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Answers to Questions About Standard Deviation Of The Sample Mean

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Resolved Question: Sample mean and sample standard deviation?

An investigator obtains a 95% confidence interval of 33 to 51 for scores from a sample of n = 25 participants. 1.What is the sample mean? 2.What is the sample standard deviation of the scores? Explain how you got to your answers. Thank you.

Resolved Question: How do you calculate standard deviation given only the sample mean?

Just need a clarification on this particular example. On page 723 of http://dipeco.economia.unimib.it/persone/stanca/Economet/stat_app_wool.pdf Example C.3. I'm not sure how the standard deviation was computed using the given sample means. using tha...

Resolved Question: Probability- A random sample of size 64 is chosen from a population with standard deviation 3, and sample mean?

A random sample of size 64 is chosen from a population with standard deviation 3, and sample mean x. Find P (|x- μ | < 1).

Resolved Question: Standard deviation of the sample means will?

The standard deviation of the sample means will ____________ be less than the standard deviation of the population distribution. A) Always B) Never C) Sometimes D) Cannot tell for sure How did you get this answer how can you prove it so I can...

Resolved Question: Standard deviation of the sample means will?

The standard deviation of the sample means will ____________ be less than the standard deviation of the population distribution. A) Always B) Never C) Sometimes D) Cannot tell for sure How did you get this answer how can you prove it so I can...

Resolved Question: Standard deviation of sample means?

Here is a population: {1, 1, 3, 5}. μ = 2.5, and population σ = 1.658. There are 4C2 = 6 ways to choose samples of size n=2, and the means of each of those 6 samples are { 1, 2, 3, 2, 3, 4} with mean 2.5 and population σ = .958. Why is not...

Resolved Question: What is the population standard deviation of the difference between sample means?

Show all calculations please. The sample mean for group 1 is 75.5136 The sample mean for group 2 is 67.0361. The population standard deviation of the sample mean for group 1 is 0.42933 The population standard deviation of the sample mean for group 2...

Resolved Question: Population Mean + Population standard deviation, sample?

Heights of adult women in the United States are normally distributed with a population mean of = 63.5 inches and a population standard deviation of = 2.5. A medical researcher is planning to select a large random sample of adult women to participa...

Resolved Question: What is the mean of the sample means? what is the standard deviation of the sample means?

assume that the heights of women are normally distributed with a mean of 63.3 inches and a standard deviation of 2.5inches. seventy five women are randomly selected. What is the mean of the sample means? what is the standard deviation of the sample m...

Resolved Question: Is the standard deviation of the sample mean always equal to the standard deviation of the population mean?

A random sample of size 16 is drawn from a normal population with unknown mean and known standard deviation equal to 1. Determine the standard deviation of the sample mean. It just seems like there's not enough information unless the standard devia...

Resolved Question: You are give the sample mean and sample standard deviation?

A random sample of 45 eight ounce servings of differnt juice drinks has a mean of 83.1 and a standard deviation of 47.1 calories. What is the 90% confidence interval (_____|______) What is the 95% confidence interval (_____|______)

Resolved Question: Statistics: Using Standard Deviations/Means?

I've been working on this practice problem and I'm really in need of some help - I do not understand how to convert the likelyhood of it from just being with one instance to having the 45 cases. Thanks! Assume that the duration of human pregnancies...

Resolved Question: What is the standard deviation of the sample mean weight?

particular variety of watermelon weighs on average 25.9 pounds with a standard deviation of 1.94 pounds. Consider the sample mean weight of 72 watermelons of this variety. Assume the individual watermelon weights are independent.

Resolved Question: What does Standard Deviation mean?

In lab the other day, we used a 100microliter pipette and weighed 20 samples of deionized water. From the data we were asked to calculate the standard deviation, relative standard deviation, variance, and coefficient of variance. I have the equatio...

Resolved Question: STATISTICS HELP: standard deviations of sample means & standard error?

ok i am so lost with this but feel it is easier to understand than i think? *As reported by Runner's World magazine, the times of the finishers in the New York City 10 km run are normally distributed with a mean of 61 minutes and a standard deviati...

Resolved Question: Finding the sample mean & standard deviation?

Find the sample mean & sample standard deviation of the following 7 data 23 17 15 36 39 34 37

Resolved Question: Stats: Mean and Standard Deviation?

For a normal distribution of mean=580.00 and a standard deviation=80.00. 1. What is the percentile rank of x=390? 2. What is the percentile rank of x=640?

Resolved Question: Help finding sample mean & standard deviation regarding fax pages?

Faced with rising fax costs, a firm issued a guideline that transmissions of 10 pages or more should be sent by 2-day mail instead. Exceptions are allowed, but they want the average to be 10 or below. The firm examined 35 randomly chosen fax transmis...

Resolved Question: Mean and Standard Deviation?

What effect does increasing the sample size have on mean and standard deviation? Does increasing sample size make it more likely to find a difference?

Resolved Question: How do you find the standard deviation if you only have a sample mean and a sample variance?

I do not have a sample size... I only have two numbers, the mean and the variance.

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