Question
A random sample of size n = 50 is taken from a population with mean = 9.5 and standard deviation = 2. [You may find
A random sample of size n = 50 is taken from a population with mean = 9.5 and standard deviation = 2. [You may find it useful to reference the z table.]
a. Calculate the expected value and the standard error for the sampling distribution of the sample mean. (Negative values should be indicated by a minus sign. Round "expected value" to 1 decimal place and "standard deviation" to 4 decimal places.)
b. What is the probability that the sample mean is less than 10? (Round "z" value to 2 decimal places, and final answer to 4 decimal places.)
c. What is the probability that the sample mean falls between 10 and 9? (Round "z" value to 2 decimal places, and final answer to 4 decimal places.)
Step by Step Solution
There are 3 Steps involved in it
Step: 1
Get Instant Access to Expert-Tailored Solutions
See step-by-step solutions with expert insights and AI powered tools for academic success
Step: 2
Step: 3
Ace Your Homework with AI
Get the answers you need in no time with our AI-driven, step-by-step assistance
Get Started