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nataly862011 [7]
3 years ago
13

Geometry! Please Help!

Mathematics
1 answer:
Damm [24]3 years ago
3 0

x = 7

hope this helps!

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The standard deviation of the sampling distribution of the sample mean is $115,000. The population standard deviation was $25,00
Zina [86]

Answer:

0.31084

Step-by-step explanation:

When given a question where by a random sample is chosen for the population, the z score formula used =

z = (x-μ)/Standard error

where x is the raw score

μ is the population mean

Standard error = σ/√n,

σ is the population standard deviation

n = number of samples

For x = $114,000, μ = $115,000, σ = 25,000, n = 100

z = (x-μ)/Standard error

= z = (x-μ)/ σ/√n

z = 114,000 - 115,000/ 25,000/√100

= -1000/25,000/10

= -1000/2500

z = -0.4

Determining the probability value from Z-Table:

P(x = 114000) = P(z = -0.4)

= 0.34458

For x = $116,000, μ = $115,000, σ = 25,000, n = 100

z = (x-μ)/Standard error

= z = (x-μ)/ σ/√n

z = 116,000 - 115,000/ 25,000/√100

= 1000/25,000/10

= 1000/2500

= 0.4

Determining the Probability value from Z-Table:

P(x = 116000) = P(z = 0.4)

= 0.65542

The probability that the sample mean selling price was between $114,000 and $116,000 is calculated as

= P(114,000< x < 116,000)

= P(-Z<x<Z)

= P(-0.4<x< 0.4

= 0.65542 - 0.34458

= 0.31084

Therefore, the probability that the sample mean selling price was between $114,000 and $116,000 is 0.31084

5 0
2 years ago
Giving brainless I need the answer ASAP
GarryVolchara [31]

Answer:

Is this in Pearson Easybridge?

Step-by-step explanation:

5 0
2 years ago
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A rectangular room has a n actual length of 6 meters and a width of 4 meters. The scale for a drawing is 1 cm = 2 meters. What i
jonny [76]

Answer:

the  answer is  this seems to be a trick question because you have to divide 6 meters by two to get 3 cm and the four also gets divided by 2 cm and that is how i got the aanswer d

Step-by-step explanation:

7 0
2 years ago
How many more students studied for at least 3 hours compared to students who studied
Tatiana [17]

Answer:

5 students

Step-by-step explanation:

9 students studied for more than 3 and 4 students studied less .

9-4=5

4 0
3 years ago
Is the triangle with side lengths of 20 mm, 24 mm,<br> and 36 mm a right triangle
adoni [48]

Answer:

no it's an acute triangle

Step-by-step explanation:

why? because any angle below 90 degrees is considered an acute triangle which in your case 20,24, and 36 are all very far from being a right triangle

7 0
3 years ago
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