STAT1
posted by HELPPPPP .
In the quiz in Exercises 1 and 2, the grading scheme is as follows: each right answer is awarded 5 points, and 1 point is taken off for each wrong answer. Recall that the quiz consists of 10 questions, and that in the class, the average number of right answers is 6.2 and the SD of the number of right answers is 1.4. In what follows, it will help to express a student’s score in terms of the number of right answers the student got.
1. Find the average score of the class.
2. Find the SD of scores of the class.
Respond to this Question
Similar Questions

Statistics
In the quiz in Exercises 1 and 2, the grading scheme is as follows: each right answer is awarded 5 points, and 1 point is taken off for each wrong answer. Recall that the quiz consists of 10 questions, and that in the class, the average … 
Statistics
A quiz consists of 10 multiple choice questions. Each question is marked either “right” or “wrong.” Each right answer gets 5 points, and 1 point is taken off for each wrong answer. The correlation between the number of right … 
math
a quiz has 25 questions with 4points awarded for each correct answer and 1 point deducted for each incorrect answer,with zero for each question omitted.John scores 77points.how many questions did he omit? 
Statistic
There are two independent multiplechoice quizzes where quiz 1 has eight questions and quiz 2 has 15 questions. Each question in the first quiz has four choices and each question in the second quiz has five choices. Suppose a student … 
Math
A multiple  choice quiz contains 5 questions with 4 choices for each answer. A student passes the quiz if they get at least an 80% on the quiz . If a student guesses on every question , find the probability that she passes the quiz … 
Discrete Math
A quiz consists of 3 multiple choice questions, each of which have 10 answer choices. You are allowed three attempts at the quiz. What is the probability that someone would end up with a perfect score for the quiz simply by guessing … 
MATH
A quiz consists of 90 multiplechoice questions, each with 4 possible answers (A, B, C and D). For someone who makes random guess , A is the correct answer for all the questions. If each right answer carries 4 marks and each wrong … 
MATH
A quiz consists of 90 multiplechoice questions, each with 4 possible answers (A, B, C and D). For someone who makes random guess , A is the correct answer for all the questions. If each right answer carries 4 marks and each wrong … 
Math
A quiz has 20 questions with 5 points awarded for each correct answer and one point deducted for each incorrect answer, with 0 for each question omitted, Larry scored 72 points. How many questions did he omit? 
Math
Jasmine has taken a quiz she ks on question 16 and has completed 20% of the quiz. How many questions does the quiz have?