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Serga [27]
3 years ago
7

Z-score and Percentile Help please. Answer with explanation. Both circled numbers

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

I assume all these measures are normally distributed, in which case the median and mean are equal.

15a. P(X>66,650)=0.5 because the normal distribution is symmetric about the mean, and so 50% of families have an income greater than the average.

15b. P(X>178,500)=0.1 by definition of percentile. The 90th percentile is $178,500, so the top 10% of families earn more than this.

15c. Because it's continuous, this distribution has the property P(66,650. The top 10% earn more than $178,500, so the remaining 90% earn less. 50% of families earn more than the average, so 50% of families earn less than the average. Then P(66,650 so 40% of families earn between the median and 90th percentile.

16a. P(X>570)=0.75 or 75% because the first quartile is $570, meaning 25% of renters pay less than this amount.

16b. P(X or 50% by the same reasoning used in (15a).

16c. P(570 or 25% by the same reasoning as in (15c).

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timofeeve [1]

Answer:

On the left, it would be + 1 for each blank, and on the right it would also be +1 for each blank.

Step-by-step explanation:

They are asking for the intervals between each number.

Hope this helps!

3 0
2 years ago
How do I solve 6/2 + 8/3
Xelga [282]

Answer:

The solved given fractional expression is \frac{17}{3}

Therefore the given fractional expression becomes

\frac{6}{2}+\frac{8}{3}=\frac{17}{3}

Step-by-step explanation:

Given fractional expression  is  \frac{6}{2}+\frac{8}{3}

To solve the given fractional expression as below :

\frac{6}{2}+\frac{8}{3}

=3+\frac{8}{3}

 =\frac{3\times 3+8}{3}

( here taking the term 3 as LCM )

=\frac{9+8}{3}  ( by adding the sums here )

=\frac{17}{3}

\frac{6}{2}+\frac{8}{3}=\frac{17}{3}

Therefore the solved  given fractional expression  is  \frac{17}{3}

Therefore the  given  fractional  expression becomes  

\frac{6}{2}+\frac{8}{3}=\frac{17}{3}

The solved  given fractional expression  is  \frac{6}{2}+\frac{8}{3}=\frac{17}{3}

7 0
3 years ago
a cheetah reaches a speed of 30 m/s as it chases its prey. What is the kinetic energy of the cheetah?
ZanzabumX [31]
Kinetic energy is in movement, so the answer is obviously the cheetah running :)
3 0
3 years ago
Solve<br> 10=1.75 + .65x and show steps
Oduvanchick [21]
10-1.75 = 0.65x
9.25 =0.65x
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then simplify or find the exact solution
5 0
3 years ago
help with these all no links- I MEAN IT! and no oh i just came for the points cr_ap brainlyest if correct
natka813 [3]

Answer:

#1

  • Least value = 5

#2

  • Median = 56, option C

#3

  • Median = 113, option C

#4

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#5

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7 0
3 years ago
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