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...
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
Calculate and interpret the values of the sample mean and sample standard deviation for the following....
Calculate and interpret the values of the sample mean and sample standard deviation for the following. 87 93 96 98 105 114 128 131 142 168
1. A random sample of 24 values was selected from a population, and the sample standard...
1. A random sample of 24 values was selected from a population, and the sample standard deviation was computed to be 62. Based on this sample result, compute a 90% confidence interval estimate for the true population standard deviation. SOS (Round to two decimal places as needed.)
5. When both sample sizes are 15, both population standard deviation are 10, and the sample...
5. When both sample sizes are 15, both population standard deviation are 10, and the sample averages are 32 and 35 respectively the experimental Z is 0.822. 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
1. A random sample of 24 values was selected from a population, and the sample standard deviation was computed to be 62. Based on this sample result, compute a 90% confidence interval estimate for the true population standard deviation. SOS (Round to two decimal places as needed.)
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