Logo
Home Study Material Contact Search
AI Chat FREE
  1. mathematics
  2. statistics
  3. in a random sample of 8 ​people, the mean c

In a random sample of 8 ​people, the mean commute time to work was 35.5 minutes and the standard...

60.1K

Verified Solution

Question

Statistics

In a random sample of

8

​people, the mean commute time to work was

35.5

minutes and the standard deviation was

7.3

minutes. A

98%

confidence interval using the​ t-distribution was calculated tobe

left parenthesis 27.8 comma 43.2 rightparenthesis(27.8,43.2).

After researching commute times to​ work, it was found that thepopulation standard deviation is

8.7

minutes. Find the margin of error and construct a

98%

confidence interval using the standard normal distribution withthe appropriate calculations for a standard deviation that isknown. Compare the results.

Answer & Explanation Solved by verified expert
3.8 Ratings (482 Votes)
Solution Given thatPoint estimate sample mean 355Population standard    See Answer
Get Answers to Unlimited Questions

Join us to gain access to millions of questions and expert answers. Enjoy exclusive benefits tailored just for you!

Membership Benefits:
  • Unlimited Question Access with detailed Answers
  • Zin AI - 3 Million Words
  • 10 Dall-E 3 Images
  • 20 Plot Generations
  • Conversation with Dialogue Memory
  • No Ads, Ever!
  • Access to Our Best AI Platform: Flex AI - Your personal assistant for all your inquiries!
Become a Member

Other questions asked by students

Civil Engineering
1.2K views

Suppose you have an electrostatic precipitator currently operating at 90% for 3 µm diameter particles and...

Finance
1.2K views

Loss control activities of a business focus on finding and implementing solutions to reduce the probability of...

Finance
1.2K views

Consider the three stocks in the following table. Pt represents price at time t, and Qt represents...

Basic Math
1.2K views

An article suggested that yield strength (ksi) for A36 grade steel is normally distributed with ?...

Accounting
1.2K views

Problem 1 Hood lease equipment from Ford on January 1, 2019. Ford purchased the equipment from a...

Biology
1.2K views

The light independent reactions of photosynthesis are those that O convert glucose into energy convert...

Physics
1.2K views

Four bodies A B C and D are projected from the ground with same speed...

Basic Math
1.2K views

Consider the data from the table showing the heights of 15 people at a family...

Basic Math
1.2K views

The lengths of the sides of a right triangle are such that the shortest side...

Calculus
1.2K views

in 4 0 n 2 anthmetic O geometric Find the common difference or ratio 1...

Accounting
1.2K views

URGENT Alicia has been working for JMM Corp. for 33 years. Alicia participates in...

Finance
1.2K views

The Sharpe ratio of the market portfolio is equal to 2 and its profitability is...