A highway inspector needs an estimate of the mean weight of trucks crossing a bridge on the interstate highway system. she selects a random sample of 49 trucks and finds a mean of 15.8 tons with a sample standard deviation of 3.85 tons. the 90 percent confidence interval for the population mean is:

Answers

Answer 1

Answer:

14.90 to 16.70 tons

Step-by-step explanation:

We are given;

Sample size; n = 49

Mean; x¯ = 15.8

Sample standard deviation; s = 3.85

At 90% Confidence interval, z = 1.645

Formula for confidence interval is;

CI = x¯ ± z(s/√n)

Thus;

CI = 15.8 ± 1.645(3.85/√49)

CI = 15.8 ± 0.90

CI = 14.90 to 16.70 tons


Related Questions

PLEASE HELP IM BEGGING
System of equation
y=-2x-10
y=-3x+5

Answers

Answer:

(15,-40)

Step-by-step explanation:

Answer:

1. x, -5 y, 10

2. x, 2 y, 5

Step-by-step explanation:

I couldn't screenshare the graph so i just gave you were to graph the answers

Can you help me on question eight?!

Answers

Answer: A

Step-by-step explanation:

how are the triangles similar??

Answers

Attached a picture. Hope this helps!

During a bike challenge riders have to collect various colored ribbons each half mile they collect a red ribbon each “eighth of a mile they collect a green ribbon and each quarter of a mile they collect your blue ribbon which colors of ribbons will be collected at the three-quarter mile markerDo you know during a bike challenge writers have to collect furious colored ribbons each half mile they collect a red ribbon each eighth of a mile they collect the green ribbon and each quarter of a mile they collect a blue ribbon which colors of ribbons will be collected at the 3/4 mile markerBrian is driving 324 miles to visit some friends he wants to get there in six hours how many miles does he need to drive each hour

Answers

Step-by-step explanation:

ijsjnsns

jjwjwjwjhehwhwjwjwnwjwjwhhwhw

Calvin is making a special cocktail for 124 guests. Each cocktail calls for 0.5 fluid ounces of Becherovka, which is purchased in 750-milliliter bottles. Due to the nature of the event, Calvin expects that each guest will have approximately 6 cocktails. If Becherovka comes in 12 bottles to a case, and each case costs
$189.43, what is the beverage cost per guest?

Answers

9514 1404 393

Answer:

  $1.87 per guest for quantity used

  $1.91 per guest for whole bottles used

  $3.06 per guest for whole cases used

Step-by-step explanation:

The cost of the beverage is ...

  ($189.43/case)(1 case/(12 bottles))(1 bottle/(750 mL)) = $0.02104777.../mL

Each guest consumes 6 cocktails of 0.5 floz each, so ...

  (6 drinks/gues)(0.5 floz/drink)(29.5735295625 mL/floz) ≈ 88.7205 mL/guest

Then the cost per guest is ...

  ($0.02104777.../mL)(88.7205 mL/guest) ≈ $1.86737/guest

The cost per guest for the amount used is about $1.87.

__

The total amount of drink used for all guests is ...

  124(88.7205 mL/guest) ≈ 11,001.4 mL

At 750 mL per bottle, this is ...

  (11,001.4 mL)/(750 mL/bottle) ≈ 14.7 bottles

If you're constrained to pay for 15 bottles, then the cost per guest is ...

  $189.43(15/12)/124 = $1.91 per guest

__

At 12 bottles per case, this is ...

  (14.7 bottles)/(12 bottles/case) ≈ 1.2 cases

If you're constrained to pay for 2 cases, then the cost per guest is ...

  $189.43(2)/124 = $3.06 per guest

pls help

2x− 6/x when x=3

Answers

Substitute.


2(3) - 6/(3)


2(3) = 6

6/3 = 2


6 - 2 = 4

Hey there!

x = 3

2(3) – 6 / 3

2(3) = 6

6 – 6/ 3

6 – 6 = 0

0/3 = 0

Answer: 0 ☑️

Good luck on your assignment and enjoy your day!

~Amphitrite1040:)

what is 62.8 divided by 4

Answers

Answer:

15.7

Step-by-step explanation:

use a calculator lol

62.8 divided by 4 would equal 15.7

Step by Step Solution

More Icon

Reformatting the input :

Changes made to your input should not affect the solution:

(1): "62.8" was replaced by "(628/10)".

STEP

1

:

           314

Simplify   ———

            5

Equation at the end of step

1

:

 314

 ——— ÷ 4

  5

STEP

2

:

        314      

Divide  ———  by  4

         5      

Final result :

 157            

 ——— = 15.70000

 10  

This line is parallel
to the line
2x + 6y = 12.

