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
bekas [8.4K]
2 years ago
15

A survey asks a random sample of 2500 adults in California if they support an increase in the state sales tax from 7.50% to 7.75

%, with the additional revenue going to education. Let Y denote the number in the sample that say they support the increase. Suppose that 30% of all adults in California support the increase. The mean of Y is:_______
Mathematics
1 answer:
Nadusha1986 [10]2 years ago
3 0

Answer:

E(Y) = 750

Step-by-step explanation:

Given

Sample Size = 2500

Percentage = 30%

Required

Calculate Mean of Y

Mean or Expected Value is calculated as thus;

E(Y) = np

Where E(Y) represents the mean

n represents the sample size (or population)

p represents the success probability

n = 2500 ; p = 30%%

p = \frac{30}{100} = 0.3

So,

E(Y) = 2500 * 0.3

E(Y) = 750

Hence, the mean value of Y is 750

You might be interested in
What does this equal? I keep getting different answers every time I try it.​
bija089 [108]

Answer:

19/6 ...or... 3.16 repeating

Step-by-step explanation:

4 5/8 + 2/3 = 19/6

5 0
2 years ago
Consider the system x' = rx + x3 - x5​, which exhibits a pitchfork bifurcation.
trapecia [35]

Answer:

rs = -3/16  and the three minima x₁, x ₂ and x₄ fall at  the value of integrating curve C

Step-by-step explanation:

The answer is found in the attachment.

5 0
3 years ago
the function f(x)=2•5x can be used to represent the curve through the points (1,10) (2,50) and (3,250). What is the multiplicati
Annette [7]
The answer would be 5
8 0
3 years ago
Read 2 more answers
In the typing World 120 words in 3 minutes is average how many words could they type in 2 hours
Molodets [167]

Answer:

7,200 words

Step-by-step explanation:

7 0
2 years ago
Read 2 more answers
The SAT is standardized to be normally distributed with a mean µ = 500 and a standard deviation σ = 100. What percentage of SAT
Aliun [14]

Answer:

34.134%

68.268%

Step-by-step explanation:

Given that:

Mean (m) = 500

Standard deviation (s) = 100

Percentage between 500 and 600

P(500 < x < 600)

P(x < 600) - P(x < 500)

Z = (x - m) / s

P(x < 600)

Z = (600 - 500) /100 = 1

P(x < 500)

Z = (500 - 500) / 500 = 0

P(Z< 1) - P(Z < 0)

0.84134 - 0.5

= 0.34134

= 0.34134 * 100%

= 34.134%

B.) Between 400 and 600

P(x < 400)

Z = (400 - 500) /100 = - 1

P(x < 600)

Z = (600 - 500) / 500 = 1

P(Z< 1 ) - P(Z < - 1)

0.84134 - 0.15866

= 0.68268

= 0.68268 * 100%

= 68.268%

8 0
2 years ago
Other questions:
  • without axtually calculating,how much greater is the product of 98times 50 than the product 97 times 50
    5·2 answers
  • PLEASEE HELP
    9·2 answers
  • Tom drove 504 miles in 8 hours. At the same rate, how many miles would he drive in 12 hours
    15·2 answers
  • 3500 borrowed over 5 years with a interest rate of 4%
    6·2 answers
  • Find the value of X. Please help ASAP!! I have no idea how to do this and I have to have it done soon!!
    14·1 answer
  • Determine the slope of the line that passes through the points M(–3, 5) and N(1, 8). Represent the slope in decimal form.
    9·1 answer
  • Please help fast!!!​
    11·1 answer
  • 2(4x - 1) + 3(3 - 2x) = 0<br> x = -7/2<br> Ox= -7/6<br> Ox= -4<br> OX= -4/3<br> Wats the answer?
    7·1 answer
  • Find cos 2α; the angle α is in the fourth quadrant, and sin α = -0.45. Which double-angle identity should you use?
    5·1 answer
  • Find the trig function indicated. Round your answer to the nearest hundredeths place.
    6·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!