In order to estimate the statistical difference between the average hourly wages of employees of two branches of a department store, two independent random samples were selected and the following statistics were calculated. Downtown Store North Mall Store Sample size 25 20 Sample mean $9 $8 Sample standard deviation $2 $1 A 95% interval estimate for the difference between the two population means is _____. Group of answer choices

Answers

Answer 1

Answer:

0.076 ; 1.924

Step-by-step explanation:

Given that :

_______Downtown Store ___ North Mall Store

n _______25 _______________20

Mean (m) _ $9 _______________$8

Sample sd_ $2 ______________$1

Standard Error (SE) = √[(s1²/n1) + (s2²/n2)]

√((2^2/25) + (1^2/20)) = 0.4582575

df = (25 + 20) - 2= 43

(m2 - m1) ± t(df = 43 , 0.025) * SE

(9 - 8) ± 2.01669 * 0.4583

(1 - 0.9242) ; (1 + 0.9242)

0.076 ; 1.924


Related Questions

Lourdes recorded in this table the change in her dog's weight, in ounces, each month. Which statement can be suppor by the data in the table? Change in Dog's Weight January February March April May +6 +4 -2 +1 -5

A) Lourdes dog gained weight in more months than it lost weight because there are more positive numbers than ne numbers.

B) Lourdes' dog lost weight in more months that it gained weight because the digit 5 is the greatest digit and it is a ne number.

C) Lourdes dog gained weight every month because it is getting older.

D) Lourdes dog lost weight every month because the change in May is a negative number.​

Answers

Answer:

A). Lourdes dog gained weight in more months than it lost weight because there are more positive numbers then negative numbers

40:10 = 12 :
Equivalent ratio

Answers

40:10=12:3


Solution:

Since
40 : 10 = 12 : X

Then we know
10/40 = X/12

Multiplying both sides by 12 cancels on the right
12 × (10/40) = (X/12) × 12
12 × (10/40) = X

Then solving for X
X = 12 × (10/40)
X = 3

Therefore
40 : 10 = 12 : 3

PLEASE HURRY WILL GIVE BRAINLEST

What is the gross earnings for a person who has $26,480 in total sales, $1250 in Returns and Allowances, and a rate of commission of 7%?

Answers

Answer:

2317.000.00

Step-by-step explanation:

For what value of x is L ll m

Answers

Answer:

x = 89

Step-by-step explanation:

3x - 18 + 105 = 180

3x - 87 = 180

    + 87     + 87

3x = 267

/ 3     / 3

x = 89

Find the value of x. 15 30 120 60

Answers

Answer:  There isnt a question here

Step-by-step explanation:

Helllppppppppppppppppp

Answers

Answer:

B) 5

Step-by-step explanation:

a(x)=1/9(90-x)

x=45

1/9(90-45)

1/9(45)

5

Hope this helps plz hit the crown :D

Answer:

The value of h(45) ⇨ 5  | B Choice.

Step-by-step explanation:

[tex]h(x)=\frac{1}{9}(90-x)[/tex]

⟺ Find the value of h(45), substitute x = 45 in h(x)

[tex]h(45) = \frac{1}{9}(90-45)\\h(45)=\frac{1}{9}(45)\\h(45)=5[/tex]

Thus, the answer is 5.

Simon is playing a card game he needs to collect three cards each card should be a factor of 20 which set of cards should Simon choose 

Answers

Answer:

4 5 and 20

Step-by-step explanation:

what methods of the early Greek historians might be useful to historians today

Answers

Answer:

The study of the past and examining why events took place.

Answer:

The investigation of the past and the causes of events.

34 divided by 523.6




Answer

Answers

Answer:

0.06493506493

Step-by-step explanation:

Answer:

0.064935065

Step-by-step explanation:

Holly is painting her garage. She estimates it will take her
4.5 hours to complete the job. Her brother Jasper offers to help and can paint at half the rate Holly paints. About how many hours should it take for both siblings to complete the job?

Answers

Answer:

3

Step-by-step explanation:

Using the work rate formula (1/Holly's time) + (1/Jasper's time which is twice of Holly's time) = 1/ Total time taken by both

18. A couple is opening a savings account for a newborn baby. They start with
$3,450 received in baby gifts. If no deposits or withdrawals are made, what is
the balance of the account if it earns simple interest at 5% for 18 years?
I

Answers

Answer:

I think you have to do ( 3,450 x .05 ) x 18

Sorry if i'm wrong.

Balance at end is $6,555

Given that;

Amount deposit in bank = $3,450

Rate = 5% = 0.05

Number of year = 18 year

Find:

Balance at end

Computation:I = PRT

Balance at end = PRT + Amount deposit in bank

Balance at end = (3,450)(0.05)(18) + 3,450

Balance at end = 3,105 + 3,450

Balance at end = $6,555

Learn more:

https://brainly.com/question/3304148?referrer=searchResults

For the right triangle shown, use the trig functions to find the value of x. Round your answer to the nearest tenth.
1. 17
2. 12.7
3. 11
4. 12.2

Answers

Answer:

12.7

Step-by-step explanation:

[tex] \sin \: 42 \degree = \frac{x}{19} \\ \\ 0.6691306064 = \frac{x}{19} \\ \\ 0.6691306064 \times 19 = x \\ \\ x = 12.7134815 \\ \\ x \approx 12.7[/tex]

Use a power-reducing formula to rewrite the given expression in terms of the first power of the cosine:
tan^2(8x)

Answers

tan²(8x) = sin²(8x) / cos²(8x)

… = (1 - cos²(8x)) / cos²(8x)

… = 1 / cos²(8x) - 1

… = 2 / (1 + cos(16x)) - 1

where the last equality follows from the half-angle identity for cosine,

cos²(x) = (1 + cos(2x)) / 2

how much is 48 oz in lobby?

