1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
bazaltina [42]
3 years ago
8

Based on a poll, 69% of internet users are more careful about personal information when using a public Wi-Fi hotspot.

Mathematics
1 answer:
Darya [45]3 years ago
8 0

Answer:

a) If we don't have enough info we can create bias in the results and that's not the idea. and since the experiment is conducted in public WIFI spot probably we have some information that will be not share with other and that probably will create bias in the results.

b) P(X \geq 1)

And we can use the complement rule and we have:

P(X \geq 1)= 1-P(X

P(X=0)=(4C0)(0.69)^0 (1-0.69)^{4-0}=0.00923

P(X \geq 1)= 1-P(X

Step-by-step explanation:

Previous concepts

The binomial distribution is a "DISCRETE probability distribution that summarizes the probability that a value will take one of two independent values under a given set of parameters. The assumptions for the binomial distribution are that there is only one outcome for each trial, each trial has the same probability of success, and each trial is mutually exclusive, or independent of each other".

Solution to the problem

Let X the random variable of interest, on this case we now that:

X \sim Binom(n=4, p=0.69)

The probability mass function for the Binomial distribution is given as:

P(X)=(nCx)(p)^x (1-p)^{n-x}

Where (nCx) means combinatory and it's given by this formula:

nCx=\frac{n!}{(n-x)! x!}

Part a

If we don't have enough info we can create bias in the results and that's not the idea. and since the experiment is conducted in public WIFI spot probably we have some information that will be not share with other and that probably will create bias in the results.

Part b

For this case we want this probability:

P(X \geq 1)

And we can use the complement rule and we have:

P(X \geq 1)= 1-P(X

P(X=0)=(4C0)(0.69)^0 (1-0.69)^{4-0}=0.00923

P(X \geq 1)= 1-P(X

You might be interested in
A piece of rope 27m long is cut into two pieces so that one piece is four-fifths as long as the other. Find the length of each p
nata0808 [166]

Answer:

x+.8x=27

1.8x=27

x=15

4/5(15)=12

So 15 and 12

Step-by-step explanation:

8 0
3 years ago
A park has a 3m tall tetherball pole, and a 6.8m tall flagpole. The lengths of their shadows are proportional to their heights.
vlada-n [284]

Complete question is;

A park has a 3 meter tall tether ball pole and a 6.8 m tall flagpole. The lengths of their shadows are proportional to their heights.

Which of the following could be the lengths of the shadows?

Choose 2 answers from the options attached.

Answer:

Options B & D

Step-by-step explanation:

From the question, the proportional relationship between the height and shadow length is a direct proportionality. This means that an increase in the height, leads to an increase in the length of shadow and vice versa. Thus, the height to shadow length ratio is a constant.

Now, if we use x and y to denote length of shadow of tether ball pole and length of flagpole receptively, we will have;

3/x = 6.8/y

Let's make y the subject.

y = 6.8x/3

Looking at the options;

Option A: When x = 1.35 m, we have;

y = (6.8 × 1.35)/3 = 3.06 m

For Option B:

When x = 1.8 m,

y= (6.8 × 1.8)/3 = 4.08 m

For Option C:

When x= 3.75 m,

y = (6.8 × 3.75)/3 = 8.5 m

For option D:

When x = 0.6

y = (6.8 × 0.6)/3 = 1.36 m

For option E;

When x = 2,

y = (6.8 × 2)/3 = 4.533 m

From our calculations, the only values of y that correspond with the given value of y in the options are Options B & D

5 0
3 years ago
Which of the following shows the graph 3x + 9y = 18?
RideAnS [48]

Answer:

it's the 2nd or last one

Step-by-step explanation:

3 0
3 years ago
Help aaahhhh<br>x =x=x, equals <br><br>^\circ <br><br>∘<br><br> degrees
Ganezh [65]

Using supplementary angles, it is found that the measure of angle x is of 65º.

<h3>What are supplementary angles?</h3>

Angles are called supplementary if the sum of their measures is of 180º.

In this problem, angles x, 25, and 90º are supplementary, hence:

x + 25 + 90 = 180

x = 180 - (25 + 90)

x = 65º.

The measure of angle x is of 65º.

More can be learned about supplementary angles at brainly.com/question/12919120

#SPJ1

5 0
2 years ago
The championship record for baseball in a certain year was 52 games won, 14 lost. What percent of the games were won?
marshall27 [118]

73.0769230769% of the games were won

7 0
3 years ago
Read 2 more answers
Other questions:
  • In the typing world,80 words per minute is considered acceptable.how many words per 30 minutes is this
    6·1 answer
  • At a farmers market, oranges sell for $5 per bag and apples sell for $3 per
    5·1 answer
  • A student desired to invest $1,540 into an investment at 9% compounded semiannually for 6 years. With all else equal, what is th
    11·1 answer
  • -13=r/9+8<br> what is r equal to?
    10·1 answer
  • Each question Sandra answers incorrectly changes her overall score by - points. Sandra's
    13·1 answer
  • Y=f(x+4) graphed help
    6·1 answer
  • What is the answer??
    12·2 answers
  • 3.5821568896×10−10 What does this equal?
    14·2 answers
  • 2. A triangular prism has a base area of 27 square inches and a height of 13 inches. What is the
    6·1 answer
  • A small car has a tire with a 13-inch diameter. A truck has a tire with a 29-inch diameter. How much farther than the car does t
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!