Mean and standard deviation of number of correct answers
Course:- Basic Statistics
Reference No.:- EM13149037

Assignment Help >> Basic Statistics

A test consist of 30 multiple choice questions, each with five possible answers, only one of which is correct. find the mean and standard deviation of the number of correct answers.

Put your comment

Ask Question & Get Answers from Experts
Browse some more (Basic Statistics) Materials
Set up a proportion and solve it to demonstrate this type of business application. (An example might be 5 hours / $20 = 10 hours / x). Remember that setting the cross produc
Based on these data, what is the probability that next Christmas will be dry and based on the data,what is the probability that next Christmas will be rainy or cloudy and dry?
If each ticket costs $3 and 8600 tickets are sold, what are the expected winnings far a ticket buyer? Express to at least three decimal place accuracy in dollar form (as opp
29. The mean preparation fee H&R Block charged retail customers last year was $183 mit Wall Street Journal, March 7, 2012). Use this price as the population mean and assume
uppose we form a new random variable  Z by performing a weighted average of the components of. -Find the values of the constants bI such that the variance of Z  is minimized.
Suppose that Total Revenue = 200Q and Total Cost = 80 + 50Q where Q, the quantity sold, is a random variable with expected value 20 and variance 4.
For the following data obtained from four independent samples, use the 0.025 level in testing H0: 7r1 5 7r2 5 7r3 5 7r4 versus H1: At least one popula- tion proportion diffe
Customers who enter the store, and ask them if they have a Ralph's card. Suppose they solicit 400 customers one day, and find that 160 of them have a Ralph's card.