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
Taya2010 [7]
3 years ago
10

Boxes of raisins are labled as containing 22 ounces. Following are the weights, in the ounces, of a sample of 12 boxes. It is re

asonable to assume that the population is approximatly normal.
21.88 21.76 22.14 21.63 21.81 22.12 21.97 21.57 21.75 21.96 22.20 21.80

Required:
Construct a 99% confidence interval for the mean weight.
Mathematics
1 answer:
kati45 [8]3 years ago
5 0

Answer:

The 99 % confidence interval on the basis of mean is ( 21.7393  ;   22.0257)

Step-by-step explanation:

Mean = Sum of observations / Number of observations

Mean = 21.88 +21.76 +22.14 +21.63+ 21.81 +22.12+ 21.97+ 21.57+ 21.75+ 21.96 +22.20 +21.80/ 12

Mean =x`= 262.59/12=  21.8825

Standard Deviation = s= ∑x²/n - ( ∑x/n)²

∑x²/n= 478.7344 +473.4976 + 490.1796+467.8569+ 475.6761 + 489.2944+ 482.6809+ 465.2649+ 473.0625+ 482.2416 +492.84 + 475.24/ 12

∑x²/n= 5746.5689/12= 478.8807 = 478.881

Standard Deviation = s= ∑x²/n - ( ∑x/n)²

s= 478.881- (21.8825)²= 478.881-478.843= 0.037

The confidence limit 99% for the mean will be determined by

x` ± α(100-1) √s/n

Putting the values in the above equation

= 21.8825 ± 2.58 √0.037/12

Solving the square root

= 21.8825 ± 2.58 (0.05549)

Multiplying the square root with 2.58

=21.8825 ± 0.1432

Adding and subtracting would give

21.7393  ;   22.0257,

Hence the 99 % confidence interval on the basis of mean is ( 21.7393  ;   22.0257)

You might be interested in
Can someone please give me the answer to this
Nonamiya [84]

Hello!

\large\boxed{y = 2x - 4}

Slope-intercept form is y = mx + b where:

m = slope

b = y-intercept

Plug in the given values:

y = 2x - 4

7 0
2 years ago
The triangle pictured below represents a community garden, which is surrounded on
dsp73

Answer:

I'm not able to do it but I can tell you how

Step-by-step explanation:

make the 10a-9 equal 14a-25 solve for that a then use the answer to a to then plug in thst number in all of them and that would be your answer

3 0
2 years ago
Read 2 more answers
I still need help with similar question
KatRina [158]

Step-by-step explanation:

<u>Step 1:  Determine the axis of symmetry</u>

The axis of symmetry is middle of the parabola.  In this equation we see that at x = -1 we have the vertex and also the middle of the parabola.  So our axis of symmetry is x = -1.

<u>Step 2:  Determine the vertex</u>

The vertex is the minimum or maximum of a parabola and is bent in a crest form.  In this example the vertex is at (-1, -3) because we are using the tip of the graph.

<u>Step 3:  Determine the y-intercept</u>

The y-intercept is where the graph intersects with the y-axis.  In this example we intersect the y-axis at -4 so that means that our point would be (0, -4) meaning that we intersect x = 0 at -4.

<u>Step 4:  Determine if the vertex is a min or max</u>

Looking at the graph we can see that the rest of the red line is beneath the vertex point which means that the vertex is a max.

<u>Step 5:  Determine the domain</u>

The domain is the x-values that we are going to be using and we know that we are reaching toward positive and negative inifity which means that we are using all real numbers.

<u>Step 6:  Determine the range</u>

The range is the y axis and what y values we are able to reach using the graph.  In this example we can see that all y-values above -3 are not being used therefore the range is y \leq -3

3 0
2 years ago
What is the volume of a cube 1 1/2 inches wide 2 1/2 inches long and 4 inches high?
mel-nik [20]

Answer:

231

Step-by-step explanation:

first of all it must be a cuboid bcoz a cube's edge is same i.e length =breadth= height.

now volume of cuboid =lbh

11/2×21/2×4

=231

ans....

6 0
2 years ago
Read 2 more answers
Which of the following is the correct way to write seventy million as a numeral?
Inessa05 [86]
Which of the following is the correct way to write seventy million as a numeral?

As I see no choices the right way to write seventy million as a numeral is

70,000,000

Hope I helped!
3 0
3 years ago
Other questions:
  • The graph of a linear function is shown. A coordinate plane with a straight line passing through (negative 4, 2), (0, 0), and (4
    7·2 answers
  • A number n is 150% of number m. Is n greater than, less than, or equal to m? Explain your reasoning.
    13·1 answer
  • Please help quickly!!
    14·1 answer
  • Mr .Baker has baked some muffins. If he packs them in boxes of 4, he will have 3 left over. If he packs them in boxes of 5, he w
    10·1 answer
  • What is 5.8 x 10^6 seconds in minutes?
    15·1 answer
  • There are 40 students in a class, 12 girls and 28 boys. What is the probability of picking a girl out of the class and how likel
    13·1 answer
  • Can anyone help me with my last math test question pls my grades are depending on this test so pls help and get me the right ans
    6·2 answers
  • What is the value of 2x2 when x = 1.5?
    11·2 answers
  • HELP what’s the answer
    10·2 answers
  • Median weekly earnings for women with some college for an associate degree.
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!