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# Popular Questions - Statistics

## What is the mode, median, and mean of 3, 12, 11, 7, 5, 5, 6, 4, 10?

Mode is ##5##, median is ##6## and mean is ##7##. Let us write the given data points in increasing order. These are ##{3,4,5,5,6,7,10,11,12}## Now mode is the data point which appears most time and...

## What is the purpose of double blind experiments?

here the answer is quite simple Double blind experiments, in the context of medicine, are those in which neither the participants nor the experimenter is aware of who is receiving a treatment and...

## What is the purpose of an ogive?

An ogive, also known as a cumulative histogram, is a graph that is used to determine the number of data points that are equal to or below a certain value in a data set. An ogive is different from a...

## What is the difference between the R-Squared and adjusted R-Squared when running a regression analysis?

Adjusted R-squared applies only to multiple regression As you add more independent variables to a multiple regression, the value of R-squared increases giving you the impression that you have a...

## How do you find the z-score for sample mean M = 90 for a sample of n = 4?

##z=(bar x-mu)/sigma## Population standard deviation must be known for calculating z scores. You can also replace this by sample s.d. if sample size is large enough. So while you have given us the...

## How is the confidence interval formula for the slope similar to other confidence intervals that we have calculated?

it has the same format. eg. 95% CI for ##B_1## = ##b_1## ##+_-## SE(##b_1##)