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
Kay [80]
3 years ago
13

In a destructive test of product quality, a briefcase manufacturer places each of a simple random sample of the day’s production

in a viselike device and measures how many pounds it takes to crush the case. From past experience, the standard deviation has been found to be 21.5pounds. For 35 cases randomly selected from today’s production, the average breaking strength was 341.0 pounds. The lower confidence limit of 99% confidence interval for the mean breaking strength of the briefcases produced today would equal to;
Mathematics
1 answer:
Pepsi [2]3 years ago
6 0

Answer:

The lower confidence limit of 99% confidence interval for the mean breaking strength of the briefcases produced today would be equal to 331.09 pounds.

Step-by-step explanation:

Lower limit of confidence interval = mean - Error margin (E)

mean = 341.0 pounds

sd = 21.5 pounds

n = 35

degree of freedom = n - 1 = 35 - 1 = 34

confidence level = 99%

t-value corresponding to 34 degrees of freedom and 99% confidence level is 2.728

E = t × sd/√n = 2.728 × 21.5/√35 = 9.91 pounds

Lower limit = 341.0 - 9.91 = 331.09 pounds

You might be interested in
1.F(3)=-3x+2<br> 2.f(0)=-3x+2<br> 3.f(-2)=-3x+2
Firlakuza [10]

Answer:

1) -3(3) + 2 = -7

2) -3(0) + 2 = 2

3) -3(-2) + 2 = 8

3 0
3 years ago
The choices are:
Harrizon [31]
Let's take a look at D:   

<span>D)    y = (x-1)^2 - 16     Compare this to 
        y = (x-h)^2 + k       This is the std. equation of a parabola in vertex form.

You can see, by comparison, that h=1 and k= -16; these are the coordinates of the vertex, clearly shown in the diagram.

Since the coefficient of (x-h)^2 is +1, the graph opens upward (which the given graph confirms), and is neither compressed nor stretched vertically.</span>
7 0
4 years ago
What is the product?
Gnoma [55]

The correct product of (6x - 2)(6 x + 2) is 36x^2 - 4

<h3>How to determine the product?</h3>

The expression is given as:

(6x - 2)(6 x + 2).

The above expression is a difference of two squares.

And this is represented as

(a - b)(a + b)= a^2 - b^2

So, we have

(6x - 2)(6 x + 2) = (6x)^2 - 2^2

Evaluate

(6x - 2)(6 x + 2) = 36x^2 - 4

Hence, the correct product of (6x - 2)(6 x + 2) is 36x^2 - 4

Read more about difference of two squares at:

brainly.com/question/3189867

#SPJ1

<u>Complete question</u>

What is the product?

(6x - 2)(6 x + 2).

6 0
2 years ago
Mujer culona
KIM [24]
Mujer culona mujer culona mujer culona
6 0
3 years ago
You are buying carpet to cover a room that measures 42 ft by 42 ft. The carpet cost $ 25 per square yard. How much will the carp
antiseptic1488 [7]

Ok so, 42 ft. by 42 ft.

$25 per square yard

1 square yard = 9 square feet

The total square footage is 1,764 ft.

Total square yards is 196.

The total cost would be $4,900.

3 0
2 years ago
Other questions:
  • What's the answer for this ?
    13·2 answers
  • What is the slope of the line passing through the points  (−3, 4) and (2, −1) ?
    15·2 answers
  • Write the riddle for the number 62
    14·2 answers
  • 78 students are separated into groups of eight for a field trip how many groups are there the remaining students form a smaller
    5·1 answer
  • 8. Complete the steps of the proof shown below.
    10·1 answer
  • 2
    6·2 answers
  • Donte used mental math to find the exact sum of 386 and 14. Which strategy could Donte have used?
    12·2 answers
  • Find the equation (in terms of x) of the line through the points ( − 1 , − 1 ) and( 4 , − 4 )
    14·1 answer
  • Pls answer this question plssss
    15·1 answer
  • HELLLP !!!!!!<br> What is the product
    15·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!