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
Lisa [10]
3 years ago
11

1. Different students drew random samples of size 50 from the mystery bag. The number of red chips each drew is given below. In

each case, find the margin of error for the proportions
of the red chips in the mystery bag.
a. 10 red chips
b. 28 red chips
c. 40 red chips
Mathematics
1 answer:
denis-greek [22]3 years ago
4 0

Answer:

Part A:

Margin of error=M≅0.1131

Part B:

Margin of error=M≅0.1404

Part C:

Margin of error=M≅0.1131

Step-by-step explanation:

The formula for finding the margin of error for the proportion  is:

Margin of error=M=2*\sqrt{\frac{p(1-p)}{n} }

where:

p is the sample proportion =\frac{Number of Chips}{Samlpe Size}

n is the sample size

Part A:

Margin of error=M=2*\sqrt{\frac{p(1-p)}{n} }

p=\frac{10}{50}

p=0.2

Margin of error=M=2*\sqrt{\frac{0.2*(1-0.2)}{50}}

Margin of error=M≅0.1131

Part B:

p=\frac{28}{50}

p=0.56

Margin of error=M=2*\sqrt{\frac{0.56*(1-0.56)}{50}}

Margin of error=M≅0.1404

Part C:

p=\frac{40}{50}

p=0.8

Margin of error=M=2*\sqrt{\frac{0.8*(1-0.8)}{50}}

Margin of error=M≅0.1131

You might be interested in
The class is 60% women and 10% of the women have blond hair, so blond women comprise 60% × 10% = 6% of the class.
Tatiana [17]

Answer:

Conversion and substitution

Step-by-step explanation:

One way to find out if the expression is true, we can convert all the percentages into their decimal equivalence.

60% = 0.6

10% = 0.1

6% = 0.06

Now let's substitute the values.

0.06 = 0.6 x 0.1

0.06 = 0.06

Since 0.06 is equal 0.06, this then proves that it is true.

6 0
3 years ago
55.04 is what percent of 21.5
Nikolay [14]
55.04 is 256% of 21.5 
Hope it helps and hope its right...---
4 0
3 years ago
Read 2 more answers
Phyllis invested 50000 dollars, a portion earning a simple interest rate of 5 percent per year and the rest earning a rate of 7
Elodia [21]

Answer:

The amount invested at 5% was $39,000 and the amount invested at 7% was $11,000

Step-by-step explanation:

we know that

The simple interest formula is equal to

I=P(rt)

where

I is the Final Interest Value

P is the Principal amount of money to be invested

r is the rate of interest  

t is Number of Time Periods

Let

x-----> the amount invested at 5%

50,000-x -----> the amount invested at 7%

so

t=1\ year\\ I=\$2,720\\r_1=0.05\\r_2=0.07\\P_1=\$x\\P_2=\$(50,000-x)

substitute in the formula above

2,720=x(0.05*1)+(50,000-x)(0.07*1)

solve for x

2,720=0.05x+3,500-0.07x

0.07x-0.05x=3,500-2,720\\0.02x=780\\x=\$39,000

(50,000-x)=\$11,000

therefore

The amount invested at 5% was $39,000 and the amount invested at 7% was $11,000

5 0
3 years ago
Liam makes soap sculptures of sea turtles. Each sculpture weighs 3\8 pounds he ships them in a wooden box that weighs 2 pounds t
wlad13 [49]

Answer:

8 turtles

Step-by-step explanation:

Each of Liam's sea turtle sculpture weighs 3\8 pounds and he ships them in a wooden box that weighs 2 pounds.

The weight of the box filled with the sea turtles is 5 pounds.

This means that the weight of the sea turtles in the wooden box is:

5 - 2 = 3 pounds

To find the number of sea turtles in the box, we simply divide the total weight of the turtles in the box by the weight of each turtle. That is:

\frac{3}{\frac{3}{8} } = 8 turtles

There are 8 turtles in the box.

3 0
3 years ago
I WILL GIVE YOU BRAINLIEST, AND 30 POINTS SO PLEASE HELP ME, IT'S URGENT!
evablogger [386]

Answer:

The answer is 6

Step-by-step explanation:

The answer is 6

5 0
3 years ago
Other questions:
  • Write each polynomial function in standard form , classify it by degree and determine the end behavior of its graph Y=12-x^4
    8·1 answer
  • The mean of a population being sampled is 64, and the standard deviation is 6. If the sample size is 50, the standard error of t
    14·1 answer
  • 10- 13 if kind enough plssss w work so i can actually understand
    11·1 answer
  • Diameter: 10 centimeters; height: 14 centimeters
    11·1 answer
  • Please help!!!!!!!!!!!!!
    13·1 answer
  • Is y = -x + 5 non-linear or linear
    10·1 answer
  • How would you find x?
    13·1 answer
  • A metal block is delivered to a construction site. The block is in the shape of a rectangular prism.
    11·2 answers
  • Please explain this is math homework
    12·1 answer
  • These triangles are scaled copies of each other.
    15·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!