Answered step by step
Verified Expert Solution
Question
1 Approved Answer
Students who have completed a speed reading course have readings speeds that are normally distributed with a mean of 950 words per minute and a
Students who have completed a speed reading course have readings speeds that are normally distributed with a mean of 950 words per minute and a standard deviation equal to 220 words per minute.10 students are selected at random.
What is the standard deviation of the number of students who read at less than 850 words per minute?
A. 220
B. 10
C. 2.13
D. 1.46
What is the probability that at the most two of them would read at less than 850 words per minute?
A. 0.22
B. 0.64
C. 0.36
D. 0.78
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