Homework Answers
Option - D) The sampling distribution for n = 35 will have a smaller standard deviation.
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3) Suppose you know the population mean and are interested in seeing how a sample average...
Suppose an x distribution has mean μ = 3. Consider two corresponding x distributions, the first...
Suppose an x distribution has mean μ = 3. Consider two corresponding x distributions, the first based on samples of size n = 49 and the second based on samples of size n = 81. (a) What is the value of the mean of each of the two x distributions? For n = 49, μx = ? For n = 81, μx= ? (b) For which x distribution is P(x > 3.75) smaller? Explain your answer. a. The distribution with...
For the following situation, find the mean and standard deviation of the population. List all samples...
For the following situation, find the mean and standard deviation of the population. List all samples (with replacement) of the given size from that population and find the mean of each. Find the mean and standard distribution and compare them with the mean and standard deviation of the population. The scores of three students in a study group on a test are 97, 94, 95. Use a sample size of 3. The mean of the population is Round to two...
Suppose an x distribution has mean μ = 2. Consider two corresponding x distributions, the first...
Suppose an x distribution has mean μ = 2. Consider two corresponding x distributions, the first based on samples of size n = 49 and the second based on samples of size n = 81. (a) What is the value of the mean of each of the two x distributions? For n = 49, μ x = For n = 81, μ x = (b) For which x distribution is P( x > 2.5) smaller? Explain your answer. The distribution...
Suppose an x distribution has mean μ = 5. Consider two corresponding x distributions, the first based on samples of size...
Suppose an x distribution has mean μ = 5. Consider two corresponding x distributions, the first based on samples of size n = 49 and the second based on samples of size n = 81. (a) What is the value of the mean of each of the two x distributions? For n = 49, μ x = For n = 81, μ x = (b) For which x distribution is P( x > 6.25) smaller? Explain your answer. The distribution...
Use technology to create sampling distributions for a uniform population distribution. Complete parts a through d...
Use technology to create sampling distributions for a uniform population distribution. Complete parts a through d below. Population Distribution a. Use technology to create a sampling distribution for the sample mean using sample sizes n=2. Take N=5000 repeated samples of size 2, and observe the histogram of the sample means. What shape does this sampling distribution have? O A. The sampling distribution is triangular. OB. The sampling distribution is normal. OC. The sampling distribution is uniform. OD. The sampling distribution...
Help with question 10 please and thank you. Question 10 14 pts Suppose X is a...
Help with question 10 please and thank you.
Question 10 14 pts Suppose X is a random variable with mean 100 and standard deviation 15. Suppose that we select random samples of size n = 81 to construct a sampling distribution of means. Then which of the following is NOT true? O The standard deviation of the sampling distribution is 15/9 The mean of the sampling distribution is 100 Given enough samples, the shape of the sampling distribution will be...
1. Explain the relationship between sample size and standard error. 2. You have a normal population...
1. Explain the relationship between sample size and standard error. 2. You have a normal population with a u = 50 and o = 9. You obtain all possible random samples, each with n = 30, from this population and calculate each sample's mean. What will the average value of all the sample means be? a) 50 b) 5.56 c) 30.49 d) Cannot tell without more information 3. You are sampling from a distribution of scores that is positively skewed....
When estimating a population mean by a sample mean, the margin of error does NOT depend...
When estimating a population mean by a sample mean, the margin of error does NOT depend on ______. A) The confidence level B) The sample mean C) The sample size D) The population standard deviation What is the sampling distribution of a statistic? A) The distribution of observations of the statistic for all possible sizes of samples from a population B) The distribution of all possible observations of the statistic for samples of a given size from a population C)...
6. Sampling distributions, problem 3 Aa Aa Suppose that the population mean of firm size in...
6. Sampling distributions, problem 3 Aa Aa Suppose that the population mean of firm size in Urbana-Champaign is 25 employees and the standard deviation is 5. Your sample size is 1. The mean of the sampling distribution of the sample mean is and the standard deviation is while the mean of the standardized distribution is and the corresponding standard deviation is Now suppose the parameters of the population are the same, but your sample size is 100. The mean of...
Consider two sample means distributions corresponding to the same x distribution. The first sample mean distribution...
Consider two sample means distributions corresponding to the same x distribution. The first sample mean distribution is based on samples of size n=100 and the second is based on sample of size n=225.Which sample mean distribution has the smaller standard error? Explain. please provide two examples. thank you
For the following situation, find the mean and standard deviation of the population. List all samples (with replacement) of the given size from that population and find the mean of each. Find the mean and standard distribution and compare them with the mean and standard deviation of the population. The scores of three students in a study group on a test are 97, 94, 95. Use a sample size of 3. The mean of the population is Round to two...
Use technology to create sampling distributions for a uniform population distribution. Complete parts a through d below. Population Distribution a. Use technology to create a sampling distribution for the sample mean using sample sizes n=2. Take N=5000 repeated samples of size 2, and observe the histogram of the sample means. What shape does this sampling distribution have? O A. The sampling distribution is triangular. OB. The sampling distribution is normal. OC. The sampling distribution is uniform. OD. The sampling distribution...
Help with question 10 please and thank you.
Question 10 14 pts Suppose X is a random variable with mean 100 and standard deviation 15. Suppose that we select random samples of size n = 81 to construct a sampling distribution of means. Then which of the following is NOT true? O The standard deviation of the sampling distribution is 15/9 The mean of the sampling distribution is 100 Given enough samples, the shape of the sampling distribution will be...
1. Explain the relationship between sample size and standard error. 2. You have a normal population with a u = 50 and o = 9. You obtain all possible random samples, each with n = 30, from this population and calculate each sample's mean. What will the average value of all the sample means be? a) 50 b) 5.56 c) 30.49 d) Cannot tell without more information 3. You are sampling from a distribution of scores that is positively skewed....
6. Sampling distributions, problem 3 Aa Aa Suppose that the population mean of firm size in Urbana-Champaign is 25 employees and the standard deviation is 5. Your sample size is 1. The mean of the sampling distribution of the sample mean is and the standard deviation is while the mean of the standardized distribution is and the corresponding standard deviation is Now suppose the parameters of the population are the same, but your sample size is 100. The mean of...
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Amplitude=3;
fs=8000;
n=0:399;
t=0:1/fs: n*1/fs-1/fs;
signal=3+3*cos(2*pi*1100*t)+3*cos(2*pi*2200*t)+3*cos(2*pi*3300*t);
fftSignal= fft(signal);
fftSignal=f ftshift (fftSignal);
f=fs/2*linspace(-1,1,fs);
plot(f,abs(fftsignal);
xlabel('Frequency(Hz)’)
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