A company that makes robotic vacuums claims that their newest model of vacuum lasts, on average, two hours when starting on a full charge. To investigate this claim, a consumer group purchases a random sample of five vacuums of this model. They charge each unit fully and then measure the amount of time each unit runs. Here are the data (in hours): 2.2, 1.85, 2.15, 1.95, and 1.90. They would like to know if the data provide convincing evidence that the true mean run time differs from two hours. The consumer group plans to test the hypotheses H0: μ = 2 versus Ha: μ ≠ 2, where μ = the true mean run time for all vacuums of this model. Are the conditions for inference met?

No, the random condition is not met.
No, the 10% condition is not met.
No, the Normal/large sample condition is not met.
Yes, all conditions for inference are met.

Answers

Answer 1

Answer:

2 one is the right one

Step-by-step explanation:


Related Questions

Isabelle and Brenda are selling bunches of tulips.

→ Each bunch has 7 tulips.

→ Isabelle sold 7 bunches.

→ Brenda sold 3 bunches

What is the total number of tulips the friends sold?

A. 21

B. 42

C. 49

D. 70
PLEASE HELP!!!

Answers

c. 49 is the answer i believe.
It’s is D. 70,
It’s asking the TOTAL- 7(7) = 49 + 7(3) =70 total tulips sold combined


Students from the local high school are selling tickets to the town's annual carnival. Adult
admission is $5.00 and child admission is $2.50. Two hours after the carnival opened its first
day, 440 tickets had been sold totaling $1900. How many adults and how many children
entered the carnival during the first two hours it was open?

Answers

Answer:

320 adults and 120 children

Step-by-step explanation:

First set up two sets of equations. One will equal the total amount of money sold and the other will equal the total amount of tickets sold.

5a + 2.5c = 1900 where a is the # of adult tickets sold and c is the # of children tickets sold

a + c = 440

Now solve for either a or c in the second equation. I chose to solve for a. a=440-c

Use that to substitue into the other equation.

5 (440-c) +2.5c = 1900

2200-5c +2.5c = 1900

-5c+2.5c = -300

-2.5c=-300

c=120

Now plug 120 into the equation a+c=440 and solve for a

NEED HELP!! NO LINKS PLS
Write a quadratic equation in standard form that has the following solutions: x = 4/3 x = - 2/5

Answers

Answer:

[tex](3x-4)(5x+2)[/tex]

Step-by-step explanation:

please help me rn!! no links!

Answers

Answer:

D

Step-by-step explanation:

PLEASE ANSWER I NEED LOTS OF HELP!!!!!!!!!!!!!!

Answers

Answer:

40%

Step-by-step explanation:

Rachael liked 36/90 books movies that she watched. This simplifies to 2/5 which is 0.4. To find the percentage, we multiply 0.4 by 100 to get 40%.

You are on a boat and measuring the height of a lighthouse, off in the distance. Your boat is 45ft from the coast. You measure the angle of elevation from your point on the boat to the top of the lighthouse to be 59∘. Find the height of the lighthouse to the nearest foot.

Answers

This is a trigonometry question, where a right angle triangle is created from the boat to the coast to the top of the light house.

x is the angle of elevation
Opposite is the height of the light house
Adjacent is the distance from coast

Tan(x) = opposite/adjacent

tan (59) = opposite/ 45

tan(59) x 45 = opposite

opposite = 74.893

The height of the light house (from sea level) is 75 foot.

a rectangle has an area of 34 sqaure feet. A larger rectangle has an area of 124 sqaure feet. what is the percent increase of the larger rectangle to the smaller rectangle​

Answers

Answer:

The difference in areas:

124 - 34 = 90 square feet

Percent increase:

90/34*100% = 264.71%

Riley has 24 more stickers than Maria.
Create an expression to show the number of stickers Riley has in terms of n by moving terms and symbols to the lines.
Then move a phrase to complete the sentence to define the variable n.

Answers

Answer:

n+24=x

Step-by-step explanation:

Answer: the 8

Step-by-step explanation:

Which value of x is a solution of x < -2?
A. -3
B. -2
C. - 1
D. O

Answers

Answer:

A

Step-by-step explanation:

-3 is less than -2, so A (-3) is the answer.

