Wells Fargo has realized that they lose home mortgage business to other banks that can process the loan applications with less variability in the time it takes to process each application. The bank recently studied this problem, and found that the processing time T is normally distributed with a mean of 13 days. They didnt measure the standard deviation, but they know that 50% of all applications were processed in between 10.5 and 15.5 days. After learning all this, they then fired half of their mortgage loan officers and replaced them with new recruits. They then sampled 25 applications, and found a sample mean of 13 days (same as the old) and a sample standard deviation of 2.5 days.
(a) Test whether their actions have significantly changed their processing time T.
(b) Based on the sample of 25 applications, give a 90% confidence interval for the parameter that
has changed.

Answers

Answer 1

Answer: B

Step-by-step explanation:


Related Questions

Find the length of the rectangle.

7 mi

Area = 56 sq mi

1

A. 21 mi

B. 8 mi

C. 30 mi

D. 4 mi

Answers

Área # 56 sq mi
1
A) 21 mi
the answer is 21 mi which is A

Kelly paid $45.36 for a sweater that was on sale for 25% off the original price. She paid 8% sales tax on the sale price.

What was the original price of the sweater, in dollars​

Answers

The sales tax is determined by computing a percent of the purchase price. To find the sales tax multiply the purchase price by the sales tax rate. Remember to convert the sales tax rate from a percent to a decimal number. Once the sales tax is calculated, it is added to the purchase price.

Step-by-step explanation: Sorry if this doesn't help....

what is the equation of the line that passes through the point (3,4) and has a slope of -2/3

Answers

Аnswer is in а photo. I couldn't аttach it here, but I uploаded it to а file hosting. link below! Good Luck!

xlnk․cf/tcMG

Answer:

y= -2/3x+6

Step-by-step explanation:

Jeremy spent $33 on 3 CDs. At This rate. how much would 6 CDs cost ?​

Answers

It would cost $66.

33/3=11.
It costs $11 per CD.
6*11=66.
It would be $66 for 6 CDs.

Answer:

It would cost Jeremy $66 for 6 CDs

Step-by-step explanation:

3 CDs for $33

3(2)=6

$33(2)=$66

no question, just put thx ig



have a good day

Answers

Answer:

Thank you, thank you, thank you *bows head* ✌️❤️

[tex] \infty \infty [/tex]

Answer:

Yay points

let's go oooohhhhh

(*/_÷)

use division to rename each fraction given below 12/20

Answers

Answer:

[tex]Fraction = \frac{3}{5}[/tex]

Step-by-step explanation:

Given

[tex]Fraction = \frac{12}{20}[/tex]

Required

Rename using division

This simply means that we reduce the fraction

So, we have:

[tex]Fraction = \frac{12}{20}[/tex]

Divide by 4/4

[tex]Fraction = \frac{12/4}{20/4}[/tex]

[tex]Fraction = \frac{3}{5}[/tex]

15 + z = 17.04

What is Z?

Answers

Answer:

2.04

Step-by-step explanation:

To find this we have to subtract 15 from both sides.

15 + z = 17.04

-15        -15

z = 2.04

PLEASE HELP NOW!!!

fill in "always", "sometimes", or "never" to make a correct statement.
if you add a multiple of 4 and a multiple of 7, the sum is ____ a multiple of 7

Answers

9514 1404 393

Answer:

  sometimes

Step-by-step explanation:

4 + 7 = 11 . . . not a multiple of 7

28 + 7 = 35 . . . a multiple of 7

If you add a multiple of 4 and a multiple of 7, the sum is sometimes a multiple of 7.

__

It will be a multiple of 7 when the multiple of 4 used is a multiple of 7, such as 4×7 or 4×14 or 4×21, for example.

Suppose that you're paid $63.24 for 7 hours of work. What is your hourly pay rate?

Answers

Answer:

$9.03

Step-by-step explanation:

Using x for pay rate

63.24=7x Divide both sides by 7

x=9.03

The size your dog and the number of times you take it to the vet, The amount your drive to school and the amount you have to pay for gas, The number of people at your party and the number of sodas you have in the refrigerator. What correlation are all of these. None, Positive, or Negative thanks so much.

Answers

1. No correlation

Those things don't really relate to each other.

2. Positive correlation

The higher the amount you drive your car, the more you'll have to pay for gas.

3. Negative correlation

More people = less soda.

The answer of 4.38 x 10^4 in ordinary notation is

Answers

4,38 * 10⁴ = 4,38 * 10 000 = 43 800

1/4 / (17 + 4)
What’s 1/4 divided by (17+4)

Answers

Answer:

0.0119047619

Step-by-step explanation:

Answer:

21/4

Step-by-step explanation:

1/4 ÷ (17 + 4)

1/4 ÷ (21)

21 × 1/4 = 21/4

-TheUnknownScientist

what are the importance of knowing the theorems on midline, trapezoid and kite​

Answers

Answer:

It is important because it allows you to calculate the surface area of a trapezoidal prism

Step-by-step explanation:

Help with math please, just 7 and 9. Please explain thanks.

Answers

Answer: #7  x=16  #9 x=27

Step-by-step explanation:

#7

This is an isosceles triangle, so the angles formed at the base of the congruent sides are equal.

