Homework Answers
7. Given,
s = 7
E = 2
For 99% confidence, z = 2.576
Therefore,
Required sample size
n = 81.3
n = 82 [Rounded off to next whole number]
Add Answer to:
6) A random sample of 10 parking meters in a resort community showed the following incomes...
6) A random sample of 10 parking meters in a resort community showed the following incomes...
6) A random sample of 10 parking meters in a resort community showed the following incomes for a day. Assume the incomes are normally distributed. Find the 95% confidence interval for the true mean. Show set up. Answer is all decimal places displayed on calculator. $3.60 $4.50 $2.80 $6.30 $2.60 $5.20 $6.75 $4.25 $8.00 $3.00 7) A doctor at a local hospital is interested in estimating the birth weight of infants. How large a sample must she select if she...
6) A random sample of 10 parking meters in a resort community showed the following incomes...
6) A random sample of 10 parking meters in a resort community showed the following incomes for a day. Assume the incomes are normally distributed. Find the 95% confidence interval for the true mean. Show set up. Answer is all decimal places displayed on calculator $3.60 $4.50 $2.80 $6.30 $2.60 $5.20 $6.75 $4.25 $8,00 $3.00
7) A doctor at a local hospital is interested in estimating the birth weight of infants....
7) A doctor at a local hospital is interested in estimating the birth weight of infants. How large a sample must she select if she desires to be 99% confident that her estimate is within 2 ounces of the true mean? Assume that s = 7 ounces based on earlier studies.
Beview 1JA survey of 700 non-fatal accidents showed that 183 involved faulty equipment. Find a point...
Beview 1JA survey of 700 non-fatal accidents showed that 183 involved faulty equipment. Find a point estimate for p, the population proportion of accidents that involved faulty equipment. 2) An article a Florida newspaper reported on the topics that teenagers most want to discuss with their pare nts. The findings, the results of a poll, showed that 46% would like more discussion about the family's financial situation, 37% would like to talk about school, and 30% would like to talk...
A health care professional wishes to estimate the birth weights of infants. How large a sample...
A health care professional wishes to estimate the birth weights of infants. How large a sample must be obtained if he desires to be 97% confident that the true mean is within 3 ounces of the sample mean and assume we know the population variance from past studies is 81 ounces?
4. Definition of Confidence Intervals (Section 6.1) Circle your answer, True of False. • A 99%...
4. Definition of Confidence Intervals (Section 6.1) Circle your answer, True of False. • A 99% confidence interval means that there is a 99% probability that the population mean, M, is in the interval. True / False • A 90% confidence interval means that if a large number of samples are taken, 90% of these samples would contain the actual mean, M. True / False 5. A nurse at a local hospital is interested in estimating the birth weight of...
Oubled to 10.4 and the level of confidence 0J 0011at would be the new margin of...
Oubled to 10.4 and the level of confidence 0J 0011at would be the new margin of error and confidence interval? Margin of error, E o 0.90-1.645 11645X10.4/T0.7 Did the confidence interval increase or decrease and why? Confidence Interval: 2089< u< 2H.32 24.10 4. Definition of Confidence Intervals (Section 6.1) Circle your answer, True of False. A 99% confidence interval means that there is a 99% probability that the population mean, u, is in the interval. True / False A 90%...
second bullet point of 11 and 12 mead 13. The number of wins in a season...
second bullet point of 11 and 12
mead 13. The number of wins in a season for 16 randomly selected professional football teams are listed below. (Section 6.2) Note: Use the SPSS below. Number of Wins in a Season for Professional Football Teams 9 9 9 10 9 7 12 9 9 7 10 7 7 stes 1.153.1.100 -0.731 Wins One-Sample Statistics N Mean Std Deviation Std. Error Mean 16 8.38 1.668 Jice 417 8.38 + 0.73= One-Sample Test Test...
problems 4, 5, 6, 11 and 13 If the population standard deviation was doubled to 10.4...
problems 4, 5, 6, 11 and 13
If the population standard deviation was doubled to 10.4 and the level of confidence remained at 90%, what would be the new margin of error and confidence interval Margin of error, E. Confidence interval: 20.11<x<34.31 O Did the confidence interval increase or decrease and why? increase 4. Definition of Confidence Intervals (Section 6.1) Circle your answer, True of False. • A 99% confidence interval means that there is a 99% probability that the...
STA2221 examples on CI & Testing of Hypothesis Name MULTIPLE CHOICE. Choose the one alternative that...
STA2221 examples on CI & Testing of Hypothesis Name MULTIPLE CHOICE. Choose the one alternative that best completes the statement or answer the question Provide an appropriate response. 1) Find the critical value,te for 0.99 and n-10. A) 3.250 B) 3.169 1.833 D) 2.262 2) Find the critical value to forc=0.95 and n=16. A) 2.947 B) 2.602 2120 D) 2.131 3) Find the value of E, the margin of error, for A) 1.69 B) 0.42 0.99, n=16 and s=2.6. C)...
