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Goshia [24]
1 year ago
9

What are the means and standard deviations for correct answers from attending a review session

Mathematics
1 answer:
Iteru [2.4K]1 year ago
7 0

The mean from attending a review session will be the average of the numbers that are given.

<h3>What is a mean?</h3>

Your information is incomplete. Therefore, an overview will be given. Mean simply means average.

For example, if the given numbers are 2, 4, 6, and 10. The mean will be:

= (2 + 4 + 6 + 10)/4

=22/4

= 5.5

Learn more about mean on:

brainly.com/question/1136789

#SPJ1

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Devin ran 6 over 10 miles on Thursday.He ran 1.5 miles on Saturday. How many total miles didi he run
Diano4ka-milaya [45]

Answer:

17.5 miles

Step-by-step explanation:

6+10+1.5= 17.5

8 0
3 years ago
Felica wants to rent a part room at a game center . The game center charges $50 to rent the room puls $5 per person . if alicia
Kipish [7]

Answer:

17 people

Step-by-step explanation:

135-50=85

85/5=17

6 0
2 years ago
A random sample of 747 obituaries published recently in Salt Lake City newspapers revealed that 344 (or 46%) of the decedents di
cupoosta [38]

Answer:

The probability value is almost equal to 0. Implying that the proportion of people dying  in that particular interval if deaths occurred randomly throughout the year is unusual.

Step-by-step explanation:

The random variable <em>X</em> can be defined as the number of decedents who died in the three-month period following their birthdays.

A random sample of 747 obituaries published recently in Salt Lake City newspapers revealed that 344 (or 46%) of the decedents died in the three-month period following their birthdays (123).

The probability (p) of anyone dying in any quarter if people die randomly during the year is simply 0.25.

The random variable <em>X</em> follows a Binomial distribution with parameters n = 747 and p = 0.25.

But the sample selected is too large and the probability of success is small.

So a Normal approximation to binomial can be applied to approximate the distribution of <em>p</em> if the following conditions are satisfied:

  1. np ≥ 10
  2. n(1 - p) ≥ 10

Check the conditions as follows:

 np=747\times 0.25=186.75>10\\n(1-p)=747\times (1-0.46)=560.25>10

Thus, a Normal approximation to binomial can be applied.

So,  p\sim N(\hat p,\ \frac{\hat p(1-\hat p)}{n}).

Compute the probability that 46% or more would die in that particular interval if deaths occurred randomly throughout the year as follows:

P (p\geq 0.46)=P(\frac{p-\hat p}{\sqrt{\frac{\hat p(1-\hat p)}{n}}}>\frac{0.46-0.25}{\sqrt{\frac{0.25(1-0.25)}{747}}})

                   =P(Z>13.25)\\=1-P(Z

 *Use a <em>z</em> table for the probability.

The probability value is almost equal to 0. This probability is very low indicating that the proportion of people dying  in that particular interval if deaths occurred randomly throughout the year is unusual.

3 0
2 years ago
Please help!! <br><br><br> Find the inverse of y=7x-10. Is the inverse a function?
kolezko [41]

Answer: f^{-1} (x) = \frac{x+10}{7}

Step-by-step explanation:

To find the inverse , all we need do is to make x the subject of the formula.

y = 7x - 10

Add 10 to both sides

y + 10 = 7x

divide both sides by 7

Therefore:

x = y + 10 / 7 , that is

f^{-1} (x) = \frac{x+10}{7}

8 0
3 years ago
Read 2 more answers
Which shows the graph of the solution set of 2x + 3y ≤ 6?
irina [24]
The dividing line will have to hit the points (0,2) and (3,0)
then you can test the point (0,0) which satisfies the inequality, so you will shade the side that has (0,0) on it, so it's the first picture.
4 0
3 years ago
Read 2 more answers
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