Plsss help mark brain list

Answer:

C. 56

Step-by-step explanation:

7*8=56

Answer:

Hello some data related to your question is missing attached below is the missing data

a) we will reject the null hypothesis hence it can be determined that the salary of politicians is greater than that of EMTs through the use of two-sample t procedures. since ( to > critical value )

b) ( 3.819 , 8.5226 )

Step-by-step explanation:

Applying the Given data:

The test hypothesis :

H0 : μ1 = μ2

Ha : μ1 > 2

A) since ( to > critical value ) we will reject the null hypothesis hence it can be determined that the salary of politicians is greater than that of EMTs through the use of two-sample t procedures

B ) construct and interpret

next calculate the SP value

[tex]S^{2} _{p}[/tex] = [tex]\frac{( n1 - 1 )S^{2} _{1} + ( n_{2}- 1 )S^{2} _{2} }{n1 + n2 - 2}[/tex]

where: S1 = 7524 , n1 = 50 , n2 = 100 , S2 = 5551   ( input values into equation above )

∴ [tex]S^{2} _{p}[/tex] = 39354491.3716

hence : [tex]S_{p}[/tex] = 6273.32

next calculate the value of test statistic

to = ( X1 - X2 - Δo ) / Sp [tex]\sqrt{\frac{1}{n1} + \frac{1}{n2} }[/tex]

where: X1 = 61234 , X2 = 54529 , Sp = 6273.32 , n1 = 50 , n2 = 100  ( input values into equation above )

to = 6705 / 1086.5702 = 6.1708

Df ( degree of freedom ) = n1 + n2 - 2 = 148

critical value at ∝ = 0.01  = ± 2.3518  ( using excel function : T.INV(0.01,148) )

hence the confidence Interval

= ( 6.1708 ± 2.3518 )

= ( 3.819 , 8.5226 )

For the table of Mrs. Toguchi the t test for two sample is not justified and the confidence interval for this two values is (6.1708, ±2.3518).

Random sample is the way to choose a number or sample in such a manner that each of the sample of the group has an equal probability to be chosen.

Mrs. Toguchi wants to determine if politicians tend to have higher salaries, on average, than first responders (specifically emergency medical technicians, EMTs).

Independent random samples from each of these two professions were selected and their salaries were recorded. The data are summarized below.

                                   Politicians        EMT's

Mean                            $61,234       $54,529

Standard deviation      $7524          $5551

n                                      50                100

The hypothesis for the test,

[tex]H_0:\mu_1=\mu_2\\H_a:\mu_1 > 2[/tex]

No it is not justifies, as the null hypothesis is rejected.

The pooled estimate of a common population standard deviation can be given as,

[tex]S_p=\sqrt{\dfrac{(n_1-1)S_1^2+(n_2-1)S_2^2}{n_1+n_2-2}}[/tex]

Put the values in the above formula from the table, we get,

[tex]S_p=\sqrt{\dfrac{(50-1)(7524)^2+(100-1)(5551)^2}{50+100-2}}\\S_p=6273.32[/tex]

Use the formula of test statistics for equal variance as,

[tex]t=\dfrac{\overline y_1-\overline y_2-0}{s_p\sqrt{\dfrac{1}{n_1}+\dfrac{1}{n_2}}}[/tex]

Put the values from the table as,

[tex]t=\dfrac{61234-54529-0}{(6263.32)\sqrt{\dfrac{1}{50}+\dfrac{1}{100}}}\\t=6.1708[/tex]

The degree of freedom can be given as,

[tex]DF=100+50-2\\DF=148[/tex]

The critical value for 99 percent interval (0.01) is ±2.3518.

Hence, the confidence interval for this two values is (6.1708, ±2.3518).

Thus, for the table of Mrs. Toguchi the t test for two sample is not justified and the confidence interval for this two values is (6.1708, ±2.3518).

Learn more about the random sample here;

https://brainly.com/question/17831271

Answer:

10

Step-by-step explanation:

For this you can use the pythagorean theorem such as (a^2 + b^2) = c^2 so the answer will be ten

Answer:

Translated down 8 units or C

Step-by-step explanation:

Answer:

Lincoln will be charged $9,600.

Step-by-step explanation:

To find the answer we will first turn 8% into a decimal.  8 ÷ 100 = 0.08.  Now multiply 0.08 by $5,000 and we get $400.  then multiply $400 by 24 and we get $9,600.  Therefore, $9,600 is our answer.

Answer:

D.82.8°

Step-by-step explanation:

Hope it helps

Have a great day

Answer:

-x^2-8x+15=0

Please mark as brainliest

Answer:

give me a min if you can

Step-by-step explanation:

Answer:

B. it's a square pyramid so the base is a square.

Step-by-step explanation:

Answer:

The answer should be -12

Answer:

= p× r²

= 3,14×7×7

= 21,98×7

= 153,86

[tex]153.86 \div 3.14 = 7[/tex]

Answer:

312z-41-6>12

subtract -41-6

312z-47>12

add it on both sides

312z-47>12

      +47   +47

312z>59

divide 312 to both sides

z<0.189

Answer:

can someone help me pls i dont know 2x=4=

Step-by-step explanation:

Answer:

Should be

Width: 38.7

Length: 77.5

Please give me Brainliest and like

Answer:

B. 135

Step-by-step explanation:

CB is 45

AB= half of circle or 180*

So, 180-45=135

Therefore, the answer is 135* or b

hope this helps

Answer:

135 degrees

Step-by-step explanation:

Since the angle is measured from the center, the arc is the same as the angle measurement.

