Homework Answers
1. In order to conduct inference on a population mean, the data used must be the result of a
d) simple random sample
Since the first condition to used any statistical test that is hypothesis test the samples must be a random sample.
If the sample are not random then then the sample statistics may not be an unbiased estimator for population parameters.
Add Answer to:
DES U JIUZU YENU 1. In order to conduct inference on a population mean, the data...
In order to gather the opinion of students regarding online assignments, data will be collected from...
In order to gather the opinion of students regarding online assignments, data will be collected from STAT 1000 students who are currently registered in the course. The researcher decides to divide the students into two groups, 1) students who have never taken this course before and 2) students who have taken this course before. Ten students will be randomly selected from each of the two groups. The sample thus selected is a Select one: a. Convenience sample b. Voluntary response...
Solve 7,10,11,12 in business stat 2430 Name: The mayors office wants to know how people in...
Solve 7,10,11,12 in business stat 2430
Name: The mayors office wants to know how people in the city feel about the condition of the city's roads. They place an announcement in the newspaper asking residents to email their opinions to the mayor's office. Five hundred people send e als and about 84% of the responses indicate displeasure with the condition of the city's roads A) This is a simple random sample. It gives very accurate results B) This is a...
A simple random sample of size n = 41 is obtained from a population with u...
A simple random sample of size n = 41 is obtained from a population with u = 67 and o = 17. (a) What must be true regarding the distribution of the population in order to use the normal model to compute probabilities involving the sample mean? Assuming that this condition is true, describe the sampling distribution of x. (b) Assuming the normal model can be used, determine P«<71.4). (c) Assuming the normal model can be used, determine Plă 269.3).
A simple random sample of size n = 46 is obtained from a population with u...
A simple random sample of size n = 46 is obtained from a population with u = 63 and o = 16. (a) What must be true regarding the distribution of the population in order to use the normal model to compute probabilities involving the sample mean? Assuming that this condition is true, describe the sampling distribution of x. (b) Assuming the normal model can be used, determine P(X<67.2). (c) Assuming the normal model can be used, determine P(x264.5).
Let X1,..., X10 be a random sample from a population with mean u and variance o2....
Let X1,..., X10 be a random sample from a population with mean u and variance o2. Consider the following estimators for pe: X1 + ... + X10 ê 3X1 - 2X5 +3X10 10 2 Are these estimators unbiased (i.e. is their expectation equal to u)? A. Both estimators are unbiased. C. Only the second is unbiased. E. Insufficient information. B. Both estimators are biased. D. Only the first is unbiased.
A simple random sample of size n 14 is obtained from a population with u 66...
A simple random sample of size n 14 is obtained from a population with u 66 and a 17 (a) What must be true regarding the distribution of the population in order to use the normal model to compute probabilities involving the sample mean? Assuming that this condition is true, describe the sampling distribution of x (b) Assuming the normal model can be used, determine P(x<69.9). (c) Assuming the normal model can be used, determine P(x267.5) (a) What must be...
1. Select all true statements about sample mean and sample median. A) When the population distribution...
1. Select all true statements about sample mean and sample median. A) When the population distribution is skewed, sample mean is biased but sample median is an unbiased estimator of population mean. B) When the population distribution is symmetric, both mean and sample median are unbiased estimators of population mean. C) Sampling distribution of sample mean has a smaller standard error than sample median when population distribution is normal. D) Both mean and median are unbiased estimators of population mean...
A simple random sample of size n= 13 is obtained from a population with u =...
A simple random sample of size n= 13 is obtained from a population with u = 66 and o = 18. (a) What must be true regarding the distribution of the population in order to use the normal model to compute probabilities involving the sample mean? Assuming that this condition is true, describe the sampling distribution of x. (b) Assuming the normal model can be used, determine P(x<69.2). (c) Assuming the normal model can be used, determine P(x267.5). (a) What...
1- Suppose a simple random sample of sizen is drawn froma large population with mean u...
1- Suppose a simple random sample of sizen is drawn froma large population with mean u and standard deviation o. The sampling distribution of x has mean ug and standard deviation= 2- As the number of degrees of freedom in the t-distribution increase, the spread of the distribution 3- True or False: The value of to.10 with 5 degrees of freedom is greater than the value of to.10 with 10 degrees of freedom. 4- True or False: To construct a...
In order to conduct a hypothesis test for the population mean, a random sample of 24...
In order to conduct a hypothesis test for the population mean, a random sample of 24 observations is drawn from a normally distributed population. The resulting sample mean and sample standard deviation are calculated as 4.8 and 0.8, respectively. (You may find It useful to reference the appropriate table: z table or t table) Fot" 5 4.5 against Hu > 4.5 a-1. Calculate the value of the test statistic. (Round all intermediate calculations to at least 4 decimal places and...
