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
gogolik [260]
3 years ago
11

The operations manager of a large production plant would like to estimate the mean amount of time a worker takes to assemble a n

ew electronic component. Assume that the standard deviation of this assembly time is 3.75 minutes.a. After observing 150 workers assembling similar devices, the manager noticed that their average time was 16.2 minutes. Construct a 95% confidence interval for the mean assembly time.
Mathematics
1 answer:
xz_007 [3.2K]3 years ago
5 0

Answer:

(15,595, 16,805)

Step-by-step explanation:

We have to:

m = 16.2, sd = 3.75, n = 150

m is the mean, sd is the standard deviation and n is the sample size.

the degree of freedom would be:

n - 1 = 150 - 1 = 149

df = 149

at 95% confidence level the t is:

alpha = 1 - 95% = 1 - 0.95 = 0.05

alpha / 2 = 0.05 / 2 = 0.025

now well for t alpha / 2 (0.025) and df (149) = t = 1,976

the margin of error = E = t * sd / (n ^ (1/2))

replacing:

E = 1,976 * 3.75 / (150 ^ (1/2))

E = 0.605

The 95% confidence interval estimate of the popilation mean is:

m - E <u <m + E

16.2 - 0.605 <u <16.2 + 0.605

15,595 <u <16,805

(15,595, 16,805)

You might be interested in
Please help! Especially with the steps!
wolverine [178]

Answer:a)680cu.ft

b)180cu.ft

Hope this helped you...

Step-by-step explanation:


8 0
3 years ago
Two ways to do a number line
lana66690 [7]
You can use a number line to add and subtract 
8 0
2 years ago
Distance, Midpoint, Circles - What is the equation of the circle? WILL GIVE BRAINLIEST!
elixir [45]

Answer:

(x-4)^2 + (y-3)^2 =8

Step-by-step explanation:

The midpoint of the diameter is (6+2)/2= 4, (5+1)/2 = 3

(4,3)

The radius is the distance from the midpoint to an endpoint

This is 2sqrt(8)

So the equation is

(x-4)^2 + (y-3)^2 =8

5 0
3 years ago
Write 7/3,41/9,9/5 in simplest form
Soloha48 [4]

Answer:

  • \frac{7}{3} = 2 1/3 ← Mixed Fraction
  • \frac{41}{9} = 4 5/9
  • \frac{9}{5} = 1 4/5

* Hopefully this helps:) Mark me the brainliest:)

8 0
2 years ago
Read 2 more answers
In circle F, arc AD = 80 and arc BC = 120.
Tom [10]

The answer is B, 100

8 0
3 years ago
Other questions:
  • Two friends start a business. Together they spent 800 dollars for their initial inventory. They will sell all of their initial i
    9·1 answer
  • Can Someone please help me?
    12·1 answer
  • At each stop, you get a snack. Stop 1 you spent a total of $12.50 and gave the cashier $15. How much change did you receive back
    6·2 answers
  •  What are the numbers from least to greatest 6,0,-9,-4.2
    15·1 answer
  • Round to the place value of the less precise measurement. <br> 2.13 m + 8.6 m
    9·1 answer
  • What is the quotient of 14 - (-5)<br><br> Please show ALL work
    13·1 answer
  • I need helppppppppp!!!!
    5·1 answer
  • Enter an equation for the function that includes the points.Give your answer in a(b)x. In the event that a=1 , give your answer
    7·1 answer
  • What is -3 3/8 - 7/8 ????
    9·2 answers
  • Use each table to find the requested ratio.
    12·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!