5x-7=8x-55

48=3x

16=x

#9

This is an equilateral triangle (if 2 angles are 60, the third has to be 60 as well) so the sides are equal

7x+19=11x-89

108=4x

27=x

Pick a random answer

Weekly wages at a certain factory are
normally distributed with a mean of
$400 and a standard deviation of $50.
Find the probability that a worker
selected at random makes between
$250 and $300.

Answers

The answer should be 2.35

A population of 65 foxes in a wildlife preserve triples in size every 12 years. The function y = 65.3*, where x is the number of 12-year periods, models the population growth. How
many foxes will there be after 36 years?
After 36 years there will be foxes. (Type a whole number.)

Answers

Answer:

585 foxes

Step-by-step explanation:

36/12 = 3    

That means there are 3 fifteen-year periods in 36 years.  

So after 3 fifteen-year periods, there will be 65 × 3³ foxes

That is 75(27) foxes  

585 foxes

The sum of the interior angle measures of a convex polygon is 2520° . How many sides does it have?

Answers

Answer:

16

Step-by-step explanation:

number of sides = (sum of interior angles / 180) + 2

(2520 / 180) + 2 = 16 sides

HEEEEEEEEEEEEEELLLLLLLLLLLLLLLLLLPPPPPPPPPPPPPPPPPP

Answers

The answer above is scam. They just tyr to get potns. The correct andwr dos 3736.

Answer:

triangle and cylinder is your answer

Which is a measure of the efficiency of an investment?
A.efficiency cocfficient
B.return on investment
C.return rato

Answers

Answer:

B. return on investment

Step-by-step explanation:

Return on Investment (ROI) is a performance measure used to evaluate the efficiency of an investment or compare the efficiency of a number of different investments.

What number goes on top?

Answers

Answer:

33

Step-by-step explanation:

16+17 math that is why

Mark won 79 lollipops playing hoops at his school game night. Later, he gave three to each of his friends. He only has four remaining. How many friends does he have?

Answers

Answer:

25 friends

Step-by-step explanation:

79 - 4 = 75.

75 ÷ 3 = 25

25 friends

Rosa wants to buy a new TV priced at 499.99 The TV is on sale for 15% off but the cashier informs her that if she applies for a store credit card she can have an additional 10% off. How much will Rosa pay after the discounts and 6% tax have been applied? Write and solve an equation to find the final price.

PLEASE ANSWER AS SOON AS POSSIBLE

Answers

Answer:

$405,44

Step-by-step explanation:

First of all we have to find how much the tv cost after 15% of discount.

we can use this proportion

15 : 100 = x : 499.99

x = (15*499.99)/100 = $74.9985

then we have to subtract the initial value to the value of the discount

499.99-74.9985 = $424,9915

thanks to the card we can apply another 10%

10 : 100 = x : 424,9915

x = (424,9915 *10)/100 = $42,49915

424,9915-42,49915 = $382,49235

now we have to apply taxes

6:100 = x : 382,49235

x = $22,949541

382,49235 + 22,949541 = $405,441891

that can be rewrite as $405,44

If we want to write an equation to solve this problem we can use this

499.99 - (499.99 * 15/100) - 1/10[499.99-(499.99*15/100)] + 6/100{1/10[499.99-(499.99*15/100) = x

What is the median of the following set?
28, 45, 12, 34, 36, 45, 19, 20

28
34
31
35

Answers

Answer:

31 IS YOUR ANSWER!!

Step-by-step explanation:

I would not mind the brainliest please!!

The perpendicular sides of a triangular rug measure 3 feet and 4 feet. Calculate the perimeter of the rug. a. 39 ft c. 21 ft b. 7 ft d. 12 ft Please select the best answer from the choices provided A B C D

Answers

Answer:

D

Step-by-step explanation:

In the comments tell me if you want me to explain.

Answer:

D

Step-by-step explanation:

edge2021

Question
What was the equation of the graph below before it was shifted to the right 1
unit?

Answers

B
I think sorry if wrong

Area = ???????????????

Answers

Answer:

x^2+10x+21

Step-by-step explanation:

Blue box: x*x=x^2

Green box: x*3=3x

Purple box: 7*x=7x

Orange box: 7*3=21

x^2+(3x+7x)+21

Combine like term

A: x^2+10x+21

hasann please help me

Answers

Don’t believe the link^

Answer:

The length and width and height is already given.

Length is: 3 1/2

Width is: 1 1/2

Height is: 2 1/2

The volume of this would be all given lengths multiplied.

Whenever you find an area of a 3 dimensional shape you always multiply the given lengths so: 3 1/2 x 1 1/2 x 2 1/2 = 13 1/8 cm3

Given the function h(t) = 2t second power + 9, evaluate h(5).​

Answers

Step-by-step explanation:

hope this help you! have a great day

Jose and two of his friends are collecting baseball cards. Their goal is for the three of them to collect at least 100 cards in total. At the moment they have 43
cards. If they all plan to now collect the same number of cards, which inequality can Jose use to determine the minimum number of cards each person needs
to collect to reach their goal?

Answers

Answer:

3c + 43 >_ 100

Step-by-step explanation:

1) The endpoints of AB are A(-3, 8) and B(4,5). If AB is
dilated by a scale factor or 2, what is the slope and length
of A'B?
No links pls!!!

Answers

Answer:

ehhhhhhhhhhhhhhhhhhh

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