1)When can a Standard Deviation for set of 5 numbers be zero?In other words, what kind of relationship must exist among all numbers in order for StandardDeviation to be zeroHint: Standard DeviationE(X¡ - Mean)²/(n – 1)

We will find required condition.

Answered: 1)When can a Standard Deviation for set…

Algebra and Trigonometry (6th Edition)

6th Edition

ISBN:9780134463216

Author:Robert F. Blitzer

Publisher:Robert F. Blitzer

ChapterP: Prerequisites: Fundamental Concepts Of Algebra

Section: Chapter Questions

Problem 1MCCP: In Exercises 1-25, simplify the given expression or perform the indicated operation (and simplify,...

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A country of the mean birth rate for full term (after 40 weeks) is 3490 grams with a standard deviation of 500 grams. (a) is a birth weight of 2900 grams more than one standard deviation below the mean .(yes/no) (b) is a birth weight of 3975 grams more than one one standard deviation above the mean ? (yes/no)
Chebyshev's Theorem states that for any set of numbers, the fraction that will like within k Standard deviations of the mean is at least 1- 1/k2. Use this theorem to find the fraxtion of all the numbers of a data that must lie within 3 standard deviations from the mean.
There are two samples of children taken from a population. In the first sample, mean of age of 20 children is 8.5 years with standard deviation 3 years. In the second sample mean of age of 30 children is 7 years with standard deviation 2 years. If we combine these samples, what are the mean and the standard deviation of the combined sample? Age in which sample is more spread and why? Show your work by using formula and use 1 decimal place.
In 1940 the average size of a U.S. farm was 174 acres. Let's say that the standard deviation was 51 acres. Suppose we randomly survey 45 farmers from 1940 How do I solve this question: "The middle 50% of the distribution for X, the bounds of which form the distance represented by the IQR, lies between what two values? (answer must be rounded to two decimal places)"
The lengths of pregnancies in a small rural village are normally distributed with a mean of 267 days and a standard deviation of 14 days. A distribution of values is normal with a mean of 267 and a standard deviation of 14. What percentage of pregnancies last fewer than 274 days? P(X < 274 days) Let XX represent the full height of certain species of tree. Assume that XX is normally distributed with a mean of 82.1 feet and a standard deviation of 47.9 feet.Find the probability that the full height of a randomly selected tree is greater than 154 feet. P(X>154)
a standardize exam scores are normally distributed,in a recent year,the mean test scores was 1490,standard deviation was 320,the test sscores four for studentselected at a random are;1940,1249,and 1380.Find the Zscores that correspond to each vale and determine whether any of the values are unusual
A population has mean u=30 and standard deviation o=7. (A) Find the z-score for a population value of 9. (B) Find the z-score for a population value of 51. (C) What number has a z-score of -2.3
Use the formula to find the standard error of the distribution of differences in sample means, ₁ - X₂. Samples of size 105 from Population 1 with mean 86 and standard deviation 13 and samples of size 80 from Population 2 with mean 73 and standard deviation 16 Round your answer for the standard error to two decimal places. standard error =
If the population average height is 67" and you take a random sample of 25 people resulting in a sample average value of 66 with a standard deviation of 2. Determine the "t" score that you would use as a test score for this data, and solve it for "t".
The standard error of estimate is the standard deviation of the observed x-values about the predicted x values TRUE OR FALSE
From generation to generation, the mean age when smokers first start to smoke varies. However, the standard deviation of that age remains constant at around 2.1 years. A survey of 38 smokers of this generation was done to see if the mean starting age is at least 19. The sample mean was 18.1 with a sample standard deviation of 1.3. Do the data support the claim at the 5% level? (i) Alpha (Enter an exact number as an integer, fraction, or decimal.)? =
popular standard deviation can be calculated in SPSS by .

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1)When can a Standard Deviation for set of 5 numbers be zero? In other words, what kind of relationship must exist among all numbers in order for Standard Deviation to be zero Hint: Standard Deviation νΣ-Μean) / (n-1)