View the step-by-step solution to:


I am failing quantitative reasoning. I'm trying to teach myself and I have no clue what I'm doing.



6:43 PM Sat Jan 25
Standard Deviation Is Not Known Quiz
Trey Rice is taking this assessment.
This assessment was assigned 0 points by Barry Weliver. Once taken, the actual score will be used instead.
1. A simple random sample has a sample size of n = 65. Given the population is normally distributed, find (1 point)
the critical value ta/2 corresponding to a 99% confidence level.
O 2.575
O 2.000
2. The standard deviation of sample size of n = 15 is 345 and the mean is 6784. Given that the population
(1 point)
follows a normal distribution, construct a 90% confidence interval estimate of the mean of the
O 6519 < M < 7049
O 6593 < M < 6975
6627 < M < 6941
O 6783 < M < 6785
3 . Ther
sample size n = 35 is 1860. The standard deviation of the sample is 102 and the population (1 point)

Top Answer

1. Given that, sample size (n) = 65 Degrees of freedom = 65 - 1 = 64... View the full answer

Sign up to view the full answer

Why Join Course Hero?

Course Hero has all the homework and study help you need to succeed! We’ve got course-specific notes, study guides, and practice tests along with expert tutors.

  • -

    Study Documents

    Find the best study resources around, tagged to your specific courses. Share your own to gain free Course Hero access.

    Browse Documents
  • -

    Question & Answers

    Get one-on-one homework help from our expert tutors—available online 24/7. Ask your own questions or browse existing Q&A threads. Satisfaction guaranteed!

    Ask a Question