6) A random sample of 10 parking meters in a resort community showed the following incomes for a day. Assume the incomes are normally distributed. Find the 95% confidence interval for the true mean. Show set up. Answer is all decimal places displayed on calculator. $3.60 $4.50 $2.80 $6.30 $2.60 $5.20 $6.75 $4.25 $8.00 $3.00 7) A doctor at a local hospital is interested in estimating the birth weight of infants. How large a sample must she select if she...
6) A random sample of 10 parking meters in a resort community showed the following incomes for a day. Assume the incomes are normally distributed. Find the 95% confidence interval for the true mean. Show set up. Answer is all decimal places displayed on calculator $3.60 $4.50 $2.80 $6.30 $2.60 $5.20 $6.75 $4.25 $8,00 $3.00
7) A doctor at a local hospital is interested in estimating the birth weight of infants. How large a sample must she select if she desires to be 99% confident that her estimate is within 2 ounces of the true mean? Assume that s = 7 ounces based on earlier studies.
Beview 1JA survey of 700 non-fatal accidents showed that 183 involved faulty equipment. Find a point estimate for p, the population proportion of accidents that involved faulty equipment. 2) An article a Florida newspaper reported on the topics that teenagers most want to discuss with their pare nts. The findings, the results of a poll, showed that 46% would like more discussion about the family's financial situation, 37% would like to talk about school, and 30% would like to talk...
4. Definition of Confidence Intervals (Section 6.1) Circle your answer, True of False. • A 99% confidence interval means that there is a 99% probability that the population mean, M, is in the interval. True / False • A 90% confidence interval means that if a large number of samples are taken, 90% of these samples would contain the actual mean, M. True / False 5. A nurse at a local hospital is interested in estimating the birth weight of...
Oubled to 10.4 and the level of confidence 0J 0011at would be the new margin of error and confidence interval? Margin of error, E o 0.90-1.645 11645X10.4/T0.7 Did the confidence interval increase or decrease and why? Confidence Interval: 2089< u< 2H.32 24.10 4. Definition of Confidence Intervals (Section 6.1) Circle your answer, True of False. A 99% confidence interval means that there is a 99% probability that the population mean, u, is in the interval. True / False A 90%...
second bullet point of 11 and 12
mead 13. The number of wins in a season for 16 randomly selected professional football teams are listed below. (Section 6.2) Note: Use the SPSS below. Number of Wins in a Season for Professional Football Teams 9 9 9 10 9 7 12 9 9 7 10 7 7 stes 1.153.1.100 -0.731 Wins One-Sample Statistics N Mean Std Deviation Std. Error Mean 16 8.38 1.668 Jice 417 8.38 + 0.73= One-Sample Test Test...
problems 4, 5, 6, 11 and 13
If the population standard deviation was doubled to 10.4 and the level of confidence remained at 90%, what would be the new margin of error and confidence interval Margin of error, E. Confidence interval: 20.11<x<34.31 O Did the confidence interval increase or decrease and why? increase 4. Definition of Confidence Intervals (Section 6.1) Circle your answer, True of False. • A 99% confidence interval means that there is a 99% probability that the...
STA2221 examples on CI & Testing of Hypothesis Name MULTIPLE CHOICE. Choose the one alternative that best completes the statement or answer the question Provide an appropriate response. 1) Find the critical value,te for 0.99 and n-10. A) 3.250 B) 3.169 1.833 D) 2.262 2) Find the critical value to forc=0.95 and n=16. A) 2.947 B) 2.602 2120 D) 2.131 3) Find the value of E, the margin of error, for A) 1.69 B) 0.42 0.99, n=16 and s=2.6. C)...
Most questions answered within 3 hours.
-
For Dijkstra’s shortest path algorithm:
a. Give the Big-O time for Dijkstra’s shortest path algorithm
and...
asked 7 minutes ago -
Phosphorus violates the 'octet rule' in biological molecules,
forming more covalent bonds than expected based on...
asked 10 minutes ago -
A 1.3 eV electron has a 10-4 probability of tunneling
through a 2.4 eV potential barrier....
asked 28 minutes ago -
What is the one ingredient that is common to being successful
with all stakeholders?
profit
trust...
asked 27 minutes ago -
Write an assembly language 32 bit program that reads in lines of
text by a .txt...
asked 30 minutes ago -
what is the density ( in g/L) of hydrogen gas at 29 degrees C and a...
asked 38 minutes ago -
5-6. You are considering three investment alternatives for some
spare cash: Old Reliable Corporation stock (A1),...
asked 30 minutes ago -
Problem 16-02
Receivables Investment
Medwig Corporation has a DSO of 45 days. The company averages
$7,250...
asked 45 minutes ago -
Mr. Brown hired Lowe's Maintenance Services Limited to repair
and paint the exterior wall of his...
asked 46 minutes ago -
When might an index slow down the overall performance of the
database? Choose the best answer....
asked 51 minutes ago -
Due to a recession, expected inflation this year is only 2.25%.
However, the inflation rate in...
asked 52 minutes ago -
Write four functions: (IN PYTHON 3)
1) bound(l) - given a list of integers l, compute...
asked 54 minutes ago