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
Triss [41]
3 years ago
9

A large jar contains a mixture of white and black beans. In a randomly chosen handful of 120 beans 40 were black. Create a 98% c

onfidence interval for the proportion of black beans in the jar. Express your answer to the nearest percent.
Mathematics
1 answer:
dusya [7]3 years ago
6 0

Answer:

23%<x<43%

Step-by-step explanation:

The formula for calculating confidence interval is expressed;

Confidence Interval = p ± z√p(1-p)/n

n is the sample size

z is the z score at 98% confidence interval

n is the sample size = 120

z =  2.33

If in a randomly chosen handful of 120 beans 40 were black, then;

p = 40/120

p = 4/12

p = 0.33

CI = 0.33± 2.33√0.33(1-0.33)/120

CI = 0.33± [2.33√0.33(0.67)/120]

CI =  0.33± [2.33√0.2211/120]

CI = 0.33± [2.33(0.04292)]

CI = 0.33±0.100014

CI = (0.33-0.100014, 0.33+0.100014)

CI = (0.229, 0.430014)

CI = (22.9, 43.0014)

Hence 98% confidence interval for the proportion of black beans in the jar is 23%<x<43%.

You might be interested in
Find the closing cost, to the nearest cent: house value of $89,548, two points, attorney's fees $324, title fees $105.
BlackZzzverrR [31]
89.548 + 324 + 105
= 89,548 + 429
=  89, 977 dollars
7 0
3 years ago
Read 2 more answers
The figure shows two parallel lines PQ and ST cut by the transversals PT and QS.
wariber [46]


answer is 

<span>Triangle PQR is similar to triangle TSR because measure of angle 3 equals measure of angle 4 and measure of angle 1 equals measure of angle 5</span>
3 0
3 years ago
Read 2 more answers
What is the equation of the line that passes through the point (2,0) and has a slope<br> of 5/2
andrezito [222]

Answer:

y = 5/2x - 5

Step-by-step explanation:

Please let me know if you want me to add an explanation as to why this is the answer/how I got this answer. I can definitely do that, I just wouldn’t want to write it if you don’t want me to :)

3 0
3 years ago
Q1- Write 46 821 correct to the nearest 100
noname [10]

Answer:

46800

Step-by-step explanation:

46821 nearest 100s

look for the tens it is less than 5 so its 800 and the numbers written before the 100s would remain the same

8 0
3 years ago
A man is standing next to a tree. The shadow cast by the tree is four times longer than the man’s shadow. If the man is 2 meters
gogolik [260]

Answer:

I think the tall of the tree is eight meters

3 0
2 years ago
Other questions:
  • Solve sin4x cosx-sinx cos4x = sqrt(2)/2 for [0, 2pi)
    6·1 answer
  • Please help me its just a problem with shaded areas and all i want is the answer but you can show the work if u want 2 plz also
    11·1 answer
  • Write a word problem that you can solve by multiplying a mixed number by a whole number. Include a solution.
    8·2 answers
  • How do i check 11z-5=9z+7
    7·2 answers
  • 1.2 = m - 2.5 m=? <br> What would be the answer?
    15·1 answer
  • If the following system of equations was written as a matrix equation in the form AX = C, and matrix A was expressed in the form
    6·1 answer
  • Use the Distributive Property to determine which of the following statements is equivalent to 5(6 – 2).
    5·1 answer
  • The sales tax on a $350 computer is $22.75. find the sales tax rate
    15·1 answer
  • Given: Q = 7m + 3n, R = 11 - 2m, S = n + 5, and T = -m - 3n + 8.
    8·2 answers
  • A large pizza at a restaurant has the dimensions shown. Find the area of the pizza. Use4 for T. 14 in. 22 Why does it make sense
    15·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!