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
vitfil [10]
3 years ago
8

A study is conducted to determine how long a person will wait on hold on a telephone call before hanging up. A sample of 1000 pe

ople found that 580 hung up the phone in the first minute of waiting. It is of interest to estimate a range of plausible values for the true proportion of people that will not wait more than one minute on hold. Round all answers to three decimal places.
Mathematics
1 answer:
klasskru [66]3 years ago
4 0

Answer:

The estimate of a range of plausible values for the true proportion of people that will not wait more than one minute on hold at a 95% confidence level is

Confidence interval = (549.404, 610.596)

Step-by-step explanation:

We will be finding the confidence interval at 95% confidence level.

The proportion of people that hang up the phone in the first minute of waiting

= P = (580/1000) = 0.58

We can then calculate the standard deviation of the distribution of sample means = σₓ = √[np(1-p)]

where n = sample size = 1000

σₓ = √[np(1-p)] = √[1000×0.58×0.42] = 15.61

Confidence interval = (Sample mean) ± (Margin of error)

Sample mean = 580

Margin of Error = (critical value) × (standard deviation of the distribution of sample means)

Critical value = 1.960

Even though we do not have information on the population mean and standard deviation, we can use the z-distribution's z-score for 95% confidence interval instead of the t-distribution's t-score since the sample size is 1000.

Margin of error = 1.960 × 15.61 = 30.596

Confidence interval = (Sample mean) ± (Margin of error)

Confidence interval = 580 ± 30.596

Confidence interval = (549.404, 610.596)

Hope this Helps!!!

You might be interested in
A Toffee costs 15% more than a mint costs & 80. What is the price of a Toffee​
Anestetic [448]

Answer:

the price of Toffee is 92

Step-by-step explanation:

first we have to find 15% of 80 which is

15/100 × 80= 12 than we add it with 80 because the toffee is 15% more than a mint and therefore we get 80+12=92

7 0
3 years ago
What are the x and y of y=3x-7 y=2x-5​
stiv31 [10]

Answer:

x=2 and y=-1

Step-by-step explanation:

set equations equal

5 0
3 years ago
What is the area of this figure? Enter your answer in the box.​
GaryK [48]

Answer:

add area of p' gram and ️.

(20 x 16) + ( .5 x 20 x 8)

7 0
3 years ago
Identify the angle of depression.<br> 3<br> 6<br> 4<br> 5
dsp73

Answer: Angle 4

Step-by-step explanation:

The angle of depression is formed by the line of sight and the horizontal line tangent to the top of the observer.

5 0
2 years ago
The product of the slopes of perpendicular lines is -1. Which function represents a line that is perpendicular to y = -6x + 7
Svetllana [295]
Y= 1/6 x + 7. To find a line that is perpendicular just take the slope and find the negative reciprocal. ex. A/B becomes -B/A. Hope this helped
4 0
3 years ago
Other questions:
  • Use the given triangles to evaluate the expression. Rationalize all denominators. <br> cos Pi/6
    11·1 answer
  • Put 20/25 into lowest terms
    12·2 answers
  • Roger is training for the upcoming track season and records the number of miles that he runs each day for 20 days: 2.5, 0.5, 3.5
    13·1 answer
  • Y=x-3 asp need it willl make brainless
    6·1 answer
  • A house owner wishes to cover their roof with solar panels. Each solar panel is of the following size. The roof section is recta
    7·2 answers
  • PLS HELP!!look at image!!
    9·1 answer
  • Which equation is represented by the graph below?
    15·1 answer
  • Random questions
    12·1 answer
  • A survey of the whole United States shows that 75% of 6th grade students like sports that involve running, that 60% of boys like
    14·1 answer
  • Given an expression such as 3x + 2y, find the value of the expression when x is equal to 4 and y is equal to 2.4 Given an expres
    9·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!