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Simora [160]
2 years ago
7

Fiona recorded the mean math exam grade for six random samples of students from the entire seventh-grade class. Sample Sample Me

an Grade 1 65 2 92 3 78 4 45 5 95 6 70 Why is a valid prediction for the mean of the population not possible using these samples?
Mathematics
1 answer:
Charra [1.4K]2 years ago
7 0

The reason why Fiona cannot make a valid prediction based on the mean of the population is that the variation of Fiona’s samples is too large.

<h3>Why can't Fiona use the means she recorded?</h3><h3 />

Mean is quite sensitive to outliers so it is best used when the variation between variables is not too much.

In Fiona's case, there variation is quite high with high variable of 95 compared to a low value of 45.

Find out more on effect of outliers at brainly.com/question/16815987.

#SPJ1

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Determine whether the triangles are similar. or not.
mr Goodwill [35]

Answer:

A

Step-by-step explanation:

We know that ∠ABE ≅ ∠DBC because they are vertical angles, so that's one pair of congruent angles. However, we can't compare ∠BAE and ∠DCB as they have different measures, so we'll have to find the measure of either ∠AEB or ∠BDC. Let's go with the former. Using the fact that the sum of the measures of the interior angles of a triangle is 180°, we know that m∠AEB=180-(53+42)=180-95=85°. Now, we know that ∠AEB ≅ ∠DCB because their measures are equal. That's another pair of congruent angles. Therefore, the angles are similar by AA. Hope this helps!

7 0
3 years ago
The data in the tables below were collected from first year students at a community college. The variable is "number of credit c
Oliga [24]

Solution :

It is given that P(x) is said to be complete or proper probability distribution if it satisfies the following two ways :

1. $P(x) \geq 0$

2. $\sum_z P(x) = 1$

Now consider,

$\sum_z P(x) = 1$

⇒ $P(x=0)+P(x=1)+P(x=2)+P(x=3)+P(x=4)+P(x=5)=1$

⇒ $0.61+T+0.14+0.01+0.01+0.03=1$

⇒ $0.8+T=1$

⇒ $T=1-0.8$

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Therefore, the value of T is 0.2

Thus, option (c) is correct.

7 0
2 years ago
Question:
Andrew [12]

Answer:

(0, -9)

Step-by-step explanation:

The y intercept is the y value when x =0

(0, -9)

4 0
2 years ago
The equation of a circle is . Find the center and the radius of the circle. Then graph the circle.
Korvikt [17]

Answer:

B happy to help!

JESUS LOVES YOU

Step-by-step explanation:

8 0
2 years ago
Read 2 more answers
Solve i=Prt for t, if i=105,p=700,and r=0.05
Katen [24]
3675. You multiply 105 700, then you multiply the answer by 0.05.
5 0
3 years ago
Read 2 more answers
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