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
STALIN [3.7K]
2 years ago
13

Allen's hummingbird (Selasphorus sasin) has been studied by zoologist Bill Alther.† Suppose a small group of 20 Allen's hummingb

irds has been under study in Arizona. The average weight for these birds is x = 3.15 grams. Based on previous studies, we can assume that the weights of Allen's hummingbirds have a normal distribution, with = 0.34 gram.
(a) Find an 80% confidence interval for the average weights of Allen's hummingbirds in the study region. What is the margin of error? (Round your answers to two decimal places.)
lower limit=
upper limit =
margin of error =

(b) What conditions are necessary for your calculations? (Select all that apply.)
a.uniform distribution of weights
b.normal distribution of weights
c.n is large
d. is unknown
e. is known


(c) Interpret your results in the context of this problem.
a. We are 80% confident that the true average weight of Allen's hummingbirds falls within this interval.
b.The probability that this interval contains the true average weight of Allen's hummingbirds is 0.80.
c.We are 20% confident that the true average weight of Allen's hummingbirds falls within this interval.
d.The probability that this interval contains the true average weight of Allen's hummingbirds is 0.20.

(d) Find the sample size necessary for an 80% confidence level with a maximal margin of error E = 0.12 for the mean weights of the hummingbirds. (Round up to the nearest whole number.)
________ hummingbirds
Mathematics
1 answer:
mixas84 [53]2 years ago
4 0
This is 5 point higher the points and maybe people will do it looks like a lot
You might be interested in
The variable z varies jointly with x and y and inversely with v and w. Using the constant of variation,k, from the last problem,
antiseptic1488 [7]

Answer:

Step-by-step explanation:

5 0
3 years ago
What is the simplest form of 8/40?
ehidna [41]
1/5 is the Simples Form
5 0
3 years ago
Read 2 more answers
Find c.
Mazyrski [523]

Answer:

: c2 = a2 + b2 - 2ab cos C

c²=20²+15²-2×15×20×cos50

c²=400+225-600×0.64

c²=241

c=√241=15.5ft

7 0
2 years ago
How do you Calculate the volume of each cylinder
DiKsa [7]

Volume= π·R²·H

π is Pi, approximately 3.142

R is the radius of the circular end of the cylinder

H is height of the cylinder

8 0
2 years ago
Read 2 more answers
What is the volume of the cylinder? Round to the nearest 10th.
nata0808 [166]

Answer:169.7

Step-by-step explanation:

To find the volume of a cylinder you can use the math formula πr^2H where r is the radius and H is the height. If you plug in the values you get π3^2(6) simplify 3^2 to get (9π)(6), you can multiply 9 by 6 to get 54 then multiply that by 3.1415 to get 169.65 which rounds to 169.7

6 0
3 years ago
Other questions:
  • Which number line expression shows how to find the distance from 2 to -5?​
    14·1 answer
  • Determine whether a tangent is shown in the diagram, Yes or No?
    9·1 answer
  • Lala went to the store to buy snacks for her grandmother. She bought 1.4 pounds of cashews that costs $8.90 per pound. She also
    7·2 answers
  • at a school carnival Jasmine paid $5 for admission and $1.25 per ride rain algebraic expression to represent the total amount Ja
    10·1 answer
  • Can someone please tell me answerrrrrrr
    5·2 answers
  • Refer to the equation x - 5y = 20.
    11·1 answer
  • |3x-11|=x+3<br> Write both solutions as equations on the same line separated by a comma.
    11·1 answer
  • Graph y=1 - x2 and y= ex on the same set of coordinate axes. Use the graph to find the positive solution of the
    8·1 answer
  • How many times greater is one gallon than one quart. PLS MY BRAIN IS ABOUT TO EXPLODE IM TO TIRED FOR PRACTICE.
    7·2 answers
  • A baker bakes 48 dozen doughnuts each morning. She sells 18 dozen
    6·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!