find the mean and median of these data: 2, 7, 13, 15, 17, 19

Pls Pls answer and HURRY​

Answer:

a) The value of the z-statistic is z = -2.55.

b) The p-value for this test is 0.0054.

Step-by-step explanation:

Suppose that in past campaigns 23.8% of customers identified as likely respondents did not respond to a nationwide direct marketing campaign. Test if this proportion has decreased:

This means that at the null hypothesis we test that if the proportion is still 0.238, that is:

[tex]H_0: p =0.238[/tex]

And at the alternate hypothesis we test if the proportion has decreased, that is:

[tex]H_a: p < 0.238[/tex]

The test statistic is:

[tex]z = \frac{X - \mu}{\frac{\sigma}{\sqrt{n}}}[/tex]

In which X is the sample mean, [tex]\mu[/tex] is the value tested at the null hypothesis, [tex]\sigma[/tex] is the standard deviation and n is the size of the sample.

0.238 is tested at the null hypothesis:

This means that [tex]\mu = 0.238, \sigma = \sqrt{0.238*0.762}[/tex]

The analysts selected a random sample of 1500 customers and found that 315 did not respond to the marketing campaign.

This means that [tex]n = 1500, X = \frac{315}{1500} = 0.21[/tex]

a. Determine the value of the z-statistic. Give your answer precise to at least two decimal places.

[tex]z = \frac{X - \mu}{\frac{\sigma}{\sqrt{n}}}[/tex]

[tex]z = \frac{0.21 - 0.238}{\frac{\sqrt{0.238*0.762}}{\sqrt{1500}}}[/tex]

[tex]z = -2.55[/tex]

The value of the z-statistic is z = -2.55.

b. Determine the p-value for this test. Give your answer precise to at least three decimal places.

The p-value of the test is the probability of finding a proportion below 0.21, which is the p-value of z = -2.55.

Looking at the z-table, z = -2.55 has a p-value of 0.0054

The p-value for this test is 0.0054.

Step-by-step explanation:

supplentary means they add to 180

so you can make the formula 180 = 10x + 80

then solve for x

Answer:

x = 10

Step-by-step explanation:

Supplementary angles add up to equal 180°

Thus, 10x + 80 = 180

Now that we have identified the equation we solve for x

10x + 80 = 180

step 1 subtract 80 from each side

80 - 80 cancels out

180 - 80 = 100

we now have 100 = 10x

step 2 divide each side by 10

100 / 10 = 10

10x / 10 = x

we're left with x = 10

Answer:

1st one

Step-by-step explanation:

because it is

Answer:

Option 1

Step-by-step explanation:

In the first one, the first number is lower than -2, the second is between -1 and 0, and 1+1/6 is of course bigger than 0 and smaller than 1+5/6, so it's the right answer.

The second one is the first one reversed, so it's ordered from greatest to lowest.

The third one has a negative number on both ends, but positives in the middle, so it cannot be ordered lowest to greatest. Same with the last one.

Answer:

Mode: 86 ( a number that's repeated the most in the data set)

Range: 47 (Largest number subtracted by the smallest number in the data set)

Median: 56 (Arrange the data in an ascending order and the median is the middle value. If the number of values is an even number, the median will be the average of the two middle numbers)

Mean: 61 (The mean of a set of numbers is the sum divided by the number of terms).

Hope this helps!

Answer:

Y = - 5/3 x - 5

Step-by-step explanation:

Answer:

250 rupees

Step-by-step explanation:

Answer:

A≈615.75m²

Step-by-step explanation:

Solution

A=4πr2=4·π·72≈615.75216m²

Hope this helped!!!

Answer:

GREEN

Step-by-step explanation:

because 0.11 per oz is better than 0.12 per oz

The distance is 32 to get the answer just add them both together since one is negotiable .

We have given that,

point a is located at 18 on the number line. point b is located at -14 on the number line.

We have to determine the distance between point a and point b on the number line.

A number line is a horizontal straight line with numbers placed at equal distances from each other along that line. Some will have a specified starting

The distance is 32 to get the answer just add them both together since one is negotiable .

