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Question 3 A study of college freshmen's study habits found that the time (in hours) that...
2 4. In the study of the wide ranges in the academic success of college freshmen,...
2 4. In the study of the wide ranges in the academic success of college freshmen, one obvious factor is the amount of time spent studying. At the 0.05 significance level, test the claim that the standard deviation is more than 4.75 hours. The sample consists of 20 randomly selected freshmen who have a standard deviation of 6.25 hours.
To study the eating habits of students at a local college
1. To study the eating habits of students at a local college, thirty randomly selected students were surveyed to determine the number of times they had purchased food at the school cafeteria during the last week. The following results were obtained (a) Organize the given data by creating a frequency distribution3. The frequency distribution shown in the following table lists the number of hours per day a randomly selected sample of teenagers spent watching television. Where possible, determine what percent of...
The Survey of Study Habits and Attitudes (SSHA) is a psychological test that measures the...
The Survey of Study Habits and Attitudes (SSHA) is a psychological test that measures the motivation, attitude, and study habits of college students. Scores range from0 to 200 and follow (approximately) a Normal distribution with mean 113 and standard deviation 16. You suspect that incoming freshmen at your school have a mean m thatis different from 113 because they are often excited yet anxious about entering college. You give the SSHA to 23 incoming freshmen and find their mean score...
now much do you study? A survey among freshmen at a certain university revealed that the number of hours spent stud...
now much do you study? A survey among freshmen at a certain university revealed that the number of hours spent studying the week before final exams was normally distributed with mean 23 and standard deviation 9. Use the TI-84 PLUS calculator to answer the following. Round the answers to at least two decimal places. (a) Find the 94 percentile of the number of hours studying. (b) Find the 29 percentile of the number of hours studying. (c) Between what two...
How much do you study? A survey among freshmen at a certain university revealed that the...
How much do you study? A survey among freshmen at a certain university revealed that the number of hours spent studying the week before final exams was normally distributed with mean 26 and standard deviation 6. Use the Cumulative Normal Distribution Table to answer the following. (a) Find the 97" percentile of the number of hours studying. (b) Find the 32" percentile of the number of hours studying. (c) Between what two values are the middle 84% of the hours...
a , b , and c THANK YOU !!!!! How much do you study? A survey...
a , b , and c THANK YOU !!!!!
How much do you study? A survey among freshmen at a certain university revealed that the number of hours spent studying the week before final exams was normally distributed with mean 29 and standard deviation 9. Use the TI-84 PLUS calculator to answer the following. Round the answer to at least four decimal places. (a) What proportion of students studied more than 40 hours? (b) What is the probability that a...
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...
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=553.3 and standard deviation σ=28.6.Round z-scores to 2 decimal places and give probabilities to 4 decimal places. (a) What is the probability that a single student randomly chosen from all those taking the test scores 558 or higher? ANSWER: For parts (b) through (d), consider a simple random sample (SRS) of 30 students who took the test. (b) What...
Researchers doing a study comparing time spent on social media and time spent on studying randomly...
Researchers doing a study comparing time spent on social media and time spent on studying randomly sampled 200 students at a major university. They found that students in the sample spent an average of 2.3 hours per day on social media and an average of 1.8 hours per day on studying. If all the students at the university in fact spent 2.2 hours per day on studying, with a standard deviation of 2 hours, the shape of the sampling distribution...
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 ?=537μ=537 and standard deviation ?=27.5σ=27.5. (a) What is the probability that a single student randomly chosen from all those taking the test scores 542 or higher? ANSWER: For parts (b) through (d), consider a simple random sample (SRS) of 25 students who took the test. (b) What are the mean and standard deviation of the sample mean score ?¯x¯,...
2 4. In the study of the wide ranges in the academic success of college freshmen, one obvious factor is the amount of time spent studying. At the 0.05 significance level, test the claim that the standard deviation is more than 4.75 hours. The sample consists of 20 randomly selected freshmen who have a standard deviation of 6.25 hours.
now much do you study? A survey among freshmen at a certain university revealed that the number of hours spent studying the week before final exams was normally distributed with mean 23 and standard deviation 9. Use the TI-84 PLUS calculator to answer the following. Round the answers to at least two decimal places. (a) Find the 94 percentile of the number of hours studying. (b) Find the 29 percentile of the number of hours studying. (c) Between what two...
How much do you study? A survey among freshmen at a certain university revealed that the number of hours spent studying the week before final exams was normally distributed with mean 26 and standard deviation 6. Use the Cumulative Normal Distribution Table to answer the following. (a) Find the 97" percentile of the number of hours studying. (b) Find the 32" percentile of the number of hours studying. (c) Between what two values are the middle 84% of the hours...
a , b , and c THANK YOU !!!!!
How much do you study? A survey among freshmen at a certain university revealed that the number of hours spent studying the week before final exams was normally distributed with mean 29 and standard deviation 9. Use the TI-84 PLUS calculator to answer the following. Round the answer to at least four decimal places. (a) What proportion of students studied more than 40 hours? (b) What is the probability that a...
Researchers doing a study comparing time spent on social media and time spent on studying randomly sampled 200 students at a major university. They found that students in the sample spent an average of 2.3 hours per day on social media and an average of 1.8 hours per day on studying. If all the students at the university in fact spent 2.2 hours per day on studying, with a standard deviation of 2 hours, the shape of the sampling distribution...
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