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3 years ago

What is most likely true about the population of 250 grand parents

Mathematics

2 answers:

timofeeve [1]3 years ago

5 0

Answer:

Of all adults age 30 and older, 37 percent are grandparents

Step-by-step explanation:

s344n2d4d5 [400]3 years ago

3 0

Answer:

If it is for merchant A it is about 40

Step-by-step explanation:

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Imagine that you are doing an exhaustive study on the children in all of the daycares in your school district. You are particula

alisha [4.7K]

Answer: The difference between M and mu is due to the sampling error is <u>-6.59 .</u>

Step-by-step explanation:

As per given:

in population, the average number of minutes spent in active play on weekends is μ = 65.87

In sample, the average number of minutes the children spend in active play on weekends is M = 59.28

Now, the difference between M and μ is due to the sampling error is M- μ

= 59.28 - 65.87

= -6.59

So, the difference between M and mu is due to the sampling error is <u>-6.59 .</u>

8 0

3 years ago

In a recent survey of 25 voters, 17 favor a new city regulation and 8 oppose it. What is the probability that in a random sample

Rasek [7]

Answer:

$P(X=2)=(6C2)(0.68)^2 (1-0.68)^{6-2}=0.0727$

Step-by-step explanation:

1) Previous concepts

The binomial distribution is a "DISCRETE probability distribution that summarizes the probability that a value will take one of two independent values under a given set of parameters. The assumptions for the binomial distribution are that there is only one outcome for each trial, each trial has the same probability of success, and each trial is mutually exclusive, or independent of each other".

2) Solution to the problem

The probability in favor of the regulation based on the recent survey is:

$p = \frac{17}{25}=0.68$

Let X the random variable of interest "Number of favor respondents about the regulation", on this case we now that:

$X \sim Binom(n=6, p=0.68)$

The probability mass function for the Binomial distribution is given as:

$P(X)=(nCx)(p)^x (1-p)^{n-x}$

Where (nCx) means combinatory and it's given by this formula:

$nCx=\frac{n!}{(n-x)! x!}$

And we want to find this probability:

$P(X=2)=(6C2)(0.68)^2 (1-0.68)^{6-2}=0.0727$

If we use X= "Number of respondednts opposed to the regulation we got the same answer", but on this case p = 1-0.68=0.32, and we want this probability:

$P(X=4)=(6C4)(0.32)^4 (1-0.32)^{6-4}=0.0727$

6 0

3 years ago

F(x) = 10x2 + 8, evaluate f(-3).

OlgaM077 [116]

Answer:

Step-by-step explanation:

f(x) = 10x² + 8

= 10(-3)² + 8

= 10 (9) + 8

= 90 + 8

= 98

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3 years ago

The perimeter of a triangle is 90 cm. The lengths of the sides of the triangle are in the ratios 3:5:7 Work out the length of th

qwelly [4]

Answer:

9cm 5:9

Step-by-step explanation:

7 0

3 years ago

If you answer this question correctly you will also gain one brainliest reward depending on how excellent your answer is. This i

sladkih [1.3K]

Answer:

B, because it's pretty much 3+ and 3- so in result 0

8 0

2 years ago

Read 2 more answers