All categories

3 years ago

PLEASE HELP

Mathematics

2 answers:

Digiron [165]3 years ago

5 0

Answer:

A).invalid because of biased sampling

Step-by-step explanation:

Because we don't know its valid for sure yet. And the logical reasoning would be for biased sampling.

Aleksandr [31]3 years ago

3 0

Right off the bat (haha), we can eliminate B as an answer choice because adults are clearly part of the population; in fact, it says in the background information that their entire population is made of adults. A population, in this context, is the group being researched.

D isn't the correct answer; the fact that adults are the target population doesn't validify anything.

C doesn't entirely prove its point because there are other factors that go into the game being biased. In fact, I would say that this study <em>is </em>biased because the board members only attended 1 game when there are 18 teams. Their data will only pertain to fans of the 2 teams playing each other, and not represent the population as a whole.

A would be my answer for reasons stated above.

You might be interested in

Place the <,> or = symbols between the following:

spayn [35]

The choice A will be the correct choice dealing with proportion

6 0

2 years ago

What is the value of y in the equation 3(3y − 15) = 0? (1 point) <br> 5<br> 6<br> 7<br> 9

frozen [14]

Answer:

Step-by-step explanation:

6 0

2 years ago

How are number lines and the coordinate plane related?

schepotkina [342]

a coordinate plane is a two-dimensional number line where the vertical line is called the y-axis and the horizontal is called the x-axis. And a number line is
a line on which numbers are marked at intervals, used to illustrate simple numerical operations. So how are the related........?

8 0

3 years ago

Find the values of x for which the combined function h(x) = is undefined if f(x) = 5x + 1 and g(x) = x2 - 9.

Rama09 [41]

We need to know the definition of the "combined function" h(x). I'm going to guess--by looking at answers--that the function is $h(x)=\frac{f(x)}{g(x)}$ making it

$h(x)=\frac{5x+1}{x^2-9}$

This function is undefined wherever the denominator is equal to 0 (division by zero is undefined). Factor the denominator.

$h(x)=\frac{5x+1}{(x+3)(x-3)}$

The two values of x that make the denominator 0 are 3 and -3, otherwise written $x=\pm 3$ .

5 0

3 years ago

A survey found that women's heights are normally distributed with mean 62.7 in, and standard deviation 2.8 in. The survey also f

Viefleur [7K]

Using the normal distribution, we have that:

The percentage of men who meet the height requirement is 3.06%. This suggests that the majority of employees at the park are females.

<h3>Normal Probability Distribution</h3>

The z-score of a measure X of a normally distributed variable with mean $\mu$ and standard deviation $\sigma$ is given by:

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

The z-score measures how many standard deviations the measure is above or below the mean.

Looking at the z-score table, the p-value associated with this z-score is found, which is the percentile of X.

The mean and the standard deviation of men's heights are given as follows:

$\mu = 69.3, \sigma = 3.9$ .

The proportion of men who meet the height requirement is is the <u>p-value of Z when X = 62 subtracted by the p-value of Z when X = 55</u>, hence:

X = 62:

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

$Z = \frac{62 - 69.3}{3.9}$

Z = -1.87

Z = -1.87 has a p-value of 0.0307.

X = 55:

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

$Z = \frac{55 - 69.3}{3.9}$

Z = -3.67

Z = -3.67 has a p-value of 0.0001.

0.0307 - 0.0001 = 0.0306 = 3.06%.

The percentage of men who meet the height requirement is 3.06%. This suggests that the majority of employees at the park are females.

More can be learned about the normal distribution at brainly.com/question/4079902

#SPJ1

8 0

1 year ago