Answers

Answer:

bill nyedddddddddddddddddddddddddddddddddddddddddddddddddddddd

Step-by-s dtep explanation:

dddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddd

Lauren saves 30% of her paycheck to purchase the IPhone 12. She earns $325 per paycheck. How much will Lauren have for her IPhone if she has saved from two paychecks?

Answers

Answer:

$195

Step-by-step explanation:

30% of one paycheck = (30/100) x $325 = $97.5

30% of two paychecks = $97.5 x 2 = $195

Suppose that y varies directly with x and y = 12 when x = -2. What is x when y = -6?

Answers

X=1

Explanation:
Conduct a ratio, -2/12=x/-6

You have to find the x in this ratio so you will multiply -2 and -6 together, and multiply 12 and x together and make them equal to eachother. It would look like this.
(-6)(-2)=12x
12=12x
x=1

I hope this is right and I’m sorry if I’m wrong:((

How to Convert 5 over 16 to decimal​

Answers

Answer:

Step-by-step explanation:

Sorry for the shadow.

3. Given that f(x) = 1/ax - 3 and f(x)^-1 = 2x – 6b.
a. Find the values of a and b. ​

Answers

Answer:

a = 2, b = -1

Step-by-step explanation:

type the formula into desmos and adjust the sliders until you have a symmetrical pattern

can someone help me with this

Answers

Answer: 28 hours and 5 min

Step-by-step explanation:

So there are 60 min in hour so the fourmula would be 60x=1683 and when you solve you get 28.05

A cookie recipe asks for 5 cups of sugar for every 25 cookies
made. How much sugar is used per cookie?

Answers

Answer:

0.2 cups of sugar

Step-by-step explanation:

Make a proportion:

5 cups / 25 cookies = x cups / 1 cookie ---> 0.2

Answer:

I'm verrry sorry if i get it wrong plz forgive me if it is but here is my hypothesis.

Step-by-step explanation:

You just divide 5 by 25 which would be 0.2 and so it would be 0.2:1 or 0.2 per cookie

plz mark me brainliest!

**********************

Answers

Answer:

4

Step-by-step explanation:

you do 2x+2x+6+3x+1 as this is simplified then it is 7x+7=35 then you take away 7 and that is 7x=28 and then u do x=28/7 and then you do x=4 you can check by substituting X

What is the GCF of 15 and 60

Answers

Answer:

15

answer is 15 oooooooooooooooooooooooyup

1. What is 4 to the power of 2 ?
2. What is 2 to the power of 4 ?
3. What is 8 to the power of 2 ?
4. What is 2 to the power of 8 ?​

Answers

1. 16
2. 16
3. 64
4. 256

4²= 16

Work - 4 x 4 = 16

2⁴= 16

Work - 2 x 2 x 2 x 2 = 16

8²= 64

Work - 8 x 8 = 64

2⁸= 256

Work - 2 x 2 x 2 x 2 x 2 x 2 x 2 x 2= 256

What are the two methods for finding the constant of proportionality when given a table

Answers

Answer:

If the ratio of one variable to the other is constant, then the two variables have a proportional relationship, If x and y have a proportional relationship, the constant of proportionality is the ratio of y to x.

Step-by-step explanation:

A chicken farmer started his summer with 6
chickens. By fall, he counted 36 chickens,
and by
winter he counted 216 chickens Which expression
represents the number of chickens he had by
winter?
Need help asap!

Answers

Answer: It is multiplying by 6 each time


determine if any of the following listed pairs are congruent, select all that apply

Answers

Is there a picture I can look at?

What is 1400 x 3278
i need help

Answers

Answer:

4,589,200

Step-by-step explanation:

Answer:

4589200

Step-by-step explanation:

hope this helps!! :D

I’ll mark brainliest please help with all and leave a small explanation! :)

Answers

Answer:

A y=6 x= 3

B y=4 x= 2

C y=6 x= 2

D x= 4 y= -2

Step-by-step explanation:

you need to add the numbers on and look how many once u do thag u can see the pattern it makes

Rachel is pouring a concrete patio. Her patio will be 6 inches deep, 6 feet long and 8 feet wide. If she rounds up to the nearest hundredth, how many cubic yards of concrete will she need? (Remember, yd3=in3÷46,656 )

Answers

Answer:

2.6667yd^3

Step-by-step explanation

Volume of the concrete = Length * width * height

Given

height = 6 inches

To yards;

1 in = 0.0277778yd

6 in = 6 * 0.0277778

6in = 0.1666668 yards

Width = 8 feet

Length = 6ft

LW = 48ft²

To yards;

1 ft = 0.333333yd

48 ft = 48(0.333333)

48 ft^ 2 = 15.999984yd^2

Volume = 15.999984 * 0.1666668

Volume = 2.6667 yd^3

Hence she will need 2.6667yd^3 concrete

What is the probability of ordering chocolate ice cream

Answers

What do you mean lol
uhhh i’m confused lol
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