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Kaylis [27]
3 years ago
10

Joe has some pocket money. He spends 90% of it. He has fifty pence left. How much pocket money did he have?

Mathematics
1 answer:
nirvana33 [79]3 years ago
8 0
£5 g g ft vygtvtfyddtvtv ygydjdh3s
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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
When cooking a certain type of rice, the ratio of water to rice should always be 3 to 2. The table below shows this relationship
Komok [63]

Answer/Step-by-step explanation:

3:2 = 6:4 = 15:10

<u>Check work:</u>

3 ÷ 2 = 1.5

6 ÷ 4 = 1.5

15 ÷ 10 = 1.5

5 0
2 years ago
√72<br> Plzzzzzzzz help<br> I have 3 more <br> √619<br> √77<br> √89
andriy [413]

Answer:

\sqrt{72} =8.48528\\\sqrt{619} =24.8797\\\sqrt{77} =8.77496\\\sqrt{89} =9.43398

Step-by-step explanation:

hope this helps :)

6 0
2 years ago
Drag each line to the correct location on the image. Not all lines will be used.
Leona [35]
I will help if you post a picture or something
8 0
1 year ago
Read 2 more answers
Easy quick stuff pls<br><br> Evaluate 11 - 19 - 4 - (-8). <br><br> -20<br> -4<br> -26<br> -2
slamgirl [31]

Answer:

Step-by-step explanation:

11 - 19 - 4 - (-8) =

11 - 19 - 4 + 8 =

- 23 + 19 =

- 4 <===

5 0
2 years ago
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