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lisabon 2012 [21]
3 years ago
9

A set of biology exam scores are normally distributed with a mean of 70 points and a standard deviation of 6

Mathematics
2 answers:
Maslowich3 years ago
8 0

Answer:

To two decimal places, we have 0.93

Step-by-step explanation:

We start by calculating the z-score

Mathematically;

z-score = (x-mean)/SD

here, x = 61

mean = 70 and SD = 6

So, we have ;

z-score = (61-70)/6

z-score = -9/6 = -1.5

So we want to calculate the probability of z > -1.5

We use the standard normal distribution table for this

The answer here according to the table is 0.93319

To 2 decimal places, this is 0.93

bezimeni [28]3 years ago
7 0

Answer:

.69

Step-by-step explanation:

Normalcdf (lower: 0, upper: 73, mean: 70, S.D.: 6) = .691462 --> .69

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Answer:

Step-by-step explanation:

x = 8

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2 years ago
Question 1
Ilia_Sergeevich [38]

We will see that the perimeter of the rectangle is exactly 390 ft, so the statement is true.

<h3>Is the fence enough?</h3>

For a rectangle of length L and width W, the perimeter is given by:

P = 2*(L + W).

In this case, we know that:

L = 120 ft

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Replacing that on the perimeter equation we get:

P = 2*(120 ft + 75  ft) = 390 ft

So the perimeter is exactly 390 ft, meaning that to put a fence around the parking lot the company will need at least 390 ft of fence.

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If you want to learn more about perimeters, you can read:

brainly.com/question/24571594

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2 years ago
One pound of red grapes cost $2.42 Ella buys worth 0.5 pound how much does she spend on red grapes
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Answer:

1.21

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The cost of the grapes is the price per pound times the number of pounds

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cost = 1.21

7 0
3 years ago
Find the next four terms of the sequence 5, 4, 9, 13, 22
Ganezh [65]

Hello,

It is the Fibonacci 's suit.

u_1=5\\u_2=4\\u_3=u_1+u_2=5+4=9\\u_4=u_2+u_3=4+9=13\\u_5=u_3+u_4=9+13=22\\u_6=13+22=35\\u_7=22+35=57\\u_8=35+57=92\\u_9=57+92=149\\\\\\\boxed{u_{n+2}=u_{n}+u_{n+1}}\\

8 0
3 years ago
PLEASE HELP. ITS A MINI-QUIZ / HOMEWORK AND ITS TRIANGLES.
polet [3.4K]

Answer:

76 degrees

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3 0
3 years ago
Read 2 more answers
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