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
Naily [24]
3 years ago
13

Thompson and Thompson is a steel bolts manufacturing company. Their current steel bolts have a mean diameter of 144 millimeters,

and a variance of 49. If a random sample of 50 steel bolts is selected, what is the probability that the sample mean would differ from the population mean by more than 2.6 millimeters
Mathematics
1 answer:
valentinak56 [21]3 years ago
8 0

Answer:

The probability that the sample mean would differ from the population mean by more than 2.6 mm is 0.0043.

Step-by-step explanation:

According to the Central Limit Theorem if we have a population with mean μ and standard deviation σ and appropriately huge random samples (n > 30) are selected from the population with replacement, then the distribution of the sample  means will be approximately normally distributed.

Then, the mean of the distribution of sample mean is given by,

\mu_{\bar x}=\mu

And the standard deviation of the distribution of sample mean  is given by,

\sigma_{\bar x}=\frac{\sigma}{\sqrt{n}}

The information provided is:

<em>μ</em> = 144 mm

<em>σ</em> = 7 mm

<em>n</em> = 50.

Since <em>n</em> = 50 > 30, the Central limit theorem can be applied to approximate the sampling distribution of sample mean.

\bar X\sim N(\mu_{\bar x}=144, \sigma_{\bar x}^{2}=0.98)

Compute the probability that the sample mean would differ from the population mean by more than 2.6 mm as follows:

P(\bar X-\mu_{\bar x}>2.6)=P(\frac{\bar X-\mu_{\bar x}}{\sigma_{\bar x}} >\frac{2.6}{\sqrt{0.98}})

                           =P(Z>2.63)\\=1-P(Z

*Use a <em>z</em>-table for the probability.

Thus, the probability that the sample mean would differ from the population mean by more than 2.6 mm is 0.0043.

You might be interested in
Mya claims (m∠3 + m∠4) = m∠1
Lapatulllka [165]

Answer:

its answer b

Step-by-step explanation:

B:(m∠1 + m∠2) = 180° and (m∠3 + m∠4) = 180°

5 0
2 years ago
Find the area and perimeter of the shape above
ELEN [110]

Answer:

Perimeter: 18.5

Area: 15

Step-by-step explanation:

P = a + b + c

P = 5 + 6 + 7.5

P= 18.5

A = 1/2bh

A = 1/2*7.5*4

A= 15

5 0
3 years ago
Please help me! 15 pts! + Brainliest!
WITCHER [35]

Answer:

D

Step-by-step explanation:

It increased 3 meters every second if you look closely at chart

4 0
3 years ago
For the function f(x) = -(x + 1)2 + 4, identify the vertex, domain, and range.
Studentka2010 [4]

f ( x ) = - ( x + 1)^2 + 4

_____________________

Vertex = ( - 1 , 4 )

♡♡♡♡♡♡♡♡♡♡♡♡

Domain = R

♡♡♡♡♡♡♡♡♡♡♡♡

Range = ( - infinite , 4 ]

3 0
3 years ago
A sweater is 45.50 dollars. It's on sale for 20% off. What is the sale price of the sweater?
arlik [135]
<h3>Answer</h3>

Sale Price = $36.4

Step-by-step explanation:

Sale Price = $36.4 (answer). This means the cost of the item to you is $36.4. You will pay $36.4 for a item with original price of $45.50 when discounted 20%. In this example, if you buy an item at $45.50 with 20% discount, you will pay 45.50 - 9.1 = 36.4 dollars.

3 0
2 years ago
Other questions:
  • A cube has an edge length of 9 centimeters. If the side length is increased by a factor of 3, how much larger is the perimeter o
    15·2 answers
  • HELP FAST PLEASE BRAINLIEST FOR ANSWER
    14·1 answer
  • in a certain chemical the ratio of zinc to Cooper is 4 to 19 A jar of the chemical contains 760 grams of cooper how many grams o
    15·1 answer
  • How many sides does a regular heptagon have
    7·2 answers
  • Can someone plzzz show me how to solve this?
    7·1 answer
  • A regular triangular pyramid has a base area of 31.5 mm2
    5·1 answer
  • Find the area of the cylinder. 3cm 6cm
    5·1 answer
  • Four times the difference between x<br> and z
    6·1 answer
  • There is a box with 6 marbles: 3 red, 1 blue, 1 green, and 1 yellow. What is the probability of picking yellow marble, keep it,
    13·2 answers
  • If a student didn’t understand proportional relationships, how would you explain it to them?
    11·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!