Samples: Practical Examples & Tips

A population distribution has mean 50 and standard deviation 20. For a random sample of size 100, what is the mean and standard error of the sampling distribution of the sample mean?

Makayla Eaton 2022-08-17

Why can the samples of platinum and copper have the same extensive properties but not the same intensive properties?

vroos5p 2022-08-16

2. Manuela is looking for all the factors of 90. So far, she has divided 90 by all the counting num- bers from 1 to 10, listing those numbers that divide 90 and listing the corresponding quotients. Here is Manuela's work so far:
$1, 90 1 \times 90 = 90 2, 45 2 \times 45 = 90 3, 30 3 \times 30 = 90 5, 18 5 \times 18 = 90 6, 15 6 \times 15 = 90 9, 10 9 \times 10 = 90 10, 9 10 \times 9 = 90$
Should Manuela keep checking numbers to see if any numbers larger than 10 divide 90, or can
Manuela stop dividing at this point? If so, why? What are all the factors of 90?

trokusr 2022-08-16

How does a census differ from a sample?

heelallev5 2022-08-15

The first sample mean distribution is based on samples of size n=100 and the second is based on sample of size n=225. Which sample mean distribution has the smaller standard error? Why?

Matonya 2022-08-11

Can a two-sample t-test be used if the samples are of a different size?

Yair Valentine 2022-08-11

Two samples at liquid as x and y boils at 100 degree Celsius and 103 degree Celsius which sample of liquid will freeze at 0 degree Celsius and Why?

latinoisraelm1 2022-08-10

What is the sample space of flipping a coin?

yongenelowk 2022-08-07

How do random samples and stratified samples differ?

Trystan Castaneda 2022-08-06

What happens to the standard error each time you quadruple the sample size?

Garrett Sheppard 2022-08-05

How can a researcher avoid a biased sample?

Stephanie Hunter 2022-07-23

What is the primary objective of sampling from a population?

Donna Flynn 2022-07-21

What conditions must be met for conducting a two-sample t test for the means?

Levi Rasmussen 2022-07-21

Why does the margin of error decrease as the sample size n increases?

Javion Henry 2022-07-21

How can convenience samples be biased?

Emmanuel Pace 2022-07-19

In the Florida lottery game, you select six numbers from a pool of numbers from 1 to 53 (see flalottery.com). Each wager costs $1. You win the jackpot if you match all six numbers that you have selected (Questions f to i are optional. Questions f to i will not be graded). Find the probability of a) Wining the jackpot. b) Matching five numbers. c) Matching four numbers. d) Matching three numbers. e) Matching two numbers.

Cristofer Graves 2022-07-16

How can separate samples of optical isomers be distinguished?

Statistics samples are a way for researchers to learn about a population by studying a smaller group. They allow researchers to make conclusions about a larger group based on data gathered from a sample that represents the population. Sampling methods aim to create a sample that accurately reflects the population and minimizes bias. Samples are also used to test hypotheses about the population and gather insights that would be difficult to obtain otherwise.

Explore Samples with Step-by-Step Examples and Expert Guidance