A) y=-1/3x + 5
B) y=-3x + 1
C) y=3x + 4

Answers

Answer:

Step-by-step explanation:

2x+6y = 12

Rearrange to solve for y

6y = -2x + 12

y = -⅓x+ 2

Slope of line = coefficient of x = -⅓

Parallel lines have the same slope. Answer is A

Give the system of inequalities x-2y=15. 2x+4y=-18 what are x and y

Answers

Answer:

For x-2y=15, it's x= 15 + 2y. For 2x+4y=-18, it's x= -9-2y.

Step-by-step explanation:

helopppppppppppp meeeeeeee

Answers

Answer:

A. Sam owes his dad $12.50

Step-by-step explanation:

Because the two numbers are negatives, it represents that he is in a negative balance meaning that he owes someone the money. Then if you do the basic math, -2.5 - 10 = -12.50.

Answer:

The answer would be B

Step-by-step explanation:

its B becasue its the only explanation that makes sense

P.S I actually know the other questions don't make sense

Your welcome!

Adam had1/3 of a pizza

Answers

What’s the question cause I can’t answer it if there’s no question!?:(

Answer:

yeah anything else...

Step-by-step explanation:

There is a brick patio around a fire pit, as shown. Use 3.14 for pi.
What is the area of the fire pit?

Answers

Answer:

28.27

you just have to know the formula

Is 0.7 bigger or 0.75

Answers

Answer: 0.75 Is bigger

Step-by-step explanation:

0.7 is 0.70

meaning 0.75 is bigger.

Answer:

.75 is larger

Step-by-step explanation:

Think about it in terms of whole number. 75 is greater than 70, therefore .75 is greater than .70

There is a hidden 0 after the .7

help me with math pleaseee

Answers

Answer:

Step-by-step explanation:

2d+4g+2e+2f


A 24-foot ladder leans against a building. The foot
of the ladder is 7 ft from the building. Find the
measure of the angle which the ladder makes with
the level ground.

Answers

Answer:

73°

Step-by-step explanation:

Here we use trigonometry to find the angle. The building and the ground form a perpendicular angle, with the ladder acting as the hypotenuse, we get a right angle. We know the length of adjacent leg from the angle, and the length of the hypotenuse. In this case, we use cosine since cos = adjacent length/hypotenuse length. So cos x= 7/24. To isolate x, we use the inverse function of cos, cos^-1. Then x= cos^-1 (7/24) or 73°.

Im ready to rock but are you ready to roll

Answers

Answer:

let's do this

Step-by-step explanation:

chingadera

Answer:

Sure but i can't roll straight :)

Step-by-step explanation:

What is 1,000,000 written as a power with a base of 10?

Answers

Answer:

101=10 101=1

106=1,000,000 (one million) 10-5=0.00001 (one hundred thousandth)

107=10,000,000 (ten million) 10-6=0.000001 (one millionth)

108=100,000,000 (one hundred million) 10-7=0.0000001 (one ten millionth)

Step-by-step explanation:

Answer:

10^6

Step-by-step explanation:

true or false 1,500 lb > 1 T

Answers

Answer:

False 1 ton is 2000 lb

Step-by-step explanation:

Complete the table for the given rule.
Rule: y = 5x

Answers

where is the table for this?
is there a picture that is supposed to go with this??

what is 20:10 in its simplest

form

Answers

Answer:

2/1

Step-by-step explanation:

20/10 devided by 10 to both numbers

Which triangles are similar to triangle ABC?

Answers

Answer:

Not 100%

Step-by-step explanation:

Um... I would say both but im not 100% sure. Probably should get some more help

the difference between a number,x, and 27 is 5​

Answers

Answer:

x-27=5

Step-by-step explanation:

x=32

Chloe needed to get her computer fixed. She took it to the repair store. The technician at the store worked on the computer for 3.5 hours and charged her $197 for parts. The total was $389.50. What was the cost of labor, per hour?
This is due today pls help now

Answers

389.50 minus 197 for parts will give you your answer

Answer: the answer is 55

(5x2 – 6x + 10) + (x2 + 8x – 4)

Answers

Answer:

There an a mistake

Step-by-step explanation:

(5x2 – 6x + 10) + (x2 + 8x – 4)

There can't be x2  

and 5x2 is that 5*2 or 5*x2

-6x=6 what is x Can you guys help me get the awnser I am very stuck

Answers

Answer:

x = -1

Step-by-step explanation:

-6x/-6 = 6/-6

x = -1

Answer:

X= -1

Steps I used to get the answer:

1. Divide both sides by −6.

x=-1

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

Checking:

−6x=6

1. Let x=-1.

−6×−1=6

2. Simplify −6×−1  to  6.

6=6

Done by NeighborhoodDealer

A supermarket has found that the relationship between a day's high temperature and the amount of money taken in on that day from frozen yogurt sales can be modeled by the equation y = 4x + 164, where x is the high temperature in degrees Fahrenheit and y is the amount taken in from frozen yogurt sales in dollars. Which of these statements is true according to the model?

