Who or what is this quote directly criticizing brainly

In a multiple choice exam, there are 5 questions and 4 choices for each question (a, b, c, d). Nancy has not studied for the exa

maria [59]

Using the binomial distribution, it is found that there is a 0.6836 = 68.36% probability that she guesses at least one right.

For each question, there are only two possible outcomes, either she gets it right or she does not get it right. The probability of getting a question right is independent of any other question, hence the <em>binomial distribution</em> is used to solve this question.

<h3>What is the binomial distribution formula?</h3>

The formula is:

$P(X = x) = C_{n,x}.p^{x}.(1-p)^{n-x}$

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

The parameters are:

x is the number of successes.

n is the number of trials.

p is the probability of a success on a single trial.

In this problem:

There are 5 questions, hence n = 5.

For each question, she guesses one out of 4 options, hence p = 1/4 = 0.25.

The probability that she guesses at least one right is:

$P(X \geq 1) = 1 - P(X = 0)$

In which:

$P(X = x) = C_{n,x}.p^{x}.(1-p)^{n-x}$

$P(X = 0) = C_{4,0}.(0.25)^{0}.(0.75)^{4} = 0.3164$

Hence:

$P(X \geq 1) = 1 - P(X = 0) = 1 - 0.3164 = 0.6836$

0.6836 = 68.36% probability that she guesses at least one right.

You can learn more about the binomial distribution at brainly.com/question/24863377

8 0

1 year ago

Coach Silva likes statistics. In fact, after each game he examines many variables to prepare for his next opponent. Which one of

enyata [817]

The variable which is categorical in nature is: the color of the opposing team's jerseys.

<h3>What is a categorical data?</h3>

A categorical data can be defined as a type of statistical data that is used to group information that are having the same attributes or characteristics. Some examples of a categorical data include the following:

Age
Gender
Race
Religion
Class

In this context, we can infer and logically deduce that the variable which is categorical in nature is the color of the opposing team's jerseys.

Read more on categorical data here: brainly.com/question/20038845

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Complete Question:

Coach Silva likes statistics. In fact, after each game he examines many variables to prepare for his next opponent. Which one of the following variables is categorical?

the color of the opposing team's jerseys

the number of passing yards for the quarterback

the attendance

the number of plays ran by the offense

7 0

10 months ago

The truck costs $ 9,068 including a 19% port tax. If the selling price is reduced by 20%. Find out the new car price before tax

Anuta_ua [19.1K]

The price of the new vehicle without tax is $5,876.06

3 0

2 years ago

Which of the following is not part of being an active listener?.

My name is Ann [436]

When they ask you what they just said and you don’t know what to say because u didn’t listen ur not an active listener

4 0

2 years ago

Why is astronomy considered the first science

maksim [4K]

Answer:

Astronomy is one of the oldest sciences

5 0

2 years ago