(a) Count the number of ways to pick an unordered sample of 2 elements from a population...
(a) Count the number of ways to pick an unordered sample of 2 elements from a population of 9 elements.
answer:
(b) If random sampling is to be employed, the probability that any particular sample will be selected is
answer:
Homework Answers
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(a) Count the number of ways to pick an unordered
sample of 2 elements from a population...
Prove that the number of unordered sequences of length k with elements from a set X...
Prove that the number of unordered sequences of length k with elements from a set X of size n is n+k−1 k . Hint: For illustration, first consider the example n = 4, k = 6. Let the 4 elements of the set X be denoted a, b, c, d. Argue that any unordered sequence of size 6 consisting of elements a, b, c, d can be represented uniquely by a symbol similar to “··|·|··|·”, corresponding to the sequence aabccd....
Suppose a survey of 1000 students is obtained from a college whose population is 10,000 students....
Suppose a survey of 1000 students is obtained from a college whose population is 10,000 students. The sample was obtained by selecting at random from the population without replacement, meaning that no student could be selected twice. Although it is true that if the probability of selecting any one particular student is equal to the probability of selecting any other particular student then the sample is random, in this case, sampling was done without the probability of selecting the first...
According to a recent Current Population Reports, the population distribution of number of years of education...
According to a recent Current Population Reports, the population distribution of number of years of education for self-employed individuals in the United States has a mean of 13.9 and a standard deviation of 2.3. (a) Identify the variable. -number of years of education -number of educated individuals in the United States -number of self-employed individuals in the United States -number of self-employed individuals (b) Find the mean and standard deviation of the sampling distribution of for a random sample of...
Consider a finite population with five elements labeled A, B, C, D, and E. Ten possible...
Consider a finite population with five elements labeled A, B, C, D, and E. Ten possible simple random samples of size 2 can be selected. A. List the 10 samples beginning with AB, AC, and so on. B. Using simple random sampling, what is the probability that each sample of size 2 is selected? C. Assume random number 1 corresponds to A, random number 2 corresponds to B, and so on. List the simple random sample of size 2 that...
Consider a finite population with five elements labeled A, B. C, D, and E. Ten possible...
Consider a finite population with five elements labeled A, B. C, D, and E. Ten possible simple random sampies of size 2 can be Selected. a. List the 10 samples beginning with A, B, C, D, and E. Using simple random sampling, what is the probability that each sample of size 2 is selected? b. Assume the number 1 corresponds to A, the number 2 corresponds to B, and so on. Which of the following represents the simple random sample...
Consider a finite population with five elements labeled A, B, C, D, and E. Five possible...
Consider a finite population with five elements labeled A, B, C, D, and E. Five possible simple random samples of size 4 can be selected. a. Choose the correct list of the 5 samples. - Select your answer - b. Using simple random sampling, what is the probability that each sample of size 4 is selected? C. Suppose we use Excel's RAND function to assign random numbers to the five elements: A(0.2826) B(0.9735) C(0.527) D(0.3673) E(0.5364). List the simple random...
Will rate!! 1.) possible answers: -statistic -sample -parameter -number 2.) possible answers: -sampling -sampled -population...
Will rate!!
1.) possible answers:
-statistic
-sample
-parameter
-number
2.) possible answers:
-sampling
-sampled
-population
(1) is a random variable that is calculated from a sample. The probability distribution of the random variable is referred to as the (2) distribution. sampling sampled population
Question 3 A random sample of 600 M&Ms is selected from the population of plain M&Ms...
Question 3 A random sample of 600 M&Ms is selected from the population of plain M&Ms where the population proportion of yellow M&Ms is 20%. a) State the mean and standard error of the sampling distribution using the proper notation for the mean and standard error b) Can the sampling distribution be approximated by a normal distribution? Show work to support your answer c) Using the sampling distribution, calculate the probability that a sample of 600 M&Ms selected at random...
Suppose that a random sample of size 64 is to be selected from a population with...
Suppose that a random sample of size 64 is to be selected from a population with mean 40 and standard deviation 5. (Use a table or technology.) (a) What are the mean and standard deviation of the x sampling distribution? Describe the shape of the x sampling distribution. The shape of sampling distribution is-Select- (b) What is the approximate probability that will be within 0.5 of the population mean? (Round your answer to four decimal places.) (c) What is the...
A random sample of size 39 is to be selected from a population that has a...
A random sample of size 39 is to be selected from a population that has a mean μ = 53 and a standard deviation σ of 15. (a) This sample of 39 has a mean value of x, which belongs to a sampling distribution. Find the shape of this sampling distribution. -skewed right -approximately normal -skewed left -chi-square (b) Find the mean of this sampling distribution. (Give your answer correct to nearest whole number.) (c) Find the standard error of...
Suppose a survey of 1000 students is obtained from a college whose population is 10,000 students. The sample was obtained by selecting at random from the population without replacement, meaning that no student could be selected twice. Although it is true that if the probability of selecting any one particular student is equal to the probability of selecting any other particular student then the sample is random, in this case, sampling was done without the probability of selecting the first...
Consider a finite population with five elements labeled A, B. C, D, and E. Ten possible simple random sampies of size 2 can be Selected. a. List the 10 samples beginning with A, B, C, D, and E. Using simple random sampling, what is the probability that each sample of size 2 is selected? b. Assume the number 1 corresponds to A, the number 2 corresponds to B, and so on. Which of the following represents the simple random sample...
Consider a finite population with five elements labeled A, B, C, D, and E. Five possible simple random samples of size 4 can be selected. a. Choose the correct list of the 5 samples. - Select your answer - b. Using simple random sampling, what is the probability that each sample of size 4 is selected? C. Suppose we use Excel's RAND function to assign random numbers to the five elements: A(0.2826) B(0.9735) C(0.527) D(0.3673) E(0.5364). List the simple random...
Will rate!!
1.) possible answers:
-statistic
-sample
-parameter
-number
2.) possible answers:
-sampling
-sampled
-population
(1) is a random variable that is calculated from a sample. The probability distribution of the random variable is referred to as the (2) distribution. sampling sampled population
Suppose that a random sample of size 64 is to be selected from a population with mean 40 and standard deviation 5. (Use a table or technology.) (a) What are the mean and standard deviation of the x sampling distribution? Describe the shape of the x sampling distribution. The shape of sampling distribution is-Select- (b) What is the approximate probability that will be within 0.5 of the population mean? (Round your answer to four decimal places.) (c) What is the...
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