if statistics test scores were normally distributed with a mean of 81 and a standard deviation...
if statistics test scores were normally distributed with a mean of 81 and a standard deviation of 4,
a) what is the probability that a randomly selected student scored less than 70?
b) what percentage of students had a B on the exam?
c) the top 10% of the class had what grades?
Homework Answers
Add Answer to:
if statistics test scores were normally distributed with a mean
of 81 and a standard deviation...
The final exam scores in a statistics class were normally distributed with a mean of 70...
The final exam scores in a statistics class were normally distributed with a mean of 70 and a standard deviation of five. What is the probability that a student scored more than 75% on the exam? a) 0.95 b)0.68 c) 0.16 d)0.84
The final exam scores in a business class were normally distributed with a mean of 80.5%...
The final exam scores in a business class were normally distributed with a mean of 80.5% and a standard deviation of 4. Find the probability that a randomly selected student scored less than 73.9%.
The final exam scores in a statistics class were normally distributed with a mean of 70...
The final exam scores in a statistics class were normally distributed with a mean of 70 and a standard deviation of 2. If you select a student at random, what is the probability that he scored between a 66 and a 74? A.2.5% B.50% C. 68% C. 95% D. none of the above
Scores on a recent national statistics exam were normally distributed with a mean of 88 and...
Scores on a recent national statistics exam were normally distributed with a mean of 88 and a standard deviation of 2. 1. What is the probability that a randomly selected exam will have a score of at least 85? 2. What percentage of exams will have scores between 89 and 92? 3. If the top 5% of test scores receive merit awards, what is the lowest score eligible for an award? I do not understand how to compute probability.
7. Scores on a recent national Mathematics exam were normally distributed with a mean of 82...
7. Scores on a recent national Mathematics exam were normally distributed with a mean of 82 and a standard deviation of 7. A. What is the probability that a randomly selected exam score is less than 70 B. What is the probability that a randomly selected exam score is greater than 90? C. If the top 2.5% of test scores receive Merit awards, what is the lowest score necessary to receive a merit award?
Exam grades: Scores on a statistics final in a large class were normally distributed with a mean of 79 and a standa...
Exam grades: Scores on a statistics final in a large class were normally distributed with a mean of 79 and a standard deviation of 8. Use the TI-84 PLUS calculator to answer the following. Round the answers to at least four decimal places. (a) What proportion of the scores were above 93? (b) What proportion of the scores were below 66? (c) What is the probability that a randomly chosen score is between 70 and 90?
In a recent year, the total scores for a certain standardized test were normally distributed, with a mean of 500 and a standard deviation of 10.5
In a recent year, the total scores for a certain standardized test were normally distributed, with a mean of 500 and a standard deviation of 10.5. Answer parts (a)-(d) below. (a) Find the probability that a randomly selected medical student who took the test had a total score that was less than 490. (Round to four decimal places as needed.) The probability that a randomly selected medical student who took the test had a total score that was less than 490 is 0.1704 (b)...
Juan took a Statistics exam and earned a 90%. If the exam scores are normally distributed...
Juan took a Statistics exam and earned a 90%. If the exam scores are normally distributed with a mean = 75% and SD = 10%, what is Juan's z score? Based on his z score, what percentage of students scored below Juan? What is the probability of randomly selecting a student who scored below Juan?
Scores on a recent national statistics exam were normally distributed with a mean of 72 and...
Scores on a recent national statistics exam were normally distributed with a mean of 72 and a standard deviation of 10 . What is the probability that a randomly selected exam will have a score between 75 and 80 ?
In a recent year, the total scores for a certain standardized test were normally distributed, with a mean of 500 and a standard deviation of 10.4
In a recent year, the total scores for a certain standardized test were normally distributed, with a mean of 500 and a standard deviation of 10.4. Find the probability that a randomly selected medical student who took the test had a total score that was more than 530. The probability that a randomly selected medical student who took the test had a total score that was more than 530 is _______
Exam grades: Scores on a statistics final in a large class were normally distributed with a mean of 79 and a standard deviation of 8. Use the TI-84 PLUS calculator to answer the following. Round the answers to at least four decimal places. (a) What proportion of the scores were above 93? (b) What proportion of the scores were below 66? (c) What is the probability that a randomly chosen score is between 70 and 90?
Most questions answered within 3 hours.
-
Investor company owns 35% of investee company voting stock and
accounts for the investment under the...
asked 45 minutes ago -
The number of major faults on a randomly chosen 1 km stretch of
highway has a...
asked 1 hour ago -
Consider the competitive environment of Starbuck's, Progressive
Insurance, a manufacturing firm with low turnover, or a...
asked 1 hour ago -
3. Gains from trade
Consider two neighbouring island countries called Euphoria and
Contente. They each have...
asked 3 hours ago -
A business executive has the option to invest money in two
plans: Plan A guarantees that...
asked 6 hours ago -
Hello, can someone please help me answer this question?
How much heat is absorbed by a...
asked 6 hours ago -
. A marketing researcher conducted a survey of 25 shoppers
randomly selected at the local mall...
asked 6 hours ago -
Create an comprehensive response to the
following:
Antimicrobial agents work on a multitude of microbes (bacteria,...
asked 6 hours ago -
6.13 LAB: Step counter. Section 6.3.
A pedometer treats walking 2,000 steps as walking 1 mile....
asked 6 hours ago -
(14.2) A block of mass m = 10 kg riding on a frictionless
horizontal plane is...
asked 6 hours ago -
Use any search engine to search for articles about Starbucks
partnership with Tata Companies in India...
asked 6 hours ago -
Let’s say that for some reason Bank Excess Reserves suddenly
increase sharply. What effect would this...
asked 6 hours ago