Solution :
Degrees of freedom = df = n - 1 = 20
At 90% confidence level the t is ,
t
/2,df = t0.05,20 = 1.725
Margin of error = E = t/2,df
* (s /
n)
= 1.725 * (414.04 /
21)
= 155.855
The 90% confidence interval estimate of the population mean is,
- E <
1343.04 - 155.855 <
1187.185 <
The lower value of this confidence interval is 1187.185.
Question 26 3 pts Small Mean Problem. Grandfather clocks have a particular market in auctions. You...
Small Mean Problem. Grandfather clocks have a particular
market in auctions. You are given a random sample of 21 purchases
of grandfather clocks at auctions in Pennsylvania. The sample
statistics are:
Mean = $1,343.04
Std Dev = $414.04
C.V. = 30.83
N = 21
You are asked to create a 90% Confidence Interval around the
price for this sample.
The Lower Value for this confidence interval is? I just want
the answer. Use 3 decimal places for your answer and...
Question 27 3 pts Small Mean Problem. Grandfather clocks have a particular market in auctions. You are given a random sample of 21 purchases of grandfather clocks at auctions in Pennsylvania. The sample statistics are: • Mean = $1,343.04 • Std Dev = $414.04 • C.V. = 30.83 • N = 21 You are asked to create a 90% Confidence Interval around the price for this sample. The t-value you would use is? I just want the answer. Use 3...
Small Mean Problem. Grandfather clocks have a particular market in auctions. You are given a random sample of 21 purchases of grandfather clocks at auctions in Pennsylvania. The sample statistics are: • Mean = $1,343.04 • Std Dev = $414.04 • C.V. = 30.83 • N= 21 You are asked to create a 90% Confidence Interval around the price for this sample. Some asks what would happen if you calculated a 95% Confidence Interval? You answer the BOE would be...
Question 11 3 pts For this problem it would be helpful to have a standard normal table. What is the z-value needed for the critical value for a one-tailed lower hypothesis test of a proportion with a sample size of 450 and alpha equal to .01? -1.96 2.33 -2.33 -2.576 Question 26 3 pts Small Mean Problem. Grandfather clocks have a particular market in auctions. You are given a random sample of 21 purchases of grandfather clocks at auctions in...
Question 28 3 pts Small Mean Problem. Grandfather clocks have a particular market in auctions. One theory about the price at an auction is that it is higher when there are 10 or more bidders. From published data, the average price of all grandfather clocks is given as $1,327. You are not given a standard deviation for all clocks. You are given a random sample of 14 purchases of grandfather clocks at auctions in Pennsylvania where there are 10 or...
Question 28 3 pts Small Mean Problem. Grandfather clocks have a particular market in auctions. One theory about the price at an auction is that it is higher when there are 10 or more bidders. From published data, the average price of all grandfather clocks is given as $1,327. You are not given a standard deviation for all clocks. You are given a random sample of 14 purchases of grandfather clocks at auctions in Pennsylvania where there are 10 or...
Question 29 3 pts Small Mean Problem. Grandfather clocks have a particular market in auctions. One theory about the price at an auction is that it is higher when there are 10 or more bidders. From published data, the average price of all grandfather clocks is given as $1,327. You are not given a standard deviation for all clocks. You are given a random sample of 14 purchases of grandfather clocks at auctions in Pennsylvania where there are 10 or...
Small Mean Problem. Grandfather clocks have a particular market in auctions. One theory about the price at an auction is that it is higher when there are 10 or more bidders. From published data, the average price of all grandfather clocks is given as $1,327. You are not given a standard deviation for all clocks. You are given a random sample of 14 purchases of grandfather clocks at auctions in Pennsylvania where there are 10 or more bidders. Assume your...
Question 13 3 pts Question 28 3 pts Small Sample Mean Problem. A study was done to determine the effect of vitamin supplements for the mother on the birth weight of babies. The sample size was 17. All the women in the study regularly Small Mean Problem. Grandfather clocks have a particular market in Question 27 3 pts visited a doctor during their pregnancy. The data below show the auctions. One theory about the price at an auction is that...
small mean problem. grandfather c
Question 28 Small Mean Problem. Grandfather clocks have a particular market in auctions. One theory about price at an auction is that it is higher when there are 10 or more bidders. From published data, the average price of all grandfather clocks is given as $1,327. You are not given a standard deviation fo clocks. You are given a random sample of 14 purchases of grandfather clocks at auctions in Pennsyl where there are 10...