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4 years ago

NAME TWO THINGS TO CONSIDER WHEN YOU ARE PLANNING HOW TO SELECT A RANDOM SAMPLE.

Mathematics

1 answer:

slega [8]4 years ago

3 0

Answer:

SELECT WHAT??

Step-by-step explanation:

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|3d-3n|-4 if n=2 and d=3

miv72 [106K]

Answer:

-1

Step-by-step explanation:

$|3d-3n|-4$

Once we have an absolute value, we know that

$|3d-3n| \geq 0$

$\text{For }n=2 \text{ and } d=3$

$|3(3)-3(2)|-4$

$|9-6|-4$

$|3|-4$

$3-4$

$-1$

6 0

3 years ago

Find the value of something <br> 11/12=something/48

Thepotemich [5.8K]

12x4=48
11x4=44
44/48

6 0

3 years ago

Read 2 more answers

The time taken to complete a motorcycle race is normally distributed, with an average time (µ) of 2.5 hours and a standard devia

torisob [31]

Using the normal distribution, there is a 0.5398 = 53.98% probability that a randomly selected cyclist will take at least 2.45 hours to complete the race.

<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 are given, respectively, by:

$\mu = 2.5, \sigma = 0.5$

The probability that a randomly selected cyclist will take at least 2.45 hours to complete the race is <u>one subtracted by the p-value of Z when X = 2.45</u>, hence:

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

$Z = \frac{2.45 - 2.5}{0.5}$

Z = -0.1

Z = -0.1 has a p-value of 0.4602.

1 - 0.4602 = 0.5398.

0.5398 = 53.98% probability that a randomly selected cyclist will take at least 2.45 hours to complete the race.

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

#SPJ1

3 0

2 years ago

20% of the children in a sports club play tennis.

padilas [110]

Answer:

160 children

Step-by-step explanation:

We can get this solution by working backwards in the equation.

First, we can treat the total number of strudents who play tennis as 't'. Giving us the equation: 8 = .25(t) . Solving this we get that there are 32 tennis players.

Next, we have to derive the total number of children in the sports club. Setting up 'x' as the total number of children, I get the equation 32 = .2(x) . Which leads us to the solution of 160 children in the sports club.

8 0

4 years ago

Read 2 more answers

A line passes though (0, –7) and has a slope of m=-2/3 What is the equation of the line in slope-intercept form?

yuradex [85]

We can put it into point slope form first, y-y1=m(x-x1), where m is the slope and (x1,y1) is any point on the line.

y--7=(-2/3)(x-0)

y+7=-2x/3, slope intercept form is y=mx+b, so we simply need to solve for y.

y=-2x/3-7

6 0

4 years ago