When we sample from an infinite population, what happens to the standard error of the mean if the sample size is (a) Increased from 50 to 200?(b) Decreased

The sum of deviation scores in any distribution (population or sample) is always equal to 0.   true or false

I've been given a population (units) mean of 30 and a standard deviation of 1.8. I've been told 6 units have been selected and have been asked to determine what is the distribution of the mean (exponential, normal or uniform), and find the sample mean and standard deviation of these 6 units selected based of the population information.

The Intelligence Quotient (IQ) test scores for adults are normally distributed with a population mean of 100 and a population standard deviation of 20. What is the probability we could select a sample of 70 adults and find the mean of this sample is less than 95?

The difference in the population means divided by the population standard deviation of a study is the blank?

Find the variance if X~N(0, 7) and 95% of the data are between -7 and 7.

Write the formula for the sample mean, X, for ʼn data points. Write the formula for the sample variance, S², for n data points.

How do I use Excel to calculate the SAMPLE STD DEVIATION of a column?

A simple random sample of 36 observations was taken from a large population. The sample mean and the standard deviation was determined to be 80 and 12 respectively. What is the standard error of the mean?

a population has mean score of 50 if five points are added to each score what is the new mean