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Tcecarenko [31]

3 years ago

8

Identify the problem with the following study. A local newspaper published the results of a study that claimed "482 people use t

he public library". The study was produced by using a random sample of 87 people from the town

1 answer:

natita [175]3 years ago

8 0

Answer:

well, only 87 people were asked. How did they get 482?

also, they should have asked the people in the library.

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I need the answers plz

enyata [817]

In order to simplify an expression you have to have the same variables, to the same power.

1a) There are no more H's or numbers without a variable.

1b) The variables do not match.

1c) The variable is to a different power so it can't be simplified.

So to simplify you combine your "like terms"

2a,b, and c are correct :)

2d) already simplified

2e) since the variables are the same, just focus on the numbers (x=h since it won't let me use it) answer: 6x
$10x - 4x \\ 10 - 4 = 6 \\ 6x$
2g) For this one 9 has no variable and no like terms, so it stays by itself, just focus on the a's (x=a) answer: 9+4x
$9 + 7x - 3x \\ 7 - 3 = 4 \\ 9 + 4x$
2j) answer: 11y^2+5y
$8y + 6y {}^{2} - 3y + 5y {}^{2} \\ 8y - 3y = 5y \\ 6y {}^{2} { + 5y} {}^{2} = 11y {}^{2} \\ 11y {}^{2} + 5y$

4 0

3 years ago

A four sectioned spinner is numbered 1-4. What is the probability you spin a 2, and then a 4?

Vera_Pavlovna [14]

Answer:

1/4 25%

Step-by-step explanation:

The spinner has 4 sides so the denomination is 4 and you are trying to get one of the 4 sides each so it would be a 1/4 chance for both answers so 25%

5 0

3 years ago

1 3/5 divided by 4 is what

yuradex [85]

Answer:

2/5.

Step-by-step explanation:

1 3/5 / 4

= 8/5 / 4

= 8/5 * 1/4

= 8/20

= 2/5.

5 0

2 years ago

PLEASE HELP ME I WILL GIVE BRAINLIEST

olga55 [171]

Answer:

It all depends on whether the smaller cylinder is wider than the taller one. If that is the case, then they would have the same volume, roughly, because they would still take up the same amount of space, just in different shapes. If they are the exact same width, then the taller one would have the larger volume, since it would have a larger volume, because it would take up more space.

Step-by-step explanation:

7 0

3 years ago

A simple random sample of size n=250 individuals who are currently employed is asked if they work at home at least once per week

Levart [38]

Answer:

99% confidence interval for the population proportion of employed individuals is [0.104 , 0.224].

Step-by-step explanation:

We are given that a simple random sample of size n=250 individuals who are currently employed is asked if they work at home at least once per week.

Of the 250 employed individuals surveyed, 41 responded that they did work at home at least once per week.

Firstly, the pivotal quantity for 99% confidence interval for the population proportion is given by;

P.Q. = $\frac{\hat p-p}{\sqrt{\frac{\hat p(1-\hat p)}{n} } }$ ~ N(0,1)

where, $\hat p$ = sample proportion of individuals who work at home at least once per week = $\frac{41}{250}$ = 0.164

n = sample of individuals surveyed = 250

<em>Here for constructing 99% confidence interval we have used One-sample z proportion statistics.</em>

So, 99% confidence interval for the population proportion, p is ;

P(-2.5758 < N(0,1) < 2.5758) = 0.99 {As the critical value of z at 0.5%

level of significance are -2.5758 & 2.5758}

P(-2.5758 < $\frac{\hat p-p}{\sqrt{\frac{\hat p(1-\hat p)}{n} } }$ < 2.5758) = 0.99

P( $-2.5758 \times {\sqrt{\frac{\hat p(1-\hat p)}{n} } }$ < ${\hat p-p}$ < $2.5758 \times {\sqrt{\frac{\hat p(1-\hat p)}{n} } }$ ) = 0.99

P( $\hat p-2.5758 \times {\sqrt{\frac{\hat p(1-\hat p)}{n} } }$ < p < $\hat p+2.5758 \times {\sqrt{\frac{\hat p(1-\hat p)}{n} } }$ ) = 0.99

<em>99% confidence interval for p</em> = [ $\hat p-2.5758 \times {\sqrt{\frac{\hat p(1-\hat p)}{n} } }$ , $\hat p+2.5758 \times {\sqrt{\frac{\hat p(1-\hat p)}{n} } }$ ]

= [ $0.164-2.5758 \times {\sqrt{\frac{0.164(1-0.164)}{250} } }$ , $0.164+2.5758 \times {\sqrt{\frac{0.164(1-0.164)}{250} } }$ ]

= [0.104 , 0.224]

Therefore, 99% confidence interval for the population proportion of employed individuals who work at home at least once per week is [0.104 , 0.224].

7 0

3 years ago