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GaryK [48]
2 years ago
5

A small dealership leased 21 Suburu Outbacks on 2-year leases. When the cars were returned at the end of the lease, the mileage

was recorded (see below). 40,060 24,960 14,310 17,370 44,740 44,550 20,250 33,380 24,270 41,740 58,630 35,830 25,750 28,910 25,090 43,380 23,940 43,510 53,680 31,810 36,780 picture Click here for the Excel Data File (a) Is the dealer's mean significantly greater than the national average for 2-year leases, which is 30,000 miles? Using the 10 percent level of significance, choose the appropriate hypothesis. H0: μ ≤ 30,000, reject H0 if tcalc > 1.325 H1: μ ≤ 30,000, reject H0 if tcalc > 1.325 H0: μ > 30,000, reject H1 if tcalc > 1.325 H1: μ > 30,000, reject H1 if tcalc > 1.325 a b c d (b-1) Calculate the test statistic. (Round your answer to 2 decimal places.) Test statistic (c) The dealer's cars show a significantly greater mean number of miles than the national average at the 10 percent level.
Mathematics
1 answer:
Liula [17]2 years ago
4 0

Answer:

yes 30 is the answer

Step-by-step explanation:

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Jamal works in a city and sometimes takes a taxi to work. The taxicabs charge $1.50 for the first 1/5 mile and $0.25 for each ad
Natalija [7]
1.50+.25x=3.75
.25x=2.25
x=9
9/5+1/5=10/5
2 miles
4 0
2 years ago
Read 2 more answers
Using only the values given in the table for the function f(x) = –x3 + 4x + 3, what is the largest interval of x-values where th
nikklg [1K]
I assume you mean -x^3 + 4x + 3 
so what you need is 4x + 3 > x^3
the only whole number it could be is 2 because 2x2x2 +3 > 2x2x2

4 0
2 years ago
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Raya buys a van for £8500 plus VAT at 20%
asambeis [7]

They buy the van for £8,500 + VAT 20%:

Total paid for the van = £8,500 x 1.20 = £10,200

They make 12 payments of £531.25 for a total of:

12 x £531.25 = £6,375

To find the amount of deposit, subtract the total payments from total cost:

£10,200 - £6,375 = £3,825

The ratio of deposit to the payments is: 3825 : 6375

Reduce the answer by dividing both numbers by 75:

3825/75 = 51

6375 / 75 = 85

The ratio becomes: 51/85

6 0
2 years ago
6 questions = 30 points someone please help me
eduard

Answer:

1)D

2)D

3)A

4)B

5)Cannot Answer - No data

6)C

7)C

6 Questions answered for 30 points.

Step-by-step explanation:

Answer for the 1st Question,

Area of a cylinder can be calculated by,

Area of the cylindrical part = 2\pi rL

Area of the parts that cover the open parts of cylinder = 2\pi r^2

Therefor Total are of the cylinder = 2\pi rL+2\pi r^2

Area of the total cylinder = 2*3.14*6.8*14.2+2*3.14*6.8^2

                                          =896.784

<u>Therefor best estimate will be D) 923 in^2</u>


Answer for the 2nd Question,

ABC is a triangle.

By Pythagorean theorem it says,

(AC)^2+(CB)^2=(AB)^2

The distance from A to C = 6

The distance from C to B = 5

(AC)^2=6^2=36

(CB)^2=5^2=25

(AC)^2+(CB)^2=(AB)^2=36+25=61

Therefor (AB)^2=61\\(AB)=\sqrt{61}

<u>Therefor Answer is D) Sqr 61</u>

Answer to Question 3

To find the trend you can draw an imaginary line that fits the scatter plots.(I have attached a image drawing the imaginary lines)

Then the revenue can be calculated by calculating the area covered by the imaginary line drawn or area "under" the curve.

Area of the Store 1 =\frac{1}{2} *(110+40)*110=8250

Area of the Store 2=\frac{1}{2} *110*80=4400

Therefore Revenue from Store 1 = $8250

                 Revenue from Store 2 = $4400

<u>Answer is A) Store 1  has more sales revenue</u>

Answer for Question 4

\frac{5}{12}=0.4167\\\frac{5}{11}=0.4545

You can straight away discard answer D because it is less than both 5/12 and 5/11.

Also you can discard Answer C because 25/264 is very small (less than 1/10=0.1)

\frac{11}{23} =0.4782, therefor this is not in between those two numbers.

Then it has to be \frac{115}{264} =0.4356

<u>Answer is B)</u>


Answer for question 6

The equation of a straight line is of the form y=mx+c

here m is the gradient and c is the intercept.

Find the intercept(c) by finding the y value when x value is 0, here it is +1.

Gradient (m) of the graph can be found by,

\frac{y1-y2}{x1-x2} =\frac{7-3}{3-1} =2

Therefor the equation of the graph is,

y=2x+1

<u>Answer is C</u>

Answer for question 7

\frac{7}{8} =0.875

\frac{6}{9} =0.67

We can discard answer A because the value is close to 0.5

We can discard answer B because 3/17 is a very small value (0.17)

\frac{53}{72} =0.73, This falls between the above 2 numbers.

<u>Therefor answer is C</u>


5 0
2 years ago
The table shows the progress of a plant's growth. The height of the plant, y, is given by the table, where x is the number of da
EleoNora [17]

Answer:

The table shows the progress of a plant's growth. The height of the plant, y, is given by the table, where x is the number of days.

Which statements are correct?

A)

The rate of change is 2 cm.

B)

The plant's height at 10 days is 30 cm.

The plant's height at 30 days is 40 cm.

D)

The initial height of the plant is 0 centimeters high.

Step-by-step explanation:

The plant's growth can be modeled by the equation y-2x+10.

e is the answer please give me brain list

3 0
2 years ago
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