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
max2010maxim [7]
3 years ago
13

Penny Weights, use the weights of the post 1983 pennies to construct a 98% confidence interval estimate of the standard deviatio

n of the weights of all post-1983 pennies. S=0.0165 n=37. Find confidence interval. a. 0.01231 < Ï < 0.2111 b. 0.01239 < Ï < 0.02111 c. 0.1391 < Ï < 0.2311 d. 0.001219 < Ï < 0.002111
Mathematics
1 answer:
Ronch [10]3 years ago
7 0

Answer:

c. 0.1391 < Ï < 0.2311

Step-by-step explanation:

The formula for Confidence Interval is given as:

Mean ± z × Standard deviation/√n

Z score for 98% confidence interval = 2.326

Mean = Significance level = 100% - 98%

= 2% = 0.02

Standard deviation = S=0.0165

n= 37

Hence,

Confidence Interval =

0.02 ± 2.326 × 0.0165/√37

0.02 ± 0.0063094687

Confidence Interval

0.02 - 0.0063094687

= 0.1391

0.02 ± 0.0063094687

= 0.2311

Hence, the Confidence Interval = (0.1391, 0.2311)

= c. 0.1391 < Ï < 0.2311

You might be interested in
If the height of a triangle is 12 and its area is 54, what is its base?
VMariaS [17]

Answer:

Q1:9


Step-by-step explanation:

Since the area of a triangle is basexheight divided by 2, than (12 x __)/2 = 54

3 0
2 years ago
What is the first step in solving this system of equations by elimination? 5a + 3b = –9 2a – 5b = –16
Elis [28]
<span>Multiply one of the equations so that both equations share a common complementary coefficient.
       In order to solve using the elimination method, you need to have a matching coefficient that will cancel out a variable when you add the equations together. For the 2 equations given, you have a huge number of choices. I'll just mention a few of them.
   You can multiply the 1st equation by -2/5 to allow cancelling the a term.
   You can multiply the 1st equation by 5/3 to allow cancelling the b term.
   You can multiply the 2nd equation by -2.5 to allow cancelling the a term. You can multiply the 2nd equation by 3/5 to allow cancelling the b term.
   You can even multiply both equations.
For instance, multiply the 1st equation by 5 and the second by 3. And in fact, let's do that. 5a + 3b = –9 2a – 5b = –16 5*(5a + 3b = -9) = 25a + 15b = -45
   3*(2a - 5b = -16) = 6a - 15b = -48
       Then add the equations 25a + 15b = -45
   6a - 15b = -48
   =
   31a = -93
   a = -3
       And then plug in the discovered value of a into one of the original equations and solve for b.</span>
5 0
3 years ago
Triangle A'B'C'is the result of reflecting triangle ABC across the line l
Hoochie [10]

9514 1404 393

Answer:

  b, c

Step-by-step explanation:

Reflection across a line is a "rigid" transformation, so linear measures and angle measures remain unchanged. (b and c are true statements)

Reflection across a line skew to the y-axis will mean that any segment originally perpendicular to the y-axis will not be after the reflection. ('a' is not a true statement)

6 0
2 years ago
Lon: f(x) = 2x2 + 1<br> The answer?
ZanzabumX [31]

Answer:

Step-by-step explanation:

then the answer is 5

8 0
3 years ago
Please give me the correct answer ​
ArbitrLikvidat [17]

Answer:

11

Step-by-step explanation:

Just count it

6 0
3 years ago
Read 2 more answers
Other questions:
  • I need help on what to do for part b
    7·1 answer
  • Ms Quon discovered that 40 students like soccer, 20 liked baseball, 10 liked football, and 5 liked swimming.
    13·1 answer
  • Haley bought 1.6 pounds of almonds for $13.20. How much did she pay per pound?
    9·1 answer
  • Kind of struggling, can anyone help?
    12·1 answer
  • Question 26 of 58
    5·1 answer
  • Seven - tenths of the votes for blue were made by girls. Did girls who voted for blue make up more than or less than half of all
    7·1 answer
  • Point A is located in which quadrant?<br> On a coordinate plane, point A is at (negative 3, 5).
    5·1 answer
  • Explain -2y+6=-12 thank u
    13·2 answers
  • A bag contains 8 purple marbles, 7 yellow marbles, 8 red marbles, and 3 blue marbles. What is the probability of drawing a purpl
    9·1 answer
  • Evaluate if a = 28 and b = -3. a over 4 + b =
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!