Answers

I am sure It will be 168x

Answer:

On a day when the high temperature is 79° F, the supermarket can expect to take in $380 in frozen yogurt sales.

Step-by-step explanation:

Solve the inequality for x and identify the graph of its solution.
[1x + 1]< 2
Choose the answer that gives both the correct solution and the correct graph.

Answers

Answer:

x<1

Step-by-step explanation:

[1x + 1]< 2

Simplify both sides of the inequality.

x+1<2

Subtract 1 from both sides.

x+1−1<2−1

x<1

Answer:

x<1

On the graph line, the circle is open on number 1 and is going left

Expressions Task Card # 3
At the Pathway Shopping
store, you buy x bottles of
water for $2.50 each and a
magazine for $6. Write an
expression in simplest form
that represents the total
amount of money you spend.

Answers

Total $ = 2.50x+6
First multiply x by 2.50
Then add 6 to get the total amount spent.

I need this quick please ​

Answers

Answer:

the slope is (2,1)

Step-by-step explanation:

Answer:

2

Step-by-step explanation:

Slope is rise/run. The rise here is 4 and the run is 2. 4/2 is 2. The line rises left to right, so the slope is positive.

Hope it helps!

The diagram shows a semi-circle inside a rectangle of length 120 m.
The semi-circle touches the rectangle at A, B and C.
Not to scale
A
C
120 m
Calculate the perimeter of the shaded region,
Give your answer correct to 3 significant figures,
(5 marks)
I

Answers

Answer:

Answer is 30 m

Step-by-step explanation:

First calculate the cricumfrance of the circle, then divide it by 4 and thats the edge of the shaded area and the radius is the other edjes im pretty sure

Other Questions
Would it be better to have a loan with 5% interest payback in 2 years, or a loan with 2% interest paid back in five years? Explain. Show work to justify your answer. This is a political cartoon depicting a funeral for the Stamp Act. What happened that inspired this illustration? Find the volume of the cylinder. Round to the nearest hundredth.5 mm.25.5 mm.V=mm3 4. Which of the following were most important to the Scientific Revolution?divine wisdom and Biblical textOobservation and experimentationtradition and reliance on Church teachingsancient and classical learning How do you think coronavirus might have made some people doubt religion or Gods presence? Which of the following statements must be true about this diagram? Checkall that apply.wI A. y + z = wI B. W>yC. W> x1 D. z>x1 E. x + y = 2O F. X+ y = w Please help it's due today. Also please don't help if you don't know. how were early humans Marginal and disadvantaged among animals at first? Read each question carefully. Determine the best answer to the question from the four answer choices provided. No national currency No national authority to tax Fear of citizen uprisings What would be the best title for the list? A. Weaknesses of the United States Constitution B. Strengths of the Articles of Confederation C. Reasons for Calling the Constitutional Convention D. Anti-Federalists' Problems with the Articles of Confederation Describe a strategy to visualize and calculate=20% off40. Emma borrows $2,500 from her bank to buy a used car. The loan has a 5.4% annual simple interest rate. If it takes Emma 9 months to pay back the loan, how much interest will she be paying?A. $101.25B. $2,601.25C. $3,715.00D. $10,125.00 Why are nonnative species a threat to biodiversity?They often use up resources that other organisms need.They are not able to successfully breed in the wild.They release pollution into many environments.They easily contract and spread diseases to other organisms. y = 2 4x 3y = 18 solved by substitution please show work so i can understand :) Which of the following ideas might be the central idea of the textA. Concussions need to be taken seriously because they can be very harmfulB. Once youve gotten a concussion once it is easier to get another oneC. Kids should give us sports because they might get concussions D. Girls get concussions more easily than boys What happened in the Sand Creek Massacre?A. Cheyenne Indians attacked white settlers, leading to war.B. American Indians killed pioneers on the Oregon Trail, which led to the construction of the Transcontinental Railroad.C. U.S. soldiers in Colorado attacked a village of American Indians who had been promised protection.D.Free African Americans and American Indians fought together against white settlers. Can someone help me In a lab experiment, 80 bacteria are placed in a petri dish. The conditions are such that the number of bacteria is able to double every 17 hours. How many bacteria would there be after 20 hours, to the nearest whole number? I WILL GIVE BRAINLIEST The bank purchased a desk for a new employee. What type of cost is the purchase of a new desk? A. Fixed Cost B. Variable Cost What is the image of (-3,-7) after a reflection over the x-axis? CAN SOMEONE PLEASE CHECK MY ANSWER!!!!!