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Alina [70]
3 years ago
7

In a test of physical fitness, a group of men ages 65 and older from a local

Mathematics
2 answers:
olga nikolaevna [1]3 years ago
7 0

Answer: x = 24.5

Step-by-step explanation: Sample mean is the average value of a fraction of the whole population. It is also an estimated of how or what the whole population is doing. To determine it, there is the following formula:

x = ∑\frac{x_{i} }{N}, where:

x is sample mean;

x_{i} is each of the values;

N is the quantity the sample has;

From the given data, N = 16, so,

x = \frac{24+25+10+23+18+29+47+32+19+24+20+28=21+20+27+25}{16}

x = 24.5

The sample mean is x = 24.5

seraphim [82]3 years ago
6 0

Answer:

The sample mean = 24.5

Step-by-step explanation:

Solution:

Using the one sample z test

Since the test is a two tailed test

Null hypothesis,  H₀: μ = 20.

Alternative hypothesis, Ha: µ ≠ 20

The test statistic formula is given by:

z = \frac{\bar{x} - \mu}{\frac{\sigma}{\sqrt{n} } }

The population mean,  µ = 20

The sample mean, \bar{x} = \frac{\sum x}{n}

n = 16

\bar {x} = \frac{24 + 25 + 10 + 23 + 18 + 29 + 47 + 32 + 19+24+20+28+21+20+27+25}{16}

\bar {x} = \frac{392}{16} \\\bar {x} = 24.5

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Alja [10]

Answer:

900

Step-by-step explanation:

10% de 9000 es 900

Trabajando el 10% de 9000

Escribe 10% como 10100

Dado que, encontrar la fracción de un número es lo mismo que multiplicar la fracción por el número, tenemos

10100 de 9000 = 10100 × 9000

Por tanto, la respuesta es 900

Si está utilizando una calculadora, simplemente ingrese 10 ÷ 100 × 9000, lo que le dará 900 como respuesta.

6 0
2 years ago
If m(-12) =0 is the result of M(x) using the reminder theorem then what do -12 and 0 represent?
lions [1.4K]

Suppose we wish to determine whether or not two given polynomials with complex coefficients have a common root. Given two first-degree polynomials a0 + a1x and b0 + b1x, we seek a single value of x such that

Solving each of these equations for x we get x = -a0/a1 and x = -b0/b1 respectively, so in order for both equations to be satisfied simultaneously we must have a0/a1 = b0/b1, which can also be written as a0b1 - a1b0 = 0. Formally we can regard this system as two linear equations in the two quantities x0 and x1, and write them in matrix form as

Hence a non-trivial solution requires the vanishing of the determinant of the coefficient matrix, which again gives a0b1 - a1b0 = 0.

Now consider two polynomials of degree 2. In this case we seek a single value of x such that

Hope this helped, Hope I did not make it to complated

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3 0
3 years ago
Hey mate answer te question please ​
andrezito [222]

Answer:

7 \frac{37}{55}

Step-by-step explanation:

In order to solve an equation like this, you'll need to find a common denominator for your Fraction.

7 \frac{2}{5} + \frac{3}{11}

7 \frac{22}{55} + \frac{15}{55}

7 \frac{37}{55}

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Determine a and k so the given points are on the graph of the function.
pshichka [43]

Step-by-step explanation:

Explanation:

Because

(2,6) is in the function, we can plug

6 as y

and

2 as x.

From that we get

6=a(2−1)2+k

6=a+k

Same for the next point:

12=a(3−1)2+k

12=22a+k

12=4a+k

Now we have this system of equations to solve:

a+k=6

4a+k=12

Solving it leads to the conclusion that

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3 years ago
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