I only need #'s 8 and 22, note 22 is not A and 8 is not 606
Question 8
Population proportion = p = 0.09
stanard error of proportion = sqrt [p * (1-p)/n] = sqrt [0.09 * 0.91/n]
Margin of error = 3% = 0.03
Critical test statistic for 99% confidence interval = 2.586
so here
0.03 = 2.586 * sqrt [0.09 * 0.91/n]
n = (2.586/0.03)2 * 0.09 * 0.91
n = 603.7756
or n = 604
Question 22
Sample size = n = 10
Here degree of freedom = 10 - 1 = 9
Here it is asked that which of the following is not a 95%
confidence interval of population mean .
Here option a is a 95% confidence interval. Option b, Option C, Option D are also 95% confidence interval but not a symmetric one.
But here the answer is option e as this is not a 95% confidence interval as 0.045 + 0.01 = 0.055 not equals to 0.05.
Here the question is tricky as it asked not a 95% confidence interval.
8. A random sample of size 100 from a population has a mean I = 3.87 and standard deviation s = 1.25. Construct a 95% confidence interval for the population mean u.
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1. construct a 95% confidence interval where standard deviation is 15 and mean is 99.133 2. construct a 95% confidence interval where standard deviation is 15 and mean is 99 3. construct a 95% confidence interval where standard deviation is 15 and mean is 98.625 i want to add that the population mean is 100 question 1- sample size is 8 question 2- sample size is 20 question 3- sample size is 30
7. (10pts) In a study of student loan subsidies, I surveyed 20 students. In this sample, students will owe a mean of $25,000 at the time of graduation with a standard deviation of $1000. (a) (5pts) Develop a 95% confidence interval for the population me mean. (b) (5pts) Develop a 95% confidence interval for the population standard deviation
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Rawan Badran
2. For the following data: 2 3 4 5 6 12 10 9 8 5 13 a. Calculate the sample mean and sample variance b. Calculate the probability that the population mean is between 9 and 10 if the population standard deviation is known to be 3. c. What is the 90% confidence interval for the population mean if the population standard deviation is...
QUESTION 8 Use the confidence level and sample data to find a confidence interval for estimating the population u. Round your answer to the same numbe of decimal places as the sample mean. A random sample of 1 17 full grown lobsters had a mean weight of 22 ounces and a standard deviation of 2.7 ounces. Construct a 98% confidence interval for the population mean . ?20 oz < ? < 22 oz 022 oz < ? < 24 oz...
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Solve quickly I get you thumbs up directly
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Abdul-Rahim Taysir
2. For the following data: 2 3 4 5 6 12 10 9 8 5 13 a. Calculate the sample mean and sample variance b. Calculate the probability that the population mean is between 9 and 10 if the population standard deviation is known to be 3. c. What is the 90% confidence interval for the population mean if the population standard deviation is...
8.1.5 Question Help Determine the 95% confidence interval estimate for the population mean of a normal distribution given n = 100, o = 133, and x = 1,500 The 95% confidence interval for the population mean is from to (Round to two decimal places as needed. Use ascending order.) 8.1.14-T Question Help As a follow-up to a report on gas consumption, a consumer group conducted a study of SUV owners to estimate the mean mileage for their vehicles. A simple...
+ 0.84/4.16 points Previous Answers ASWSBE14 8.E.003. My Notes + Ask Your Teacher You may need to use the appropriate appendix table or technology to answer this question. A simple random sample of 90 items resulted in a sample mean of 60. The population standard deviation is o = 10. (a) Compute the 95% confidence interval for the population mean. (Round your answers to two decimal places.) to (b) Assume that the same sample mean was obtained from a sample...
I just need to confirm that I must first solve for
n(sample size); then whether or not I use normal distribution (that
is I'm assuming it's greater than 30); and the accompanying excel
function as norm.s.inv??? Also any other additional assistance you
deem pertinent...
Help BAN122_HW2_Butler_Darren Tell me what you want to do Developer Excel File Edit View Insert Format Tools Data Window AutoSave OFF HEVODO Home Insert Draw Page Layout Formulas Data Review View Calibri (Body) 11 AA =...