuvia:

Guaranteed quality through customer reviews

Guaranteed quality through customer reviews

Stuvia customers have reviewed more than 700,000 summaries. This how you know that you are buying the best documents.

Quick and easy check-out

Quick and easy check-out

You can quickly pay through credit card or Stuvia-credit for the summaries. There is no membership needed.

Focus on what matters

Focus on what matters

Your fellow students write the study notes themselves, which is why the documents are always reliable and up-to-date. This ensures you quickly get to the core!

Frequently asked questions

What do I get when I buy this document?

You get a PDF, available immediately after your purchase. The purchased document is accessible anytime, anywhere and indefinitely through your profile.

Satisfaction guarantee: how does it work?

Our satisfaction guarantee ensures that you always find a study document that suits you well. You fill out a form, and our customer service team takes care of the rest.

Who am I buying these notes from?

Stuvia is a marketplace, so you are not buying this document from us, but from seller ProfGoodlucK. Stuvia facilitates payment to the seller.

Will I be stuck with a subscription?

No, you only buy these notes for $10.99. You're not tied to anything after your purchase.

Can Stuvia be trusted?

4.6 stars on Google & Trustpilot (+1000 reviews)

80202 documents were sold in the last 30 days

Founded in 2010, the go-to place to buy study notes for 14 years now

Start selling
$10.99
  • (0)
  Add to cart