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Radda [10]
3 years ago
11

On an exam, the average score is 76 with a standard deviation of 6 points What is the probability that an individual chosen at r

andom will have a score below 67 on this exam
Mathematics
1 answer:
AysviL [449]3 years ago
4 0

Answer:

P [ X < 67 ] =  0,66,81      or    66,81 %

Step-by-step explanation:

We assume Normal Distribution  N ( μ ; σ )    N ( 76 ; 6 )

z score for 67 is :

z(s) =  (  X - μ  ) /σ

z(s) =  (  67 - 76 ) / 6

z(s) =  - 9 / 6

z(s) = - 1,5

with 1,5 we fnd n z-table area undr the curve  α = 0,6681

Then  P [ X < 67 ] =  0,66,81      or    66,81 %

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Jennifer is building a square cage for her
stich3 [128]

Each side of the cage is 2x+4 and there are 4 sides.

This means 4(2x+4) which is equal to 8x+16, the answer is <u>B</u>

8 0
3 years ago
Suppose there are 30 people at a party. do you think any two share the same birthday? let's use the random-number table to simul
Arlecino [84]
In this question, you are asked the probability for any of the 30 person to have the same birthday. To answer this it will be easier to calculate how much the probability for no one has same birthday. Let say the first person birthday is 1. Then the next person birthday should be other than 1, which mean 364 possible days out of 365 days. The next person should be 363 possible days out of 365 days
Then the calculation for 30 people would be:   

(365!/365-30!)/(365^(30)= (365!/335!)/ 365^30=  29.4%
Then the probability of at least two person have same birthday would be: 100%-29.4%= 70.6%
4 0
3 years ago
Read 2 more answers
A water dispenser has a capacity of 10,000 milliliters. What is its capacity in liters?
ElenaW [278]

Answer:

10 liters

Step-by-step explanation:

4 0
3 years ago
Read 2 more answers
A statistics professor works tirelessly to catch students cheating on his exams. He has particular routes for his teaching assis
VMariaS [17]

Answer:

The probability of the type I error is 1 %

Step-by-step explanation:

From the given statement we as a professor work to catch student . He ensure view of all student and even a video recording of the exam.He estimates that he catches 95% of student who cheat in his class. 1% of the time he accuses a student of cheating he is actually incorrect.Hence the probability of Type I error is 1 %.

5 0
3 years ago
REALLY NEED HELP<br><br> Evaluate the following expression.<br><br> (−2.2 )·(−2)·(−14)·(5)
Lisa [10]

Answer:

-308

Step-by-step explanation:

Given that:

=(−2.2 )·(−2)·(−14)·(5)

  • As "-" sign into "-" becomes "+"
  • (2.2)(2) = 4.4

=(4.4)*(-14).(5)

  • As (-14)*(5)  = -70

=(4.4)*(-70)

  • Multiplying 4.4 with -70

= -308

I hope it will help you.

8 0
3 years ago
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