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
malfutka [58]
3 years ago
9

425 school children were surveyed about what they want to be when they grow up, out of a choice of five professions. The results

were Teacher 80, Doctor 105, Lawyer 70, Police officer 70, Firefighter 100. a. Obviously these particular children preferred some occupations over others. Test whether their preference reflects a real difference in the population or not. b. Which of the categories contributed the most to the chi-squared test statistic?
Mathematics
1 answer:
hammer [34]3 years ago
6 0
Given:

425 school children

Teacher : 80
Doctor : 105
Lawyer : 70
Police Officer : 70
Firefighter : 100
Total = 425

After applying Pearson's chi-squared test, it is concluded that this data reflects a real difference in the population. 

x^{2} = summation ((O_i - E_i)^2/E_i)
You might be interested in
Please help will give brainliest
Verizon [17]

Answer:

  • 16.67%

Step-by-step explanation:

<u>Decrease in number:</u>

  • 12 - 10 = 2

<u>Percent decrease:</u>

  • 2/12*100% = 16.67% rounded
5 0
3 years ago
What is the function rule for this question?
Lemur [1.5K]
To calculate the remaining number of teams, use the sequence formula:
a(n) = a(1)Rⁿ-¹
Where a(n) and a(1) are the nth and first terms. R is the factor. Therefore, 24 teams is valid value.
After 5 rounds :
a(5) = 128*(½)⁴
a(5) = 128/16 = 8

8 teams are remained.

6 0
3 years ago
Suppose the true proportion of voters in the county who support a restaurant tax is 0.54. Consider the sampling distribution for
Eva8 [605]

Answer:

The correct answer is:

(a) 0.54

(b) 0.0385

Step-by-step explanation:

Given:

Restaurant tax,

p = 0.54

Sample size,

n = 168

Now,

(a)

The mean will be:

⇒ μ \hat{p}= p

         =0.54

(b)

The standard error will be:

\sigma \hat{p} = \sqrt{[\frac{p(1-p)}{n} ]}

    = \sqrt{[\frac{(0.54\times 0.46)}{168} ]}

    = \sqrt{[\frac{(0.2484)}{168} ]}

    = 0.0385

6 0
3 years ago
What is the perimeter of a rectangle whose length is -3x + 4 and a width of 5x - 2?
denpristay [2]

Answer:

Step-by-step explanation:

Perimeter = 2*(length + width)

=2*(-3x +4 + 5x - 2)

=2*(2x + 2)

=2*2x + 2*2

=4x + 4

3 0
3 years ago
Read 2 more answers
A chef bought some green and red peppers. She bought 18 green peppers, which was 3/4 the total number.
Nezavi [6.7K]
A: Their would be 24 red peppers because I did 18 divided by 3/4 and got 24 and 24 times 3/4 is 18
B:She bought 42 peppers all together because 18 plus 24 is 42
4 0
3 years ago
Other questions:
  • How can you show that two objects are proportional with a graph
    8·1 answer
  • Rasheeda sees a garden in a book. She changes the scale because she wants a garden with different dimensions. The figure below s
    12·2 answers
  • Combining like terms <br><br> simplify each expression<br> -v + 12v
    8·2 answers
  • Solve for n<br> 2n+3= -3.2
    5·2 answers
  • What is the value of x?
    10·2 answers
  • A label wraps around soup can with a radius of 4.3 cm and a height of 6 cm. What is the lateral surface area of the label of the
    13·2 answers
  • Solve for x: 4 over x plus 4 over quantity x squared minus 9 equals 3 over quantity x minus 3. (2 points) Select one: a. x = -4
    11·1 answer
  • I need more answers and I don’t know how to make an account
    10·2 answers
  • Find the solution to the following system by substitution, X+ y = 16 y = 3x + 4 A. (5,19) B. (13,3) C. (3.13) D. (4.16) ​
    14·2 answers
  • 2. You are placing mulch in your yard, and you find that pine chips cost $5 per bag, while oak chips cost $2 per bag. You want t
    11·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!