Only x = -3 is less than -2.

What is a expression? What is a mathematical equation?A mathematical expression is made up of terms (constants and variables) separated by mathematical operators.A mathematical equation is used to equate two expressions.Equation modelling is the process of writing a mathematical verbal expression in the form of a mathematical expression for correct analysis, observations and results of the given problem.

We have the following inequality -

x < - 2

Given is -

x < - 2

Now, it can be seen that -

- 3 < - 2

Therefore, only x = -3 is less than -2.

To solve more questions on Equations, Equation Modelling and Expressions visit the link below -

brainly.com/question/14441381

#SPJ2

Calcula la hipotenusa del triángulo rectángulo cuyos lados miden 8 y 9

Answers

Respuesta:

12.04 pero puede ser 12

Step-by-step explanation:

a^2 + b^2 = c^2

8^2 + 9^2 = c^2

64 + 81 = 145^2

√145 = 12.04 = 12

find the surface area.

Answers

Answer:

solution given:

For triangle

side1=9ft

side2=10ft

base[b]=11ft

height[h]=7.7ft

and for rectangle

length [l]=3ft

wide [w]=9ft

Now

total surface area=lateral surface area +2curved surface area

=perimeter of triangle×length +2area of triangle

=(9+10+11)×3+2×1/2×2(½×b*h)

=90+11×7.7

=174.7

=175ft²is a required answer.

Arun walked the 6 2/3 kilometre the first day, 5 5/6 kilometre the second day ,and 5 1/3 km the third day .how much did he walk in all ?​

Answers

Answer:

17 5/6 is the answer.

Step-by-step explanation:

6+5+5=16 + 2/3+5/6+1/3

2/3=4/6

1/3=2/6

2+4+5=11/6=1 5/6

1 5/6+ 16=17 5/6

I did this stuff in like 4th grade

Which side lengths cannot form a triangle? Select all that apply.

7 cm, 8 cm, 13 cm

16 cm, 4 cm, 18 cm

24 cm, 14 cm,9 cm

11 cm, 21 cm, 13 cm

11 cm, 22 cm, 11 cm

Answers

7cm,8cm,13cm

16cm,4cm,18cm

11cm,21cm,13cm

Subtract 2xy-8 from 5x^2+3xy+12

Answers

Answer:

5x^2 + xy + 20

Step-by-step explanation:

Begin with 5x^2+3xy+12,  Subtracting 2xy yields 5x^2 + xy + 12.  Next, subtracting -8 yields 5x^2 + xy + 12 - (-8), or   5x^2 + xy + 20

Draw a triangle of sides 6cm,5cm,4cm.and draw an isosceles triangle of the same area

Answers

Answer:

I think not possible to do

60% of 30 can someone help

Answers

the answer to ur question is 18

Jackson is saving money to attend space camp. Space camp costs $948. So far, Jackson has saved $593. He agrees to do these tasks and will save the money he earns from them. He will walk the neighbor's dog every day for a month to earn $42. He will mow the yard for his dad every week for the summer to earn $44. He will pull weeds in the garden for his mom twice a week for the summer to earn $50. After these tasks, how much more money will Jackson still need to save to go to space camp?

Answers

Answer:

219

Step-by-step explanation:

he will still need 219 dollars to get to 948

Which equation is represented by the graph below?
10
10 8 5-4-2
2
В
8
10X
10
0 x = 2 x - 3
O y=x-9

Answers

The equation for that is y=2/3x+6

Need help fast!!!!!!!!

Answers

Answer:

the arc length of minor arc AC is

[tex] \frac{165}{360} .2\pi.3 = \frac{11\pi}{4} [/tex]

Find the mean of the data in the dot plot below.

\text{ g} gstart text, space, g, end text

Answers

Answer: 40.5

Step-by-step explanation: If it help please thanks me!

Answer:

???picture please

Step-by-step explanation:

Someone help!

If there are 365 days in a year and you buy 365 $15 Starbucks gift cards. How much will that cost?

Answers

Answer:

If you buy a 15 dollar gift card every day for a year, it will cost $5,475.

Just take the price, multiply it by the amount.

