Question

In: Statistics and Probability

In a study of academic procrastination, the authors of a paper reported that for a sample...

In a study of academic procrastination, the authors of a paper reported that for a sample of 481 undergraduate students at a midsize public university preparing for a final exam in an introductory psychology course, the mean time spent studying for the exam was 7.54 hours and the standard deviation of study times was 3.80 hours. For purposes of this exercise, assume that it is reasonable to regard this sample as representative of students taking introductory psychology at this university.

(a) Construct a 95% confidence interval to estimate μ, the mean time spent studying for the final exam for students taking introductory psychology at this university. (Round your answers to three decimal places.)

(b) The paper also gave the following sample statistics for the percentage of study time that occurred in the 24 hours prior to the exam.

n = 481      x = 43.78      s = 21.46

Construct a 90% confidence interval for the mean percentage of study time that occurs in the 24 hours prior to the exam. (Round your answers to three decimal places.)

Solutions

Expert Solution


orchestra answered 2 years ago
Next > < Previous

Related Solutions

In a study of academic procrastination, the authors of a paper reported that for a sample...
In a study of academic procrastination, the authors of a paper reported that for a sample of 431 undergraduate students at a midsize public university preparing for a final exam in an introductory psychology course, the mean time spent studying for the exam was 7.24 hours and the standard deviation of study times was 3.50 hours. For purposes of this exercise, assume that it is reasonable to regard this sample as representative of students taking introductory psychology at this university....
In a study of academic procrastination, the authors of a paper reported that for a sample...
In a study of academic procrastination, the authors of a paper reported that for a sample of 411 undergraduate students at a midsize public university preparing for a final exam in an introductory psychology course, the mean time spent studying for the exam was 7.64 hours and the standard deviation of study times was 3.60 hours. For purposes of this exercise, assume that it is reasonable to regard this sample as representative of students taking introductory psychology at this university....
In a study of academic procrastination, the authors of a paper reported that for a sample...
In a study of academic procrastination, the authors of a paper reported that for a sample of 441 undergraduate students at a midsize public university preparing for a final exam in an introductory psychology course, the mean time spent studying for the exam was 7.74 hours and the standard deviation of study times was 3.40 hours. For purposes of this exercise, assume that it is reasonable to regard this sample as representative of students taking introductory psychology at this university....
The authors of a paper studied a random sample of 351 Twitter users. For each Twitter...
The authors of a paper studied a random sample of 351 Twitter users. For each Twitter user in the sample, the tweets sent during a particular time period were analyzed and the Twitter user was classified into one of the following categories based on the type of messages they usually sent. Category Description IS Information sharing OC Opinions and complaints RT Random thoughts ME Me now (what I am doing now) O Other The accompanying table gives the observed counts...
As per the academic scholars and authors, what are the 4 limitations that they found with...
As per the academic scholars and authors, what are the 4 limitations that they found with this CMD model?
If you were writing an academic paper, what topic would you choose to study and present...
If you were writing an academic paper, what topic would you choose to study and present and What is the most interesting academic writing you have read?
Authors Academic Press faces three potential contingency situations, described below
Authors Academic Press faces three potential contingency situations, described below. Authors’ fiscal year ends December 31, 2021.   Required: Determine the appropriate means of reporting each situation for the year ended December 31, 2021, and record any necessary entries. Explain your reasoning. 1. In August 2021, a worker was injured in an accident, partially as a result of his own negligence. The worker has sued the company for $1.2 million. Legal counsel believes it is reasonably possible that the outcome...
The academic paper by Martin, McNally, and Kay (2013) asserts that: Select one: Academic research on...
The academic paper by Martin, McNally, and Kay (2013) asserts that: Select one: Academic research on business start-ups does not help the aspiring entrepreneur. Academic research on business start-ups is useful for the aspiring entrepreneur. Ninety per cent of woman’s clothing stores fail within three years. None of the statements here are asserted by that academic paper.
The authors of a paper describe an experiment to evaluate the effect of using a cell...
The authors of a paper describe an experiment to evaluate the effect of using a cell phone on reaction time. Subjects were asked to perform a simulated driving task while talking on a cell phone. While performing this task, occasional red and green lights flashed on the computer screen. If a green light flashed, subjects were to continue driving, but if a red light flashed, subjects were to brake as quickly as possible. The reaction time (in msec) was recorded....
The authors of a paper describe an experiment to evaluate the effect of using a cell...
The authors of a paper describe an experiment to evaluate the effect of using a cell phone on reaction time. Subjects were asked to perform a simulated driving task while talking on a cell phone. While performing this task, occasional red and green lights flashed on the computer screen. If a green light flashed, subjects were to continue driving, but if a red light flashed, subjects were to brake as quickly as possible. The reaction time (in msec) was recorded....
ADVERTISEMENT
Subjects
ADVERTISEMENT
Latest Questions
ADVERTISEMENT