Blog

When do you choose t distribution?

Because ___ is rarely known, the confidence interval estimates of ____ almost _____ use the t distribution instead of the normal distribution

How do you convert Nonstandard Normal Distribution to a standard Normal Distribution ?

Find 90% CI estimate of the population proportion p from the previous quetstion: p-E < p < P+E

Highway speeds of 60 40 65 70 80 90 85 construct a 99 CI, if the speed limit is 65 mph, df =n-1

The procedure for using a normal distribution to approximate a _____ distribution includes a _________ correction

When do you choose z distribution?

Pew Research revealed 92% of adults know twitter. 5 adults were randomly chosen. What is the probability the first three consecutive adults know twitter.

Pew Research revealed 92% of adults know twitter. 5 adults were randomly chosen. What is the probability the first three consecutive adults know twitter.

A sample of size n= 18 is a simple random sample selected from normal distribution population. Find the Critical Value t_(a/2) corresponding to 99% CL. Use the t table.