1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
topjm [15]
3 years ago
11

Assume that the heights of bookcases are normally distributed. A random sample of 16 bookcases in one company have a mean height

of 67.5 inches and a standard deviation of 3.6 inches. Construct a 99% confidence interval for the population standard deviation, σ.
Mathematics
2 answers:
ipn [44]3 years ago
6 0

Answer: 1.1 and 3.1

Step-by-step explanation:

Aneli [31]3 years ago
3 0

Answer:  2.43

Step-by-step explanation:

Given :  Confidence level :1-\alpha=0.99

Significance level :\alpha=0.01

Sample size : n= 16

Sample standard deviation : s= 3.6 inches

Using chi-square distribution table , the critical values are:

\chi^2_{\alpha/2, n-1}=\chi^2_{0.005, 15}=32.80132065\\\\\chi^2_{1-\alpha/2, n-1}=\chi^2_{0.995, 15}=4.60091557

We know that , confidence interval for the population standard deviation is given by :-  

\sqrt{\dfrac{(n-1)s^2}{\chi^2_{\alpha/2, n-1}}}

Hence ,  a 99% confidence interval for the population standard deviation is 2.43.

You might be interested in
Next number in sequence 3 -6 12 4 20 ?
Artyom0805 [142]
-6 - 3 = -9
12 - (-6) = 18
4 - 12 = -8
20 - 4 = 16
The first difference is -9. The third difference is -8.
Maybe the fifth difference is -7.
That makes the next term 13.

<span>3, -6, 12, 4, 20, 13</span>
8 0
3 years ago
What is the range of the function y=2sin x
statuscvo [17]

take the absolute value of the coefficient (2)

 then the lower bound is the negative of that (-2)

so the range is [-2,2]


7 0
3 years ago
Read 2 more answers
I WILL GIVE BRAINLIEST :)
Triss [41]

Answer: I got 50x+$75 but I’m not too sure for the last step

Step-by-step explanation:

7 0
2 years ago
Read the following passage and answer the question.
olga2289 [7]

Answer:

The Correct answer is:

A. You aren’t telling me anything I don’t already know.

Step-by-step explanation:

4 0
3 years ago
1/2 + n = 0, 2/3 + n = 0 And explain
Zepler [3.9K]
So we can subsitute since they all equatl zero
1/2+n=0=2/3+n
1/2+n=2/3+n
subtract n from both sides
1/2=2/3
false statement
therefor there is no solution
4 0
3 years ago
Other questions:
  • In parallelogram ABCD , ∠A and ∠B are adjacent. The measure of ∠B is two times the measure of ∠A . Which equation gives the exac
    13·1 answer
  • the function of f(x) =x is vertically transulated 1 unit up and then reflected across the y- axis. Whats the new function of g (
    6·1 answer
  • A regression equation is obtained for a collection of paired data. It is found that the total variation is 20.711, the explained
    9·1 answer
  • researcher wishes to conduct a study of the color preferences of new car buyers. Suppose that 40% 40 % of this population prefer
    12·1 answer
  • Homework Progress
    6·2 answers
  • Find the product mentally.
    7·2 answers
  • Zach is 6 inches shorter than two times his cousin's height, c. How tall is Zach?
    9·1 answer
  • It is 10° at 4pm. The temperature drops
    12·1 answer
  • Will give brainliest!
    10·1 answer
  • Find the 20th term in the sequence, where the first term is -2 and the common ratio is-2.
    9·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!