![cheyenneisaboss22](/avatars/4467.jpg)
cheyenneisaboss22
03.12.2019 •
Mathematics
Arandom sample of 49 text books purchased at a local bookstore showed an average price of $122 with a population standard deviation of $15. let u (new) be the true mean cost of a text book sold by this store. construct a confidence interval with a 90% degree of confidence. clearly label the following:
a. point estimate
b. critical value,
c. margin of error
d. confidence interval
e. interpretation (confidence statement).
Solved
Show answers
More tips
- W Work and Career Where can you learn to be a flight attendant?...
- C Cities and Countries What time does the Metro open in Moscow?...
- S Style and Beauty How to Get Rid of Under Eye Bruises?...
- F Food and Cooking How to Calculate the Gender of Your Child with Blood?...
- C Computers and Internet IMHO: What is it, why is it important, and how to use it?...
- H Health and Medicine Effective Ways to Treat Colic in Infants...
- H Health and Medicine How to Treat the Flu: A Comprehensive Guide...
- S Style and Beauty 5 Tips for Choosing the Best Ugg Boots...
- C Computers and Internet How to Create a Folder on Your iPhone?...
- C Computers and Internet iPhone SMS Delivery Report: How to Set It Up...
Answers on questions: Mathematics
- M Mathematics PLEASE HELP! You are camping and have only a 3 cup container and a 5 cup container. You need to measure 1 cup of water into a pot. How can you do this? Is there more than...
- M Mathematics Find the derivative of the inverse to f(x)=x+3sin x at x=6...
- H History What is compensatory justice?...
- E English Ashort summary of a venture. a. allegory b. anecdote c. alliteration d. archetype...
- M Mathematics Find the 15th term of the arithmetic sequence 13,8,3,-2...
Ответ:
Step-by-step explanation:
Confidence Interval can be calculated using P±ME where
P is the point estimate for the mean cost of a text book ( $122 )ME is the margin of error from the meanAnd margin of error (ME) can be calculated using the formula
ME=
where
z is the critical value for the 90% confidence level (1.645)s is the population standard deviation ($15) N is the sample size (49)Margin of error, ME=
= 3.525
Then 90% confidence interval is $122±3.525
To interpret this, there is 90% probability that true population average price of text books is in the range $122±$3.525
Ответ:
Step-by-step explanation:
so use a scale factor
a to b : 96 to 150
difference 150-96=54 now just find what you need to scale which would be 3/2 or 1.5
same logic for the rest! best of luck