To learn more about the number line visit:

https://brainly.com/question/24644930

#SPJ2

Answer: 476.88

Step-by-step explanation: length times width times height

Answer:

The answer is 476.88

Step-by-step explanation:

Answer:

Step-by-step explanation:

http://www.mrbartonmaths.com/resources/GCSE%20Revision/GCSE%20Maths%20Takeaway/2.%20Grade%20D/46.pdf

You can find it in this site

Answer:

Step-by-step explanation:

cosT = 4/10 = 2/5

cos^-1(T) = 66.42

Answer:

2is the answer for the question

Answer:

Good luck

Step-by-step explanation:

Sorry I don´t understasnd

The circle parts with overline over them is line segment, such as LQ, the parts with angle sign are angle and part with curve over them is chord.

There are different parts of circle such as chord, radius, diameter, central angle, circumference etc.

In this provided problem, we have to name all the part of the circle shown in the figure.

In the figure,

Thus, the circle parts with overline over them is line segment, such as LQ, the parts with angle sign are angle and part with curve over them is chord.

Learn more about the circle here;

https://brainly.com/question/14068861

#SPJ2

Step-by-step explanation:

C. 3X + 2=8is the correct answer

hope it helps you have a good day

please mark me as brain list it is 100% correct

Answer:

Your answer is C

Step-by-step explanation:

(3 * 2) + 2

6 + 2 = 8

Answer:

5.6 and 3,043.2

Step-by-step explanation:

9514 1404 393

Answer:

  C.)  (3, 2)

Step-by-step explanation:

The coefficients of y are opposites, so we can add the two equations to eliminate y.

  (x +2y) +(x -2y) = (7) +(-1)

  2x = 6 . . . . . simplify

  x = 3 . . . . . . matches choice C

Answer: The value of the question mark should be 28 Since Angles are vertically Opposite

Answer: i believe its the on that says 8g = 22 +26

Step-by-step explanation:

8g = 22+26

8g = 48

48 / 8

g=6

Step-by-step explanation:

Here are the solutions:

For the sample size of 300, with 27 defectives, the sample proportion is p-hat = 27/300 = 0.09.

For a 90% confidence interval of a proportion, use z = 1.645.

The limits of the interval are then:

Lower limit = p-hat - z* sqrt(p-hat*(1 - p-hat)/n) = 0.09 - 1.645*sqrt(0.09*0.91/300) = 0.0628

Upper limit = p-hat + z* sqrt(p-hat*(1 - p-hat)/n) = 0.09 - 1.645*sqrt(0.09*0.91/300) = 0.1172

The 90% confidence interval is then (0.0628, 0.1172)

For the larger sample, assuming that the same proportion of defectives is found (p-hat = 0.09), the new confidence interval would be:

Lower limit = p-hat - z* sqrt(p-hat*(1 - p-hat)/n) = 0.09 - 1.645*sqrt(0.09*0.91/20,000) = 0.0867

Upper limit = p-hat + z* sqrt(p-hat*(1 - p-hat)/n) = 0.09 - 1.645*sqrt(0.09*0.91/20,000) = 0.0933

In this case, the 90% confidence interval is (0.0867, 0.0933)

Thanks,

Answer: 19/28

Step-by-step explanation:

9/28 participate, so that means that ? dont participate.

28/28 = 1 whole

28 - 9 = 19

so 19/28 students do not participate in after school activities.

Answer:

1^2+2^2=5

Step-by-step explanation:

Answer is 5..

Answer:

B. The height of all the students at West Middle school

Step-by-step explanation:

The greatest variability is a large spectrum of possibilities.

The costs of candy from a vending machine are all going to be about the same price because they are all candy, so that doesn't vary much.

The age of all the students in the sixth grade is going to be about the same because they are in the same grade.

The number of days in a month is usually 31 or 30, so that also does not vary much.

This means that it has to be the height of all the students at West Middle school because it is a middle school so there are 3 different grades each having many students. This means that it will have the greatest variability.

Answer:

5

Step-by-step explanation:

the prime factors of 90 are 2 × 3 × 3 × 5 or 2 × 32 × 5, where 2, 3 and 5 are the prime numbers.

Answer:

Venn diagrams

Explanation:

A Venn diagram is a widely used diagram style that shows the logical relation between sets.

