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
viva [34]
2 years ago
8

(08.01 mc) sue wants to know how many families in her small neighborhood of 50 homes would volunteer to help at a neighborhood a

nimal shelter. she put all the addresses in a bag and drew a random sample of 25 addresses. she then asked those families if they would volunteer to help at the shelter. she found that 18% of the families would volunteer to help at the shelter. she claims that 18% of the neighborhood families would be expected to help at the animal shelter. is this a valid inference?
Mathematics
1 answer:
Pani-rosa [81]2 years ago
4 0

Answer:

Yes, this is a valid inference because she took a random sample of the neighborhood.

Step-by-step explanation:

As we can see, Sue's survey was perfectly random and without any prejudice.

18% of the families, according to her research, would volunteer at the shelter. According to her, 18% of the local households should be required to volunteer at the animal shelter.

Therefore, given that she chose a representative sample of the area, her conclusion is valid.

You might be interested in
Evaluate (8+t)³-6 when t = 2.
Sophie [7]

Answer:994

Step-by-step explanation: (8+t) -6, t=2

(8+2)^3 -6

10^3-6

1000-6

994

6 0
1 year ago
Alguien que me ayude porfavor !!!!!
statuscvo [17]
Es 10 miles per minute
6 0
3 years ago
Assume that the average life of a refrigerator is 14 years, with the standard deviation given in part (a) before it breaks. Supp
fiasKO [112]

Answer:

The guarantee should be made of X = 1.555 + 14\sigma years, in which \sigma is the standard deviation given in part (a).

Step-by-step explanation:

Normal Probability Distribution:

Problems of normal distributions can be solved using the z-score formula.

In a set with mean \mu and standard deviation \sigma, the zscore of a measure X is given by:

Z = \frac{X - \mu}{\sigma}

The Z-score measures how many standard deviations the measure is from the mean. After finding the Z-score, we look at the z-score table and find the p-value associated with this z-score. This p-value is the probability that the value of the measure is smaller than X, that is, the percentile of X. Subtracting 1 by the pvalue, we get the probability that the value of the measure is greater than X.

Assume that the average life of a refrigerator is 14 years

This means that \mu = 14

The standard deviation given in part (a) before it breaks.

This will be the value of \sigma

However, the company does not want to replace more than 6% of the refrigerators under guarantee. For how long should the guarantee be made?

We need to find the 100 - 6 = 94th percentile, which is X when Z has a pvalue of 0.94. So X when Z = 1.555. So

Z = \frac{X - \mu}{\sigma}

1.555 = \frac{X - 14}{\sigma}

X = 1.555 + 14\sigma

The guarantee should be made of X = 1.555 + 14\sigma years, in which \sigma is the standard deviation given in part (a).

7 0
3 years ago
What quadrant would points (-4,3) lie
IrinaK [193]
You would move 4 to the left and 3 up
5 0
3 years ago
Read 2 more answers
Could somebody help me with this question
dimulka [17.4K]

Answer:

F

Step-by-step explanation:

Since f(x) and g(x) are a negative quadratic (aka, looks like an upside down U), two of them have maximum points and not minimum points. h(x) is the only one with a minimum point.

7 0
3 years ago
Other questions:
  • Which mathematical figure has length but no beginning or end? A. a point B.a segment C.a line D.a ray
    15·1 answer
  • Identify two whole numbers between which the product lies 3*3/4
    5·1 answer
  • I really need help!!
    5·2 answers
  • URGENT!!!! The coleman family had their bill at a resturant reduced by $7.50 because of a special discount. They left a tip of $
    8·1 answer
  • Find the absolute maximum and absolute minimum values of f on the given interval. f(x) = 6x3 − 9x2 − 216x + 3, [−4, 5]
    11·1 answer
  • Graph the equation. (x + 3)2 + (y + 2)2 = 16
    14·1 answer
  • Please help! I really need help and I don't understand this ! Quick!!
    12·2 answers
  • Five times a number which is 3 more than h. Write this as an expression.
    6·2 answers
  • B) The marked price of a calculator is Rs 1,800. The shopkeeper allows 10 %
    6·1 answer
  • What is 7.5 - 1.5 x 3?
    8·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!