We have to deal with score at Statistical Methods I :
Here X ~ N( = 80, =8)
Note that,
Given that,
(Value from z table)
Therefore, the value of k is 62.8.
z table :
QUESTION 19 Sale SHS, wyremally distried with a 80 and standard deviation and the mean and...
In a certain class, test scores average out to 60, with a standard deviation of 20, as do scores on the final. The correlation between test scores and the final scores is about 0.5. Estimate the average final score for the students whose test score was: 80 A. 67 B. 80 C. 85 D. 70
in a certain class, test scores average out to 60, with a standard deviation of 20, as do scores on the final. The correlation between test scores and the final scores is about 0.5. Estimate the average final score for the students whose test score was: 60 A. 60 B. 70 C. 50 D. 80
USE R COMMANDS PLEASE Exercise 1: Entry to a certain University is determined by a national test. The scores on this test are normally distributed with a mean of 520 and a standard deviation of 80. Use R commands to answers the following questions (a) Tom wants to be admitted to this university and he knows that he must score better than at least 75% of the students who took the test. Tom takes the test and scores 595. Will...
Problem 1. 531.1 and standard deviation a-29.4 (2 points) The scores of students on the SAT colloge entrance examinations at a certain high school had a normal distribution with mean (a) What is the probability that a single student randomly chosen from all those taking the test scores 536 or higher? ANSWER For parts (b) through (d), consider a simple random sample (SRS) of 30 students who took the test (b) What are the mean and standard deviation of the...
In a certain class, test scores average out to 60, with a standard deviation of 20, as do scores on the final. The correlation between test scores and the final scores is about 0.5. Estimate the average final score for the students whose test score was: 20 A. 20 B. 60 C. 50 D. 40
Scores on a certain test were normally distributed with a mean of 80 and a standard deviation of ± 12. What is the probability that a given student got a score more than 80? Your answer should be correct to four decimal places.
(1 point) The scores of students on the SAT college entrance μ-544.6 and standard deviation σ-25.3 (a) What is the ANSWER: that a single student randomly chosen from all those taking the test scores 548 or higher? For parts (b) through (d), consider a simple random sample (SRS) of 35 students who took the test. b) What are the mean and standard deviation of the sample mean score , of 35 students? The mean of the sampling distribution for is:...
Given that on one section of the SAT the mean is 500 and the standard deviation is 100, what is the approximate probability of selecting a student whose score is 400 or lower followed by selecting a student whose score is 500 or higher on the test?
please be 100 percent sure for s thumbs up 6) An educational researcher wanted to know if in-class activities significantly improved students' learning compared to traditional lecture only teaching methods. Ten students matched on GPA were randomly selected from the current student population. One student from each pair was randomly assigned to either the 'Lecture Only' class or 'Lecture+ Group Activities' class. At the end of the semester, students final exam scores were recorded and teaching methods were compared. The...
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 _______