Please help me correct answer gets brainliest

Could someone please answer number 28, letter D.

kozerog [31]

Try to type it on safari you might find the right answer there

5 0

3 years ago

Based on a poll, 60% of adults believe in reincarnation. Assume that 5 adults are randomly selected, and find the indicated p

vlabodo [156]

Answer:

There is a 25.92% probability that exactly 4 of the selected adults believe in reincarnation.

Step-by-step explanation:

For each adult, there are only two possible outcomes. Either they believe in reincarnation, or they do not believe. This means that we can solve this problem using the binomial probability distribution.

Binomial probability distribution:

The binomial probability is the probability of exactly x successes on n repeated trials, and X can only have two outcomes.

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

In which $C_{n,x}$ is the number of different combinatios of x objects from a set of n elements, given by the following formula.

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

And p is the probability of X happening.

In this problem

There are 5 adults, so $n = 5$

60% believe in reincarnation, so $p = 0.6$

What is the probability that exactly 4 of the selected adults believe in reincarnation?

This is P(X = 4).

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

$P(X = 4) = C_{5,4}.(0.6)^{4}.(0.4)^{1} = 0.2592$

There is a 25.92% probability that exactly 4 of the selected adults believe in reincarnation.

3 0

3 years ago

In 1955, a magazine reported that women worked, on average, 80 hours per week. Recently, research has been investigating whether

laiz [17]

<h2>Answer with explanation:</h2>

Let $\mu$ be the population mean.

As per given we have,

$H_0:\mu=80\\\\ H_a:\mu>80$ , since alternative hypothesis is right tailed , so the test is a right-tailed test.

Test statistic : $z=\dfrac{\overline{x}-\mu}{\dfrac{\sigma}{\sqrt{n}}}$

For, n=80 $\sigma=12,\ \overline{x}=80$ , we have

$z=\dfrac{83-80}{\dfrac{12}{\sqrt{80}}}\approx2.236$

Critical z-value at $\alpha=0.05$ =1.645

Since the test statistic value is greater than the critical z-value, so we reject the null hypothesis, i.e. alternative hypothesis is accepted.

Conclusion: We have enough evidence to support the claim that the mean work week has increased for women at the 5% level.

3 0

3 years ago

Two given angles cannot be both..

PolarNik [594]

The right answer is congruent and complementary because they both are different from each other and different causes

4 0

3 years ago

Please do not send links you will be reported and removed. What is this answer in feet please

Yuri [45]

Answer:

16.2 feet

Step-by-step explanation:

Reference angle = 62°

Opposite = x

Adjacent = 8.6

Apply trigonometric function, TOA:

Tan 62 = Opp/Adj

Tan 62 = x/8.6

8.6 × Tan 62 = x

16.1742476 = x

x = 16.2 ft (nearest tenth)

3 0

3 years ago