One college class had a total of 90 students. The average score for the class on...
One college class had a total of 90 students. The average score for the class on the last exam was 86.3 with a standard deviation of 4.4.
A random sample of 39 students was selected.
a. Calculate the standard error of the mean.
b. What is the probability that the sample mean will be less than 88?
c. What is the probability that the sample mean will be more than 87?
d. What is the probability that the sample mean will be between 85.5 and 87.5?
a. The standard error of the mean is
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One college class had a total of 90 students. The average score
for the class on...
Hey!! CAN SOMEONE PLEASE ANSWER FOR ME QUICK THANKYOU! One college class had a total of...
Hey!! CAN SOMEONE PLEASE ANSWER FOR ME QUICK THANKYOU!
One college class had a total of 80 students. The average score for the class on the last exam was 82.6 with a standard deviation of 5.3. A random sample of 35 students was selected. a. Calculate the standard error of the mean. b. What is the probability that the sample mean will be less than 84? c. What is the probability that the sample mean will be more than 83?...
a simple random sample of 26 college students showed a mean credit score of 575 and...
a simple random sample of 26 college students showed a mean credit score of 575 and a standard deviation 10. construct the 90% confidence interval estimate of the mean credit score for all college students a. state the critical value b. compute the margin of error c. state the confidence interval
Students taking a standardized IQ test had a mean score of 98 with a standard deviation...
Students taking a standardized IQ test had a mean score of 98 with a standard deviation of 12. If a random sample of 36 students is selected, find the probability that their mean score is less than 94. Leave your answer as a decimal with 4 decimal places.
A class of 15 students took a quiz. The quiz scores where the following: 90, 81...
A class of 15 students took a quiz. The quiz scores where the following: 90, 81 88, 87, 86, 80, 80, 70,99, 100, 88, 78, 83,91, and 83. What was the mean score on the quiz? A. 87.5 ○B.” ° C. 85.6 O D. 84 小 0 Type here to search
The average GRE score at the University of Pennsylvania for the incoming class of 2016-2017 was...
The average GRE score at the University of Pennsylvania for the incoming class of 2016-2017 was 311 with a standard deviation of 13.5. If you select a random sample of 60 students, what is the probability that the sample mean will be less than 314? Round your answer to three decimal places.
Example: In a class of 3 students, the average score on the final exam is 75%...
Example: In a class of 3 students, the average score on the final exam is 75% and standard deviation of 5%. Amy got 80% on the final exam. How many standard deviations better than the mean is that? Mandy got 70%. How many standard deviations is Mandy's score deviate from the mean? Judy got 75%. How many standard deviation is Judy's score deviate from the mean?
An administrator at a college claims that the mean SAT Mathematics score of incoming students is...
An administrator at a college claims that the mean SAT Mathematics score of incoming students is 520. You find that in a random sample of 45 incoming students, the mean SAT Mathematics score is 511 with a standard deviation of 48.65. Assume the population of scores are normally distributed. Suppose you perform a hypothesis test to determine whether the mean SAT Mathematics score of incoming students is less than 520. What is the P-value for this hypothesis test? Round the...
The scores of students on the SAT college entrance examinations at a certain high school had...
The scores of students on the SAT college entrance examinations at a certain high school had a normal distribution with mean μ=556.6 and standard deviation σ=27.7.(a) What is the probability that a single student randomly chosen from all those taking the test scores 562 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 x̅x̅, of 35 students?The mean...
The scores of students on the SAT college entrance examinations at a certain high school had...
The scores of students on the SAT college entrance examinations at a certain high school had a normal distribution with mean μ=557.1 and standard deviation σ=29. (a) What is the probability that a single student randomly chosen from all those taking the test scores 562 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 x¯, of...
1. To determine the average number of hours spent studying by college students per week, a...
1. To determine the average number of hours spent studying by college students per week, a sample of 39 students was randomly selected, and found to spend an average of 17.1 hours per week, with a standard deviation of 4.3 hours. Find the 90% confidence interval for the mean number of hours spent studying per week by all college students. What is the upper and lower bound? 2. If I asked a random student how many hours they study per...
Hey!! CAN SOMEONE PLEASE ANSWER FOR ME QUICK THANKYOU!
One college class had a total of 80 students. The average score for the class on the last exam was 82.6 with a standard deviation of 5.3. A random sample of 35 students was selected. a. Calculate the standard error of the mean. b. What is the probability that the sample mean will be less than 84? c. What is the probability that the sample mean will be more than 83?...
A class of 15 students took a quiz. The quiz scores where the following: 90, 81 88, 87, 86, 80, 80, 70,99, 100, 88, 78, 83,91, and 83. What was the mean score on the quiz? A. 87.5 ○B.” ° C. 85.6 O D. 84 小 0 Type here to search
Example: In a class of 3 students, the average score on the final exam is 75% and standard deviation of 5%. Amy got 80% on the final exam. How many standard deviations better than the mean is that? Mandy got 70%. How many standard deviations is Mandy's score deviate from the mean? Judy got 75%. How many standard deviation is Judy's score deviate from the mean?
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