Question

A professor finds that for 16 randomly selected students the time needed to complete an assignment...

  1. A professor finds that for 16 randomly selected students the time needed to complete an assignment had a sample mean of 66 minutes and a sample standard deviation of 40 minutes. If the time needed to complete the assignment is normally distributed, then the standard error of the mean is

    a.

    5

    b.

    20

    c.

    16

    d.

    10

0 0
Add a comment Improve this question Transcribed image text
Know the answer?
Add Answer to:
A professor finds that for 16 randomly selected students the time needed to complete an assignment...
Your Answer:

Post as a guest

Your Name:

What's your source?

Earn Coins

Coins can be redeemed for fabulous gifts.

Not the answer you're looking for? Ask your own homework help question. Our experts will answer your question WITHIN MINUTES for Free.
Similar Homework Help Questions
  • A professor finds that for 9 randomly selected students the time needed to complete an assignment...

    A professor finds that for 9 randomly selected students the time needed to complete an assignment had a sample mean of 60 minutes and a sample standard deviation of 18 minutes. The 98% confidence interval estimate for the population mean is: a. 50.99 - 77.01 b. 42.62 - 77.38 c. 59.00 - 69.00 d. 41.37 - 65.63 QUESTION 26 After estimating the interval in the previous question, we can interpret it as: a. We are 98% confident that the true...

  • QUESTION 21 If we change a 90% confidence interval estimate to a 99% confidence interval estimate...

    QUESTION 21 If we change a 90% confidence interval estimate to a 99% confidence interval estimate while holding sample size constant, we can expect a. the width of the confidence interval to increase. b. the width of the confidence interval to decrease. c. the width of the confidence interval to remain the same. d. the sample size to increase. QUESTION 22 Which one of the following is a correct statement about the probability distribution of a t random variable? a....

  • The average time it takes a group of students to complete a certain assignment is 36...

    The average time it takes a group of students to complete a certain assignment is 36 minutes. The standard deviation is 4 minutes. Assume the variable is normally distributed. Now find the probability that if a group of 9 randomly selected students complete the assignment, the mean time it takes the group will complete the assignment in less than 33 minutes. Include drawings in your work. Use Traditional Method for hypothesis testing unless specified otherwise. Use correct rounding rule for...

  • A professor records the time (in minutes) that it takes 16 students to complete an exam....

    A professor records the time (in minutes) that it takes 16 students to complete an exam. Compute the SS, the variance, and the standard deviation assuming the 16 students constitute a population and assuming the 16 students constitute a sample. (Round your answers for variance and standard deviation to two decimal places.) 23 44 42 29 41 20 25 43 40 52 39 36 50 25 14 33

  • A professor records the time (in minutes) that it takes 16 students to complete an exam....

    A professor records the time (in minutes) that it takes 16 students to complete an exam. Compute the SS, the variance, and the standard deviation assuming the 16 students constitute a population and assuming the 16 students constitute a sample. (Round your answers for variance and standard deviation to two decimal places.) 50 51 39 41 29 33 48 21 14 25 24 38 27 40 44 32

  • The time it takes a randomly selected rat to complete a maze is normally distributed with...

    The time it takes a randomly selected rat to complete a maze is normally distributed with mean 1.5 minutes and standard deviation 0.35 minutes. (a) Find the probability that a randomly selected rat spends longer than 1.6 minutes to complete it. (b) We randomly take a sample of 100 rats. Find the probability that the average completion time for the sampled rats is smaller than 1.6 minutes. (c) We randomly take a sample of 4 rats. Find the probability that...

  • Prof. records the time in minutes does it take 16 students to complete an exam. Compute...

    Prof. records the time in minutes does it take 16 students to complete an exam. Compute the SS, the variance, and standard deviation assuming the 16 students constitute a population and assuming the 16 students constitute a sample. Round your answers for variance and standard deviation to two decimal places 39 50 14 36 25 21 56 29 33 23 44 42 41 43 40 20 9. + 0.15/1 points Previous Answers PriviteraStats3 4.E.029. My Notes Ask Your Teacher A...

  • The grade point averages​ (GPA) for 12 randomly selected college students are shown on the right....

    The grade point averages​ (GPA) for 12 randomly selected college students are shown on the right. Complete parts​ (a) through​ (c) below. Assume the population is normally distributed. 2.1, 3.1, 2.6, 1.5, 0.6, 4.0, 2.1, 1.1, 3.6, 0.5, 2.1, 3.4 construct a 90% confidence interval for the population mean The grade point averages (GPA) for 12 randomly selected college students are shown on the right. Complete parts (a) through (c) 2.1 below. 1.5 Assume the population is normally distributed. 2.1...

  • Name: 1. The time required for a citizen to complete the 2000 U.S. Census "long" form...

    Name: 1. The time required for a citizen to complete the 2000 U.S. Census "long" form is normally distributed with a mean of 40 minutes and a standard deviation of 10 minutes. What proportion of the citizens will require less than one hour to complete the census? 2. The time required for a citizen to complete the 2000 U.S. Census "long" form is normally distributed with a mean of 40 minutes and a standard deviation of 10 minutes. The slowest...

  • The time needed for college students to complete a certain paper-and-pencil maze follows a normal distribution...

    The time needed for college students to complete a certain paper-and-pencil maze follows a normal distribution with a mean of µ = 30 seconds and a standard deviation of σ = 3 seconds.   Nine randomly selected college students complete the maze.   The sampling distribution of the sample mean X it takes the sampled students to complete the maze is A. normal with mean 30 and standard deviation 3. B. normal with mean 30 and standard deviation 1. C. negatively skewed...

ADVERTISEMENT
Free Homework Help App
Download From Google Play
Scan Your Homework
to Get Instant Free Answers
Need Online Homework Help?
Ask a Question
Get Answers For Free
Most questions answered within 3 hours.
ADVERTISEMENT
ADVERTISEMENT
ADVERTISEMENT