Answer:

$5475

Step-by-step explanation:

365 X 15 =

(365 x 10) + (365 x 5) =

3650 + 1825 =

$5475

2
Which point on this number line best represents 10?
point A
point B
point C point D

Answers

I would say c because

Answer:

probably 5 because thats half of 10 i guess

Step-by-step explanation:

NEED HELP ASAP
there are 16 ounces in 1 pound. Juan is mailing a package that weighs 96 ounces. He wants to know the weights of the package in pounds

Answers

Answer:

Divide, 16.

Step-by-step explanation:

So, lets look at the unit scale.

For every 16 ounces, there are 1 pound.

To convert ounces to pounds, the number must be divide by 16, since there are 16 ounces in one pound.

The first fill in box answer is division.

Next we must ifnd the actual amount of pounds.

We know that the box weights 96 ounces.

Now lets divide this by ounces per pound, and see what we get:

96/16

=

6

So the box weighs 6 pounds.

This is the answer to the second fill in question.

Hope this helps!

Answer: MULTIPLY N AND 16 THE OTHER GUY IS WRONG

Step-by-step explanation:

DID IT ON I-READY

3 to the power 2x+3 is subtracted by 9 which is equal to 2 times 9 to the power x+1 and is subtrcted by 6

Answers

Answer:

x = -0.5

Step-by-step explanation:

Here we have the sentence:

"3 to the power 2x+3 is subtracted by 9 which is equal to 2 times 9 to the power x+1 and is subtracted by 6"

The first part:

"3 to the power 2x+3 is subtracted by 9..."

This can be written as:

[tex]3^{2x + 3} - 9[/tex]

"... is equal to 2 times 9 to the power x+1 and is subtracted by 6"

[tex]3^{2x + 3} - 9 = 2*9^{x + 1} - 6[/tex]

Let's solve this for x.

First, we can add 9 in both sides:

[tex]3^{2x + 3} = 2*9^{x + 1} - 6 + 9 = 2*9^{x + 1} + 3[/tex]

We also know the relations:

[tex]a^n*a^b = a^{n + b}[/tex]

and

[tex](a^n)^m = a^{n*m}[/tex]

We can write the left part as:

[tex]3^{2x + 3} = 3^{2x}*3^3 = (3^2)^x*3^3 = 9^x*27[/tex]

And the right side as:

[tex]2*9^{x + 1} + 3 = 2*9^x*9 + 3 = 18*9^x + 3[/tex]

Then the equation becomes:

[tex]27*9^x = 18*9^x + 3[/tex]

Now let's move both terms with 9^x to the left side:

[tex]27*9^x - 18*9^x = 3\\[/tex]

[tex](27 - 18)*9^x = 3[/tex]

[tex]9*9^x = 3[/tex]

[tex]9^x = 3/9 = 1/3[/tex]

Now remember that:

Ln(a^b) = b*Ln(a)

Then if we apply the Ln( ) function to both sides, we get:

[tex]Ln(9^x) = Ln(1/3)[/tex]

[tex]x*Ln(9) = Ln(1/3)[/tex]

[tex]x = \frac{Ln(1/3)}{Ln(9)} = -0.5[/tex]

This poem is an example of which of the following? *

penguin
black, white
waddling, swimming, leaping
A tuxedo in cold water
Emperor

A. Sonnet
B. Cinquain
C. Haiku
D. Limerick

Answers

The answer is B. Cinquain. It is describing a penguin

Answer:

a

Step-by-step explanation:

What is the axis of symmetry for the quadratic equation 4x^2-16x+5 plz help

Answers

Answer:

x=2

Step-by-step explanation:

use completeting the square

[tex]4x^2-16x+5=4(x-2)^2-11[/tex]

What is this?

F(x) = (1/3)^x

Answers

Answer:

top right is the answer

Step-by-step explanation:

PLS HELP ASAP
Function g is shown on the graph
Which function represents g

Answers

Answer:

 

Step-by-step explanation:


Which representation shows y as a function of x?

Answers

Ur right it’s B you’re smart

Which of the following is an example of replication?

A. Assigning test subjects to test groups arbitrarily
B. Studying the effects of both therapy and no therapy on students
C. Performing five different studies of the same drug
D. Testing patients by giving them either a new drug or no drug

Answers

Answer:

Step-by-step explanation:

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