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Dimas [21]
3 years ago
15

Which size random sample is likely to provide the most trustworthy results

Mathematics
1 answer:
Zarrin [17]3 years ago
4 0
At least 30 observations to get a reasonably normal distribution.
You might be interested in
A 12- foot ladder that is leaning against a wall makes a 75.5 degree angle with the level ground
viktelen [127]

Answer:option C is the correct answer.

Step-by-step explanation:

When the ladder leans against the wall, it forms a right angle triangle with the wall. The length of the ladder becomes the hypotenuse of the right angle triangle.

Since the length of the ladder is 12 foot, then

Hypotenuse = 12 foot

The angle formed by the ladder with the ground is 75.5 degrees. Therefore, the height, y which is the distance from the point where the ladder touches the wall to the foot of the wall becomes the opposite side. It would be determined by applying trigonometric ratio

Sin θ = opposite side/hypotenuse

Sin 75.5 = y/12

6 0
3 years ago
Find the measure of angle X.<br><br><br>11°<br><br>12°<br><br>17°<br><br>61°
nika2105 [10]

Answer:

option B : 12 degree

Step-by-step explanation:

The sum of angles in a triangle = 180 degree

Small box represents 90 degree

From the inner triangle

90 + angle y + 29 = 180 degree

90 + y + 29 = 180

119 + y = 180 (subtract 119 on both sides)

y= 61 degree

 (y+x) is the top angle for bigger triangle

From the outer triangle , 90 + (y+x) + 17 = 180

We know y = 61

90 + (61+x) + 17 = 180

90 + 61 + x 17 = 180

168 +x = 180(subtract 168 on both sides)

x= 12 degrees



6 0
3 years ago
What is the LCM of 80​
grigory [225]

so is the question right?

8 0
3 years ago
Read 2 more answers
HELP I WILL GIVE BRAINLIEST AND 20 POINTS TO CORRECT ANSWER-Hunter is rolling the dice to see what the probability of rolling di
Neko [114]

Answer:

My assumption of the probability would be..

Step-by-step explanation:

1/2

1/3 or less

1/5 or more

1/8

Because if your looking for probability, Its asking for the chance that it will be able to roll in a certain number so you have a 1/2 of it landing on one or the other side if it's a 2 sided coin or a 1/3 if you have a 3 sided triangle shaped dice.

3 0
3 years ago
Read 2 more answers
5. Use the law of Cosines to find each missing sides. Round to the nearest tenth
stellarik [79]

The measure of angle x will be 88 degrees. Then the correct option is C.

The complete question is attached below.

<h3>What is law of cosine?</h3>

Let there is a triangle ABC such that |AB| = a units, |AC| = b units, and |BC| = c units and the internal angle A is of θ degrees, then we have:

2ab cos θ = a² + b² – c²

The triangle is shown below.

Then the value of the variable x will be

2 · 7 · 10 · cos x = 7² + 10² – 12²

       140 · cos x = 49 + 100 – 144

                cos x = (149 – 144) / 140

                       x = 87.95 ≈ 88°

Then the correct option is C.

Learn more about law of cosines here:

brainly.com/question/17289163

#SPJ1

8 0
2 years ago
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