Entre os alunos que frequentam o Ensino Profissional na escola do Carlos foi recolhida umaamostra de 50 aos quais se colocou a questão:

«Qual das seguintes frases exprime melhor o teu gosto pelo estudo da Matemática?

Gosto muito.
Gosto de certos conteúdos.
Gosto pouco.
Não gosto nada.»
O seguinte gráfico traduz as respostas obtidas à questão anterior.





1.1. Indique a variável em estudo e a sua natureza.

1.2. Calcule a percentagem de alunos que responderam «Gosto muito».

1.3. Observe a seguinte tabela ainda referente à mesma questão.



Rapazes

Raparigas

Gosto muito

12

6

Gosto de certos conteúdos

8

7

Gosto pouco

6

6

Não gosto nada

2

3

Escreva um pequeno texto no qual justifique que, neste estudo, os rapazes mostraram ter um maior gosto pelo estudo da Matemática

Antonio had a head start of 3 meters.

We have

Antonio’s Distance Past the Landmark

Time (seconds)      8       12     16      20     24

Distance (meters)   29      41      53    65      77

Change in distance = 12 m

Change in time = 4 seconds

Slope = 12/4 = 3 m/ sec

So, equation of line y = 3x +5

Also a graph titled Candice's Distance Past the Landmark has time (seconds) on the x-axis, and Distance (meters) on the y-axis.

And a line goes through points:

(5, 22), (10, 42), (15, 62) and (20, 82).

Change in distance = 42-20 = 20 m

Change in time = 10-5 = 5 seconds

Slope = 20/5 = 4 m/ sec

So, equation of line y = 4x + 2

Taking the difference

5-2=3

Therefore, Antonio had a head start of 3 meters.

Learn more:brainly.com/question/9275672

Answer:

Antonio had a head start of 3 meters.

Step-by-step explanation:

I took the test on Edge and got it correct.

(Sorry, this is late and you probably don't need it anymore.)

The given number 480 divided by 60 equals 8.

The division process involves successive subtraction of the divisor from the dividend until the remainder becomes less than the divisor.

To 480 divided by 60, to perform this division by dividing 480 by 60, resulting in a quotient of 8.

Division is an arithmetic operation that separates a number into equal groups, in this case, 480 is divided into 60 groups of equal size, and each group contains 8 items.

Dividing 480 by 60 can also be represented as 480 ÷ 60 = 8.

Hence, divide the given number 480 by 60 is equal to 8.

Learn more about Divided here:

brainly.com/question/15381501

#SPJ6

Answer:

8

Step-by-step explanation:

Answer:

So then we expect the 99.7% of the finishing times would be between 68.5 s and 83.5 s for the 400 meters race

Step-by-step explanation:

Let X the random variable who represent the finishing times.

From the problem we have the mean and the standard deviation for the random variable X.

So then the parameters are

On this case in order to check if the random variable X follows a normal distribution we can use the empirical rule that states the following:

The probability of obtain values within one deviation from the mean is 0.68, within two deviations we have 0.95  and within 3 deviations from the mean is 0.997

And from this rule we have 99.7 % of the values within 3 deviations from the mean, so we can find the limits like this:

So then we expect the 99.7% of the finishing times would be between 68.5  s and 83.5 s for the 400 meters race

Final answer:

The middle 99.7% of Tyler's finishing times in the 400 meter race is from 68.5 seconds to 83.5 seconds.

Explanation:

The empirical rule, also known as the 68-95-99.7 rule, states that for data that follows a normal distribution, approximately 68% of the data falls within one standard deviation of the mean, 95% falls within two standard deviations, and 99.7% falls within three standard deviations.

To determine the interval of times that represents the middle 99.7% of Tyler's finishing times, we need to find the range of values that is three standard deviations above and below the mean.

Using the given mean of 76 seconds and standard deviation of 2.5 seconds, we can calculate the interval of times as follows:

Lower Limit: 76 - (3 * 2.5) = 76 - 7.5 = 68.5 seconds

Upper Limit: 76 + (3 * 2.5) = 76 + 7.5 = 83.5 seconds

Therefore, the interval of times that represents the middle 99.7% of Tyler's finishing times is from 68.5 seconds to 83.5 seconds.

Learn more about Empirical rule here:

brainly.com/question/35669892

#SPJ3

Answer:

company B

Step-by-step explanation: