copy and electronically file a 1040 tax form. The distribution of times follows the
mormal distribution and the standard deviation is 80 minutes. A consumer watchdog
agency selects a random sample of 40 taxpayers.
a. What is the standard error of the mean in this example ?
b. What is the likelihood the sample mean is greater than 320 minutes ?
c. What is the liklihood the sample mean is between 320 and 350 minutes ?
d. What is the likelihood the sample mean is greater than 350 minutes ?
Recently Asked Questions
- what is the lower limit of the 99% confidence interval what is the upper limit of the 99% confidence interval
- A psychologist wants to estimate the standard deviation of IQ scores. It is widely believed that IQ scores follow a normal distribution. Her random sample of
- Show detail work 1. Iron (atomic mass 55.85 g/mol) crystallizes in a body-centered cubic unit cell. If the length of an edge of the unit cell is 287 pm, what