Homework Answers
Ans: True
When all values of sample are equal, mean will also be the same as this value. So, none of the values will have any deviation from mean and hence, the standard deviation will be zero.
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If all of the values in the sample are identical, the sample standard deviation will always...
1.When using a sample standard deviation instead of a population standard deviation to estimate a population...
1.When using a sample standard deviation instead of a population standard deviation to estimate a population mean, more variability is introduced. True False 2.When writing the null hypothesis, an = must ALWAYS be used . True False
The population standard deviation a. is always the same as the sample standard deviation. ...
The population standard deviation a. is always the same as the sample standard deviation. b. measures something different than the sample standard deviation. c. corresponds to the median of the population. d. is usually known. e. affects the dispersion in the sampling distribution of the sample mean
If the sample size is greater than one, the standard deviation of the sample mean (i.e.,...
If the sample size is greater than one, the standard deviation of the sample mean (i.e., standard error) is always smaller than the population standard deviation. True, False
If there are outliers (extreme values) in a sample, which of the following is ALWAYS true?...
If there are outliers (extreme values) in a sample, which of the following is ALWAYS true? a. The mean is greater than the median. b. The standard deviation is smaller than expected (smaller than if there were no outliers) DC. The mean will be less than the median im d. The standard deviation will be larger than expected (larger than if there were no outliers)
The sample variance or the sample standard deviation are good approximate of the population variance or...
The sample variance or the sample standard deviation are good approximate of the population variance or standard deviation? True False
Cholesterol levels are measured on a random sample of 1,000 persons and sample standard deviation is...
Cholesterol levels are measured on a random sample of 1,000 persons and sample standard deviation is calculated and standard error of the sample mean is also calculated. Suppose a second survey were repeated in the SAME population, but the sample size tripled to 3,000 persons. 1. The sample standard deviation of the second sample is going to be smaller than that of the first sample. A. True B. False 2. The sample mean of the second sample is going to...
1. All of the following are characteristics of the standard deviation except? A. The lower...
1. All of the following are characteristics of the standard deviation except? A. The lower the standard deviation, the more similar the observations in the dataset. B. Is a measure of the spread of a dataset C. Is robust to outliers D. Is always positive E. Is the square root of the sample variance 2. Two events are mutually exclusive if A. They are not independent B. Their union equals zero C. ...
QUESTION 1 1. The sample variance or the sample standard deviation are good approximate of the...
QUESTION 1 1. The sample variance or the sample standard deviation are good approximate of the population variance or standard deviation? True or False QUESTION 2 1. The Central limit theorem states that the individual results or when n is 1 in an experiment that unique outcome follow a Normal Distribution? True or False QUESTION 3 1. In hypothesis testing alpha is the probability of being judged correct? True or False QUESTION 4 1. If the critical Z is ±...
The standard deviation of the sampling distribution of the sample mean is the same as the...
The standard deviation of the sampling distribution of the sample mean is the same as the population standard deviation according to the Central limit Theorem. (Ch8) True False
The standard deviation of the population is commonly used to estimate the standard deviation of the...
The standard deviation of the population is commonly used to estimate the standard deviation of the sample. True False
If there are outliers (extreme values) in a sample, which of the following is ALWAYS true? a. The mean is greater than the median. b. The standard deviation is smaller than expected (smaller than if there were no outliers) DC. The mean will be less than the median im d. The standard deviation will be larger than expected (larger than if there were no outliers)
The standard deviation of the sampling distribution of the sample mean is the same as the population standard deviation according to the Central limit Theorem. (Ch8) True False
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