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
sweet-ann [11.9K]
2 years ago
6

Thirty percent of a magazine's subscribers are female. A random sample of 50 subscribers Answer the following questions using Ex

cel: (using standart devision of 0.0648)
a. What is the probability that the proportion of females from this sample is at most 0.25
b. What is the probability that the proportion of females from this sample is between 0.22 and 0.28
c. What is the probability that the proportion of females from this sample is within 0.03 of the population proportion?
Computers and Technology
1 answer:
Ann [662]2 years ago
8 0

Based on the mean of the subscribers, the sample size, and the standard deviation, the probability of females being at most 0.25 is 0.2202.

The probability that they are between 0.22 and 0.28 is 0.2703.

The probability that they are within 0.03 of the population proportion is 0.3566.

<h3>What is the probability that they are at most 0.25?</h3>

Using Excel, we shall assume that the distribution is normally distributed.

We can therefore use the NORM.DIST function:


=NORM.DIST(0.25,0.3,0.0648,TRUE)

= 0.2202

<h3 /><h3>What is the probability that they are between 0.22 and 0.28?</h3>

=NORM.DIST(0.28,0.3,0.0648,TRUE) - NORM.DIST(0.22,0.3,0.0648,TRUE)

= 0.2703

<h3>What is the probability that they are within 0.03 of the population proportion?</h3>

X high = 0.30 + 0.03

= 0.33

X low = 0.30 - 0.03

= 0.27

= NORM.DIST(0.33,0.3,0.0648,TRUE) - NORM.DIST(0.27,0.3,0.0648,TRUE)

= 0.3566.

Find out more on probability at brainly.com/question/1846009.

You might be interested in
Write a telephone lookup program. Read a data set of 1,000 names and telephone numbers from a file that contains the numbers in
morpeh [17]

Answer:

See explaination

Explanation:

PhoneLookup.java

import java.io.FileReader;

import java.io.IOException;

import java.util.Scanner;

public class PhoneLookup

{

public static void main(String[] args) throws IOException

{

Scanner in = new Scanner(System.in);

System.out.println("Enter the name of the phonebook file: ");

String fileName = in.nextLine();

LookupTable table = new LookupTable();

FileReader reader = new FileReader(fileName);

table.read(new Scanner(reader));

boolean more = true;

while (more)

{

System.out.println("Lookup N)ame, P)hone number, Q)uit?");

String cmd = in.nextLine();

if (cmd.equalsIgnoreCase("Q"))

more = false;

else if (cmd.equalsIgnoreCase("N"))

{

System.out.println("Enter name:");

String n = in.nextLine();

System.out.println("Phone number: " + table.lookup(n));

}

else if (cmd.equalsIgnoreCase("P"))

{

System.out.println("Enter phone number:");

String n = in.nextLine();

System.out.println("Name: " + table.reverseLookup(n));

}

}

}

}

LookupTable.java

import java.util.ArrayList;

import java.util.Collections;

import java.util.Scanner;

/**

A table for lookups and reverse lookups

*/

public class LookupTable

{

private ArrayList<Item> people;

/**

Constructs a LookupTable object.

*/

public LookupTable()

{

people = new ArrayList<Item>();

}

/**

Reads key/value pairs.

atparam in the scanner for reading the input

*/

public void read(Scanner in)

{

while(in.hasNext()){

String name = in.nextLine();

String number = in.nextLine();

people.add(new Item(name, number));

}

}

/**

Looks up an item in the table.

atparam k the key to find

atreturn the value with the given key, or null if no

such item was found.

*/

public String lookup(String k)

{

String output = null;

for(Item item: people){

if(k.equals(item.getName())){

output = item.getNumber();

}

}

return output;

}

/**

Looks up an item in the table.

atparam v the value to find

atreturn the key with the given value, or null if no

such item was found.

*/

public String reverseLookup(String v)

{

String output = null;

for(Item item: people){

if(v.equals(item.getNumber())){

output = item.getName();

}

}

return output;

}

}

Item.java

public class Item {

private String name, number;

public Item(String aName, String aNumber){

name = aName;

number = aNumber;

}

public String getName(){

return name;

}

public String getNumber(){

return number;

}

}

input.txt

Abbott, Amy

408-924-1669

Abeyta, Ric

408-924-2185

Abrams, Arthur

408-924-6120

Abriam-Yago, Kathy

408-924-3159

Accardo, Dan

408-924-2236

Acevedo, Elvira

408-924-5200

Acevedo, Gloria

408-924-6556

Achtenhagen, Stephen

408-924-3522

Note: Replace all the "at" with at symbol

4 0
3 years ago
Im lonellly whos down to date me
inna [77]

Answer:

I was actually just looking to help with someone's schoolwork. . .

Explanation:

5 0
2 years ago
Read 2 more answers
1. what is the purpose of giving an id to an html element when using javascript?
bazaltina [42]

Answer:

It is also used by JavaScript to access and manipulate the element with the specific id.

3 0
2 years ago
________ is a method for addressing, creating, updating, or querying relational databases.
lorasvet [3.4K]
Structured Query Language<span> (</span>SQL<span>)</span>
4 0
3 years ago
So wait how do i comment on someone's answer because that would be useful ,,.
LuckyWell [14K]

Answer:

Type right under my comment

Explanation:

Look in comments

5 0
3 years ago
Read 2 more answers
Other questions:
  • What makes Group Policy such a powerful tool is its ability to enable security administrators to:_________.
    8·1 answer
  • How to copy single slide to powerpoint
    15·1 answer
  • In one to two sentences, explain why citizens pay taxes
    8·1 answer
  • You need to subnet a network that has 5 subnets, each with at least 16 hosts. Which classful subnet mask would you use?A. 255.25
    12·1 answer
  • Which of the following best describes the basic purpose of the internet?
    11·1 answer
  • Select the correct word to complete the sentence.
    8·1 answer
  • Qr code is more developed than barcode​
    11·1 answer
  • If a work is in the public domain… Group of answer choices its copyright has expired. it may not be used for commercial purposes
    9·1 answer
  • What's the smallest part of a computer
    8·2 answers
  • Damion recently did an update to his computer and added a new video card. After the update, Damion decided that he would like to
    14·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!