In order to gather the opinion of students regarding online assignments, data will be collected from STAT 1000 students who are currently registered in the course. The researcher decides to divide the students into two groups, 1) students who have never taken this course before and 2) students who have taken this course before. Ten students will be randomly selected from each of the two groups. The sample thus selected is a Select one: a. Convenience sample b. Voluntary response...
Solve 7,10,11,12 in business stat 2430
Name: The mayors office wants to know how people in the city feel about the condition of the city's roads. They place an announcement in the newspaper asking residents to email their opinions to the mayor's office. Five hundred people send e als and about 84% of the responses indicate displeasure with the condition of the city's roads A) This is a simple random sample. It gives very accurate results B) This is a...
A simple random sample of size n = 41 is obtained from a population with u = 67 and o = 17. (a) What must be true regarding the distribution of the population in order to use the normal model to compute probabilities involving the sample mean? Assuming that this condition is true, describe the sampling distribution of x. (b) Assuming the normal model can be used, determine P«<71.4). (c) Assuming the normal model can be used, determine Plă 269.3).
A simple random sample of size n = 46 is obtained from a population with u = 63 and o = 16. (a) What must be true regarding the distribution of the population in order to use the normal model to compute probabilities involving the sample mean? Assuming that this condition is true, describe the sampling distribution of x. (b) Assuming the normal model can be used, determine P(X<67.2). (c) Assuming the normal model can be used, determine P(x264.5).
Let X1,..., X10 be a random sample from a population with mean u and variance o2. Consider the following estimators for pe: X1 + ... + X10 ê 3X1 - 2X5 +3X10 10 2 Are these estimators unbiased (i.e. is their expectation equal to u)? A. Both estimators are unbiased. C. Only the second is unbiased. E. Insufficient information. B. Both estimators are biased. D. Only the first is unbiased.
A simple random sample of size n 14 is obtained from a population with u 66 and a 17 (a) What must be true regarding the distribution of the population in order to use the normal model to compute probabilities involving the sample mean? Assuming that this condition is true, describe the sampling distribution of x (b) Assuming the normal model can be used, determine P(x<69.9). (c) Assuming the normal model can be used, determine P(x267.5) (a) What must be...
A simple random sample of size n= 13 is obtained from a population with u = 66 and o = 18. (a) What must be true regarding the distribution of the population in order to use the normal model to compute probabilities involving the sample mean? Assuming that this condition is true, describe the sampling distribution of x. (b) Assuming the normal model can be used, determine P(x<69.2). (c) Assuming the normal model can be used, determine P(x267.5). (a) What...
1- Suppose a simple random sample of sizen is drawn froma large population with mean u and standard deviation o. The sampling distribution of x has mean ug and standard deviation= 2- As the number of degrees of freedom in the t-distribution increase, the spread of the distribution 3- True or False: The value of to.10 with 5 degrees of freedom is greater than the value of to.10 with 10 degrees of freedom. 4- True or False: To construct a...
In order to conduct a hypothesis test for the population mean, a random sample of 24 observations is drawn from a normally distributed population. The resulting sample mean and sample standard deviation are calculated as 4.8 and 0.8, respectively. (You may find It useful to reference the appropriate table: z table or t table) Fot" 5 4.5 against Hu > 4.5 a-1. Calculate the value of the test statistic. (Round all intermediate calculations to at least 4 decimal places and...
Most questions answered within 3 hours.
-
Considering the length of the
resonance tube you used, what is the lowest frequency tuning fork...
asked 10 minutes ago -
what is ku klux klan hood and robe? is it against the law? legal or
illegal?...
asked 8 minutes ago -
Imagine that you are the (now former) CEO (Marissa Mayer) of
Yahoo! and wish to eliminate...
asked 11 minutes ago -
A star has a mass of 3 solar masses (3 times the mass of the
Sun)....
asked 10 minutes ago -
The random variable X, representing the number of errors per 100
lines of software code, has...
asked 16 minutes ago -
Looking for some assistance with C++ code using visual studio
for the following:
Input file:
Field...
asked 21 minutes ago -
Aqueous sulfuric acid H 2 SO 4 will react with solid sodium
hydroxide NaOH to produce...
asked 26 minutes ago -
c++ program need help
Write a function allBigger that takes 3 parameters: 2 arrays of floats...
asked 49 minutes ago -
Underwater mortgages ~ A mortgage is termed “underwater” if the
amount owed is greater than the...
asked 48 minutes ago -
A 25ml pipet sample of an alcohol is found
asked 51 minutes ago -
8. The presidents of the past century have a mean height of 70.3
inches and a...
asked 54 minutes ago -
What do you think is the most difficult item for the union to
negotiate? Why?
asked 52 minutes ago