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3 years ago

I could use some help on this. thanks

Mathematics

2 answers:

AleksAgata [21]3 years ago

5 0

Answer: is B

Step-by-step explanation:

Dennis_Churaev [7]3 years ago

5 0

Answer:

1 to 1?

Step-by-step explanation:

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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

Nadusha1986 [10]

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

3 0

3 years ago

What is the answer equal????

zhuklara [117]

Put 4/2 that's the answer

4 0

3 years ago

Read 2 more answers

A research company desires to know the mean consumption of meat per week among people over age 23. A sample of 164 people over a

Elan Coil [88]

Answer:

The 80% confidence interval for the mean consumption of meat among people over age 23 is between 4 and 4.2 pounds.

Step-by-step explanation:

We have that to find our $\alpha$ level, that is the subtraction of 1 by the confidence interval divided by 2. So:

$\alpha = \frac{1-0.8}{2} = 0.1$

Now, we have to find z in the Ztable as such z has a pvalue of $1-\alpha$ .

So it is z with a pvalue of $1-0.1 = 0.9$ , so $z = 1.28$

Now, find M as such

$M = z*\frac{\sigma}{\sqrt{n}}$

In which $\sigma$ is the standard deviation of the population and n is the size of the sample.

$M = 1.28*\frac{0.7}{\sqrt{164}} = 0.07$

The lower end of the interval is the mean subtracted by M. So it is 4.1 - 0.07 = 4.03 pounds

The upper end of the interval is the mean added to M. So it is 4.1 + 0.07 = 4.17 pounds

Rounded to one decimal place

The 80% confidence interval for the mean consumption of meat among people over age 23 is between 4 and 4.2 pounds.

8 0

3 years ago

How to divide like that

Lady bird [3.3K]

Step-by-step explanation:

First you divide the numerator and the denominator by 10, it leaves you with 1500/21 , now you again divide the numerator and denominator by 3 and you get 500/7.

Remember, you ought to divide the numerator and the denominator only by the numbers which are their common factors or in a more easier way, you only divide them by a number which divides them both simultaneously.

3 0

3 years ago

The principal observes 8th grade the following day. Of the 120 students, 42 brought their lunch from home, 72 purchased lunches,

Rama09 [41]

Answer:

i pretty sure i do not know that answer to be honest

Step-by-step explanation:

i believe this because i dont know anything about this im still lost

8 0

2 years ago