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andreev551 [17]
3 years ago
11

a) Read section 1.5 in the Yakir textbook. If you were a teacher and had 30 students in your class and wanted to know the class

average on the first quiz, would you use a parameter or a statistic
Mathematics
1 answer:
OlgaM077 [116]3 years ago
7 0

Answer:

Parameter

Step-by-step explanation:

Required

Parameter of Statistic

From the question, we understand that the teacher is to calculate the class average.

To calculate the class average, the teacher will use the mean function/formula, which is calculated as:

Mean = \frac{\sum x}{n}

Generally, mean is an example of a parameter.

<em>So, we can conclude that the teacher will use parameer</em>

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There are 6 members on a board of directors. If they must elect a chairperson, a secretary, and a treasurer, how many different
Gwar [14]

Answer:

120 different slates of candidates are possible.

Step-by-step explanation:

The order is important.

For example, a slate of John, Rose and Elisa means that John is the chairperson, Rose is the secretary and Elisa is the treasurer. If two of them are exchanged, their roles will also be changed. So we use the permutations formula to solve this question.

Permutations formula:

The number of permutations of x elements from a set of n elements is given by:

P_{n,x} = \frac{n!}{(n-x)!}

In this problem, we have that:

6 members will be chosen for 3 roles. So

P_{6,3} = \frac{6!}{(6-3)!} = 120

120 different slates of candidates are possible.

8 0
3 years ago
Please help me find domain/ range and equation
Ivanshal [37]

Answer:

The domain is the x axis from - 10 to 10 horizontal and the range is the y axis - 10 to 10 vertical

6 0
3 years ago
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If you buy $200 headphones and you get 25% off how much money will you save?
mina [271]

Answer: You'll save $50

Work: I just did $200 multiplied by .25 (Percentage of Coupon) and I received the answer $50.

<em>I hope this helps, and Happy Holidays! :)</em>

7 0
3 years ago
Solve the equation - 12.2z - 13.4z=-179.2.​
Stels [109]

Answer: x=7

Step-by-step explanation: -25.6z=-179.2 divide each by -25.6

x=7

8 0
3 years ago
X^(2)+17x+72<br> im confused on how to factor this?
polet [3.4K]

Answer:

  (x +9)(x +8)

Step-by-step explanation:

In a quadratic with leading coefficient 1, the coefficient of the linear term (17) is the sum of factors of the constant term (72). If you know your times tables, you know that 8×9 = 72, and you also know that 8+9 = 17.

With these facts, you can write the factorization as ...

  (x +8)(x +9)

_____

If you need to see the working out, rather than jumping to the end, you can use the sum information to rewrite the linear term:

  x^2 +(8x +9x) +72

Now factor pairs of terms:

  (x^2 +8x) + (9x +72) = x(x +8) +9(x +8) = (x +9)(x +8)

_____

It also helps to be familiar with the product of binomials:

  (x +a)(x +b) = x^2 +(a+b)x +ab

4 0
3 years ago
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