Answer:

2 1/4

Step-by-step explanation:

-5 1/4 - (-7 1/2)

Subtracting a negative is like adding

-5 1/4 + (7 1/2)

Get a common denominator

-5 1/4 + (7 1/2 *2/2)

-5 1/4 + (7 2/4)

Since the signs are different, we subtract the smaller from the larger and take the sign of the larger

7 2/4 - 5 1/4

2 1/4

Answer:

B) 2 1/4 or 9/4

Step-by-step explanation:

-5 1/4=-21/4

-7 1/2=-15/2

------------------

-21/4+15/2

-21/4+30/4

9/4

Answer:

more red marbles than blue marbles

no white marbles

hope it is helpful to you

Answer:

Step-by-step explanation:

Sarah’s neighbor offers to pay her $5 for every shark tooth she finds on the beach. After collecting only three shark’s teeth, Sarah decides to share the opportunity with her friend John. Sarah can find shark teeth twice as fast as John, but she can earn even more money with his help.

Sarah can use the expression 5(2j + 3 + j) to represent the amount of money they can earn.

Part 1: Writing Expressions

Q1. Write an expression that looks like Sarah’s expression: 5(2j + 3 + j). Replace the coefficients so that your expression is not equivalent. You may use any number that you choose to replace the coefficients. Be sure to leave the variables the same. For example, 8(3j + 7 + 3j) looks like Sarah’s expression but is not equivalent.

25(10j + 18 + 5j)

Your expression is good.

Q2. Translate the new algebraic expression you created in Question 1 to a verbal expression.  

Skuttle offered to pay his sister Izzy $25 for every four leaf clover she finds in the woods. Izzy finds 18 clovers but decides to get Roxy’s help. Izzy finds clovers twice as fast as Roxy but they will over all make more money together.

Your verbal expression is good. It refrects your chosen equation.

Part 2: Writing Equivalent Expressions

Q3. Use your knowledge of the mathematical properties to create two equivalent algebraic expressions for the algebraic expression you created in Question 1. Explain how you arrived at the equivalent expressions by showing all your steps and stating which properties you used.

Using commutative property of addition, the expression in question 1 can be rewritten as follows:

25(10j + 18 + 5j) = 25(10j + 5j + 18)

Using distributive property of multiplication over addition, the expression in question 1 can also be rewritten as follows:

25(10j + 18 + 5j) = 250j + 450 + 125j

Q 4. Use substitution to prove your algebraic expressions are equivalent. You may substitute any number for the variables you choose. Show all your work for complete credit.

Now we can subsitute, say 7 for j.

For the first expression, we have:

25(10j + 5j + 18) = 25(10(7) + 5(7) + 18)

= 25(70 + 35 + 18) = 25(123) = 3,075.

For the second expression, we have:

250j + 450 + 125j = 250(7) + 450 + 125(7) = 1,750 + 450 + 875 = 3,075.

Thus, we can see that both expressions are equivalent.

Part 3: Finish the Story

Q5. Write a few sentences to end Sarah’s story. How many shark teeth did she find? How many shark teeth did John find? How much money did they earn?

Sarah found 3 + 7 = 10 shark teeth.

John found 10 / 2 = 5 shark teeth.

The total money they earned is $5 x 15 = $75.

1) an expression that looks similar would be (could be anything)

4(5j+8+4j)

2) It would become:

four times the sum of five times a number, eight, and four times the same number

3)  equivalents would be 4(9j+8)

or:

4(5j)+4(8)+4(4j)

4) say J=1 for simplicity

4(9+8)

=4x17

=68

next one would be:

4x5+4x8+4x4

=20+32+16

=68

ok, this is correct.

5) Sarah found 10 shark teeth for $50. John found 5 shark teeth for $25. They got $75 from their neighbor in total.

Step-by-step explanation:

Answer:

Each windowsill goes up by a factor of 12 feet, so the next numbers are 51, 63, 75(feet) and so forth

Step-by-step explanation:

3, 15, 27, 39.....

3+12= 15

15+12= 27

27+12= 39

39+12= 51

51+12= 63

63+ 12= 75