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Gwar [14]
3 years ago
8

I need help with this

Mathematics
1 answer:
Kobotan [32]3 years ago
5 0

The answers are in the picture. Good luck

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A major car dealership has several stores in a big city. The owner wants to determine if there is a difference in the proportion
Gemiola [76]

Answer:

confidence interval = ( -0.38 , 0.08 )

Step-by-step explanation:

Given data :

n1 = 55 , n2 = 60 ,

Let P1 ( proportion of SUV sales at store A ) = 30 / 55 = 0.55

P2 ( sample proportion of SUV sales at store B ) = 42/60 = 0.70

The Z-value at 99% confidence Interval = 2.58

<u>Determine the 99% confidence interval for difference in proportion</u>

applying the formula below

( P1 - P2 ) ± Z ( \sqrt{p1( 1-p1)/n1  +  p2(1-p2)/n2}

Input values above into equation

confidence interval = ( -0.38 , 0.08 )

5 0
3 years ago
Find value of cos75 degrees
AfilCa [17]

Answer:

0.258819045...

Step-by-step explanation:

just plug it into a calculator

7 0
2 years ago
 Jessica is planting a garden. It has the shape of a right triangle. She wants 4 plants for each square foot of area. How many p
BigorU [14]

Answer:

21 plants are in the garden

Step-by-step explanation:

here , base = 7 m

height = 24 m

Thus , The area of the triangle (garden ) is 84 m ²

he wants 4 plants for each square meter of area.

therefore , for 84 m ² number of plants are

i.e 21 plants

hence , 21 plants are in the garden

8 0
3 years ago
Is this a right triangle?<br> 25 cm, 23 cm, and 14 cm.<br> O YES<br> O NO
madam [21]

Answer:

no

Step-by-step explanation:

6 0
3 years ago
− 3 − {3 − [ − 3(2 +4) − ( − 2)]}
Readme [11.4K]
-22 is the answer i got
4 0
3 years ago
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