true or false. if a 95% confidence interval for a population mean is 1.7<u<2.3, then the...
true or false. if a 95% confidence interval for a population mean is 1.7<u<2.3, then the probability is 0.95 that the mean is between 1.7 and 2.3.
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true or false. if a 95% confidence interval for a
population mean is 1.7<u<2.3, then the...
You construct a 95% confidence interval for a population mean using a random sample. The confidence...
You construct a 95% confidence interval for a population mean using a random sample. The confidence interval is 24.9 less thanmuless than31.5. Is the probability that mu is in this interval 0.95? Explain.
In a 95% confidence interval. i 1-0.0s is called the confidence coefficient. A) True lB) False...
In a 95% confidence interval. i 1-0.0s is called the confidence coefficient. A) True lB) False If a 95% confidence interval on the mean has a lower limit of 10 and an upper limit that 95% of the time the true value of the mean is between 10 and 15. ) True B) False For a fixed value of the standard deviation and a fixed sample size, a confidence inte population mean will get longer as the level of confidence...
A fitness center is interested in finding a 95% confidence interval for the mean number of...
A fitness center is interested in finding a 95% confidence interval for the mean number of days per week that Americans who are members of a fitness club go to their fitness center. Records of 240 members were looked at and their mean number of visits per week was 2.3 and the standard deviation was 1.7. Round answers to 3 decimal places where possible. a. To compute the confidence interval use a ? v distribution. b. With 95% confidence the...
Suppose you construct a 95% confidence interval estimate of the true population mean by conducting a...
Suppose you construct a 95% confidence interval estimate of the true population mean by conducting a random sample of size n=100. Your sample mean x (with a bar over it) = 80.5 and your calculated maximum error of the estimate is E = 3.5. What does this suggest? Circle answer. a. in 5% of all samples of this size, the mean is more than 84, b. in 95% of all samples of this size, the mean is at least 77,...
19. The 99% confidence interval is _________ than 95% confidence interval in a same problem. a....
19. The 99% confidence interval is _________ than 95% confidence interval in a same problem. a. smaller b. larger 20. Suppose 95% confidence interval of the population mean is (4.5, 9.7). (20.a) The population mean must be in the range (4.5, 9.7). a. True b. False (20.b) What is the chance of error if you say that the population mean is somewhere in the range (4.5, 9.7) a. 0.95 b. 0.05 c. 0 d. 0.5 (20.c) How sure is it...
Q12. a) Suppose the given confidence interval estimates the true population mean as 3.5 < u...
Q12. a) Suppose the given confidence interval estimates the true population mean as 3.5 < u < 13.1 with a 95% level of confidence when o is known. (1) Find the point estimates for the unknown population mean. (ii) Find the margin of error. (iii) Give the interpretation of the confidence interval. (iv) Name two ways of decreasing the width of the confidence interval. b) State the assumptions necessary for linear regression model Y = A + Bx + E...
Let's say we have constructed a 95% confidence interval estimate for a population mean. Which of...
Let's say we have constructed a 95% confidence interval estimate for a population mean. Which of the following statements would be correct? A. We expect that 95% of the intervals so constructed would contain the true population mean. B. We are 95% sure that the true population mean lies either within the constructed interval or outside the constructed interval. C. Taking 100 samples of the same size, and constructing a new confidence interval from each sample, would yield five intervals...
Interpret the meaning of "The 95% confidence interval for true mean forced vital capacity (FVC) is...
Interpret the meaning of "The 95% confidence interval for true mean forced vital capacity (FVC) is 4.56 +/or- 0.35." Choose one. a. The true population mean forced vital capacity (FVC) is between 4.21 and 4.91 b. We are 95% confident that the true population mean forced vital capacity (FVC) is between 4.21 and 4.91. in the long run, a confidence interval constructed this way will capture the true value of mean 95% of the time c. In the long run,...
2. A 95% confidence interval for H1 – Hl2 is given by (-2.3, 4.5). What can...
2. A 95% confidence interval for H1 – Hl2 is given by (-2.3, 4.5). What can we infer from this confidence interval? (a) This confidence interval implies that there is not a significant difference between the mean for population 1 and the mean for population 2. (b) This confidence interval implies that the mean for population 1 is greater than the mean for population 2. (C) This confidence interval implies that the mean for population 1 is less than the...
A 95% confidence interval obtained from a sample of 100 outpatients for the true population mean...
A 95% confidence interval obtained from a sample of 100 outpatients for the true population mean normal mean systolic blood pressure is given by (114 mmHG, 120 mmHG). A) Find 99% Confidence Interval B) Can you tell how much would it be wider compare to 95% Confidence Interval? Mention all the steps for the both answers.
In a 95% confidence interval. i 1-0.0s is called the confidence coefficient. A) True lB) False If a 95% confidence interval on the mean has a lower limit of 10 and an upper limit that 95% of the time the true value of the mean is between 10 and 15. ) True B) False For a fixed value of the standard deviation and a fixed sample size, a confidence inte population mean will get longer as the level of confidence...
A fitness center is interested in finding a 95% confidence interval for the mean number of days per week that Americans who are members of a fitness club go to their fitness center. Records of 240 members were looked at and their mean number of visits per week was 2.3 and the standard deviation was 1.7. Round answers to 3 decimal places where possible. a. To compute the confidence interval use a ? v distribution. b. With 95% confidence the...
Q12. a) Suppose the given confidence interval estimates the true population mean as 3.5 < u < 13.1 with a 95% level of confidence when o is known. (1) Find the point estimates for the unknown population mean. (ii) Find the margin of error. (iii) Give the interpretation of the confidence interval. (iv) Name two ways of decreasing the width of the confidence interval. b) State the assumptions necessary for linear regression model Y = A + Bx + E...
2. A 95% confidence interval for H1 – Hl2 is given by (-2.3, 4.5). What can we infer from this confidence interval? (a) This confidence interval implies that there is not a significant difference between the mean for population 1 and the mean for population 2. (b) This confidence interval implies that the mean for population 1 is greater than the mean for population 2. (C) This confidence interval implies that the mean for population 1 is less than the...
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fftSignal= fft(signal);
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f=fs/2*linspace(-1,1,fs);
plot(f,abs(fftsignal);
xlabel('Frequency(Hz)’)
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