ACB = 180

AC + CB = 180

AC + 45 = 180

AC = 180-45 = 135

Answer:

he has 46.1538462% left

Step-by-step explanation:

7/13 = 0.538461538

1 - 0.538461538 = 0.461538462

Answer:

x = -1/2y+2

Step-by-step explanation:

4x+2y=8

Step 1: Add -2y to both sides.

4x+2y+−2y=8+−2y

4x=−2y+8

Step 2: Divide both sides by 4.

4x/4 = -2y+8/4

x = -1/2y+2

Hope this helps!

Answer:

65 miles per hour

Answer:

The domain is [tex]D_C = [0,\infty)[/tex]

The range is: [tex]R_C = [20,\infty)[/tex]

Step-by-step explanation:

Domain and range of a function:

The domain of a function are the values that the input assumes, while the range are the values that the output assumes.

In this question:

[tex]C(m) = 0.05m + 20[/tex]

m is the input, which is the number of phone calls, which can be any number between 0 and infinite. So

The domain is [tex]D_C = [0,\infty)[/tex]

When the input is m = 0, the value of C(0) = 20. As m increases, so does C(m). This means that:

The range is: [tex]R_C = [20,\infty)[/tex]

Answer:

Option 1  because

domain: m is Greater than or equal to zero

range: C is greater than or equal to twenty

Step-by-step explanation:

The (C) cost of the bill is always going to start at twenty and be higher depending on how many (m) minutes were used.

Edg2021

Answer:

Volume=3418.1 ft²

Step-by-step explanation:

Volume:π r² h

r=8 ft

h=17ft

π×8²×17

=3418.052 ft³

=3418.1 ft³

hope it helps...

Answer:

x = 42

Step-by-step explanation:

Let the length of the indicated side be represented as "x".

The Theorem of proportionality can be extended and applied to find the indicated side.

Thus, based on the theorem, it is assumed that the parallel lines divides the transversals proportionally.

This implies that:

x/(77 - x) = 30/25

x/(77 - x) = 6/5

Cross multiply

x(5) = 6(77 - x)

5x = 462 - 6x

Add 6x to both sides

5x + 6x = 462

11x = 462

x = 462/11

x = 42

Answer:

hi can i fu k u

Step-by-step explanation:

The answer is:

-0.5, -1.5

Answer:

The Distributive Law says that multiplying a number by a group of numbers added together is the same as doing each multiplication separately.

Step-by-step explanation:

Example:  "3" can be "distributed" across the "2+4" into 3 times 2 and 3 times 4.

Answer:

D

Step-by-step explanation:

hey man. trust me. quack

Answer:

i think that the answer might be d

50000000000000000000000000000000000000000000

Answer:

{(7.9), (13,-2), (8,4), (7,0), (4,12)} is a function

Step-by-step explanation:

Answer:

The answer is 1000.

Step-by-step explanation:

Answer:

angle 1 = 108°

Step-by-step explanation:

because angle 1 and angle 2 are vertical angles and vertical angles are equal.

Answer:

hammood habbi knows

Step-by-step explanation:

32 or 16

Answer:

1.-Then we p-value indicates that we are in the rejection region we reject H₀

We support the claim of the garbage collector the average picking up more than 4 tn of garbage

2.- p  = 75 %

3.-3.-t(s) is in the rejection region we accept H₀ we have not evidence to support Marc´s claim

Step-by-step explanation:

1.- If p-value is 0,04   and significance level α = 5 %  or  α = 0,05 then p-value < α

Test hypothesis should be    ( x the average of garbage)      

Null hypothesis          H₀           x = 4 Tn

Alternative Hypothesis     Hₐ    x  > 4 Tn

Then  alternative hypothesis suggests a one tail-test to the right  and

p-value <  0,05

Then we p-value indicates that we are in the rejection region we reject H₀

We support the claim of the garbage collector the average picking up more than 4 tn of garbage

2.- As we are dealing with a normal distribution the CI  95 % is symmetrical with respect to the mean, therefore the proportion of student living in Brooklyn is:  

(0,73 + 0,77) /2

p = 0,75     p  = 75 %

Test hypothesis:

Null Hypothesis            H₀            μ    =  26

Alternative Hypothesis      Hₐ      μ   <  26

Alternative hypothesis tells us the test is a one-tail test to the left

Sample size   n = 25

Sample mean   μ  =  24,4

Sample Standard deviation  =  9,2

We assume normal distribution, and as n < 30 we use t-student table

with  24 degree of freedom

Significance level is 0,05  and df = 24  we find t (c)  in t- student table

t(c) = 1,7109      test to the left   t(c) = -1,7109

To calculate  t(s)

t(s)  =  (  24,4 - 26 ) / 9,2 / √25

t(s) =  - 1,6 * 5 / 9,2

t(s) = - 0,87

Comparing t(s)  and t(c) we have

t(s) > t(c)

t(s) is in the rejection region we accept H₀ we have not evidence to support Marc´s claim

Answer:

[tex]Median= 20[/tex]

Step-by-step explanation:

Given

The attached box plot

Required

The median

The median is represented by the vertical line inside the rectangle on the box plot.

Using the description above to read the median from the given box plot.

[tex]Median = 20[/tex]

It is also the same as the second quartile