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
Cloud [144]
3 years ago
7

Suppose you are told that a 95% confidence interval for the average price of a gallon of regular gasoline in your state is from

$3.05 to $3.92. Use the fact that the confidence interval for the mean is in the form x − E to x + E to compute the sample mean and the maximal margin of error E. (Round your answers to two decimal places.)
Mathematics
1 answer:
Cloud [144]3 years ago
8 0

Answer:

The sample mean is 3.48 and the margin of error is 0.44.

Step-by-step explanation:

We know that the confidence interval is written in the form "x − E to x + E", meaning x: sample mean or estimator, and E: margin of error.

To calculate the mean, we can calculate the average of both bounds of the confidence interval:

X=(UL-LL)/2=(3.92+3.05)/2=6.97/2=3.48

With one of the bounds, we can calculate the margin of error E

UL=X+E\\\\E=UL-X=3.92-3.48=0.44

You might be interested in
Samantha has a rectangular shaped fish tank in her room. The tank has a height of 2.6 ft, a width of 2.1 ft, and a length of 3.9
andrezito [222]

Answer: the BEST approximation of the amount of water her fish tank can hold is 21ft^3

Step-by-step explanation:

The shape of Samantha's fish tank is rectangular. The volume of the rectangular fish tank would be expressed as LWH

Where

L represents length of the tank

W represents the width of the tank.

H represents the height of the tank.

The tank has a height of 2.6 ft, a width of 2.1 ft, and a length of 3.9 ft.

This means that the volume of the fish tank would be

Volume = 2.6 × 2.1 × 3.9

= 21.294 ft^3

7 0
3 years ago
Plz help! I am so confused and we only just started learning this
nexus9112 [7]
Split the boxes into sections and then find the math that way.
5 0
3 years ago
The price of an item costs $13 to make. It is marked up $6.50 to sell. What is the percent marked-up
Whitepunk [10]

(1 + x) (13) = 13+6.5

13x + 13 = 19.5

13x = 6.5

x = 0.5

The item was marked up by 50%

4 0
3 years ago
What is the area of this face plz help!!!!
Alexxx [7]

Answer:

The image is blurry on my screen

Step-by-step explanation:

6 0
2 years ago
Read 2 more answers
What is 43.586 rounded to the nearest hundredth
USPshnik [31]
The answer is 43.590.
5 0
3 years ago
Read 2 more answers
Other questions:
  • So this has to do with permutations and honestly I need an explanation on how I can figure these out.
    11·1 answer
  • :) please answer question quick will give brainliest already did one answer
    11·1 answer
  • Find the nth term or this sequence 3 8 13 18 23
    9·2 answers
  • Suppose that 90% of all dialysis patients will survive for at least 5 years. In a simple random sample of 100 new dialysis patie
    9·1 answer
  • Which of the following polynomials has solutions that are not real numbers?
    9·1 answer
  • Colin invests £1200 into his bank account.
    8·2 answers
  • What is the slope of the line?
    8·2 answers
  • The cost of having t-shirts printed at two different shops is displayed below. Use the information provided to answer the follow
    9·1 answer
  • An artist mixes 25 ounce of blue paint with 115 ounce of green paint. Using the same ratio, how many ounces of green paint shoul
    5·1 answer
  • Find the measure of the indicated angle to the nearest
    11·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!