12. If two groups of numbers have the same mean, then their standard deviations must also...
12.
If two groups of numbers have the same mean, then
|
their standard deviations must also be equal. |
|
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their medians must also be equal. |
|
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their modes must also be equal. |
|
|
other measures of location need not be the same |
13.
The Sample Mean
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can never be negative. |
|
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can assume any value between the highest and the lowest value in the sample. |
|
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can never be zero. |
|
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is always smaller than the mean of the population from which the sample was taken |
Homework Answers
Solution :
12)
If two groups of numbers have the same mean, then
other measures of location need not be the same
13)
The sample mean can never be negative .
Add Answer to:
12.
If two groups of numbers have the same mean, then
their standard deviations must also...
Consider two populations with the same mean. Since they have the same mean, then: Their standard...
Consider two populations with the same mean. Since they have the same mean, then: Their standard deviations must also be the same. Their medians must also be the same. Their modes must also be the same. None of these is correct.
QUESTION 12 The p-value is the same as the Z statistic measures the number of standard deviations from the mean is...
QUESTION 12 The p-value is the same as the Z statistic measures the number of standard deviations from the mean is a distance is a probability QUESTION 13 For a two tail test, the p-value is the probability of obtaining a value for the test statistic more extreme than that provided by the sample less extreme than that provided by the sample more extreme than that provided by the population less extreme than that provided by the population Which of...
Three randomly selected households are surveyed. The numbers of people in the households are 2, 4,...
Three randomly selected households are surveyed. The numbers of people in the households are 2, 4, and 12. Assume that samples of size n=2 are randomly selected with replacement from the population of 2, 4, and 12. Listed below are the nine different samples. Complete parts (a) through (c). 22,22 22,44 22,1212 44,22 44,44 44,1212 1212,22 1212,44 1212,1212 a. Find the median of each of the nine samples, then summarize the sampling distribution of the medians in the format of...
Three randomly selected households are surveyed. The numbers of people in the households are 2, 4,...
Three randomly selected households are surveyed. The numbers of people in the households are 2, 4, and 12. Assume that samples of size n=2 are randomly selected with replacement from the population of 2, 4, and 12. Listed below are the nine different samples. Complete parts (a) through (c). 22,22 22,44 22,1212 44,22 44,44 44,1212 1212,22 1212,44 1212,1212 a. Find the median of each of the nine samples, then summarize the sampling distribution of the medians in the format of...
Someone can help here explaining in an organized and easy way. Three randomly selected households are surveyed. The numbers of people in the households are 1, 4, and 10' Assume that samples of si...
Someone can help here explaining in an organized and easy
way.
Three randomly selected households are surveyed. The numbers of people in the households are 1, 4, and 10' Assume that samples of size n 2 are randomly selected with replacement from the population of 1, 4, and 10. Construct a probability distribution table that describes the sampling distribution of the proportion of even numbers when samples o sizes n = 2 are randomly selected Does he mean o the...
help Two samples are taken with the following sample means, sizes, and standard deviations īj =...
help
Two samples are taken with the following sample means, sizes, and standard deviations īj = 29 12 = 36 71 = 72 n2 = 53 81 = 482 = 3 We want to estimate the difference in population means using a 86% confidence level. What distribution does this require? Oz Ot, df = 123 NOTE: The more accurate df formula, used above, is: 2 + 1 72 df 2 2 + - ni 12 1 12 What is a?...
8) The following numbers represent quiz scores for 15 students. What is the mean score? (Enter...
8) The following numbers represent quiz scores for 15 students. What is the mean score? (Enter your answer rounded to the tenths place, e.g. enter 8.3 instead of 8. Do not include units.) 4,5,5,6,7,7,7,8,8,8,9,9,9,9,10 Answer: For the distribution of quiz scores above, what is the median quiz score? Answer: 9) 10) Which of the following statements is always true? a). Half of the data is above the mean and half of the data is below the mean b). There are...
True or False 1 point each) (Correct the ones that are false, carn an extra credit point for each...
True or False 1 point each) (Correct the ones that are false, carn an extra credit point for each.) The statistical method appropriate for summarizing data depends on whether the data are categorical or quantitative. Whenever a dataset contains extreme values, the mean is preferred over the median as a mcasure ot central location. 1. 2. 3. The recommended number of classes for a frequency distribution is 8. 4. A ste and leaf display can show rank order and shape...
QUESTION 11 The starting salaries of individuals with an MBA degree are normally distributed with a...
QUESTION 11 The starting salaries of individuals with an MBA degree are normally distributed with a mean of $90,000 and a standard deviation of $20,000. What percentage of MBA's will have starting salaries of $77,000 to $99,000? 27.99% 42.07% 30.50% 41.58% QUESTION 12 The starting salaries of individuals with an MBA degree are normally distributed with a mean of $90,000 and a standard deviation of $20,000. Suppose we randomly select 9 of these individuals with an MBA degree. What is...
1. A ________ is a sample statistic such as the mean or a proportion that serves...
1. A ________ is a sample statistic such as the mean or a proportion that serves as an estimate of the same value in the population. population parameter confidence level point estimate confidence interval standard error of the mean 2. we can differentiate among variables in terms of their levels of measurement, or the mathematical nature of the values of a variable. For example, the values of a variable measured at the __________ level have an inherent rank order with...
QUESTION 12 The p-value is the same as the Z statistic measures the number of standard deviations from the mean is a distance is a probability QUESTION 13 For a two tail test, the p-value is the probability of obtaining a value for the test statistic more extreme than that provided by the sample less extreme than that provided by the sample more extreme than that provided by the population less extreme than that provided by the population Which of...
Someone can help here explaining in an organized and easy
way.
Three randomly selected households are surveyed. The numbers of people in the households are 1, 4, and 10' Assume that samples of size n 2 are randomly selected with replacement from the population of 1, 4, and 10. Construct a probability distribution table that describes the sampling distribution of the proportion of even numbers when samples o sizes n = 2 are randomly selected Does he mean o the...
help
Two samples are taken with the following sample means, sizes, and standard deviations īj = 29 12 = 36 71 = 72 n2 = 53 81 = 482 = 3 We want to estimate the difference in population means using a 86% confidence level. What distribution does this require? Oz Ot, df = 123 NOTE: The more accurate df formula, used above, is: 2 + 1 72 df 2 2 + - ni 12 1 12 What is a?...
8) The following numbers represent quiz scores for 15 students. What is the mean score? (Enter your answer rounded to the tenths place, e.g. enter 8.3 instead of 8. Do not include units.) 4,5,5,6,7,7,7,8,8,8,9,9,9,9,10 Answer: For the distribution of quiz scores above, what is the median quiz score? Answer: 9) 10) Which of the following statements is always true? a). Half of the data is above the mean and half of the data is below the mean b). There are...
True or False 1 point each) (Correct the ones that are false, carn an extra credit point for each.) The statistical method appropriate for summarizing data depends on whether the data are categorical or quantitative. Whenever a dataset contains extreme values, the mean is preferred over the median as a mcasure ot central location. 1. 2. 3. The recommended number of classes for a frequency distribution is 8. 4. A ste and leaf display can show rank order and shape...
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