Complete question:
Assume that different groups of couples use a particular method of gender selection and each couple gives birth to one baby this mention is designed to increase the likelihood that each baby will be a girl, but assume that the method has no effect so the probability of a girl is 0.5. Assume that the group consists of 36 couples.
A) Find the mean and standard deviation for the number of girls in groups of 36 births.
B) Use the range rule of thumb to find the values separating results that are significantly low and significantly high.
C) Is the result of 33 girls significantly high? A result of 33 girls would suggest the method is effective or is not effective?
Answer:
a) mean = 18
Standard deviation =3
b) low range = 12
High range = 24
c) The result of 33 girls is significantly high. Yes, the method is effective.
Step-by-step explanation:
Given:
p = 0.5
n = 36
a) The mean is the product of n and p
Mean u = np
u = 36 * 0.5 = 18
The standard deviation is the square root of the product of n and p&q.
S.d ó = 


b) To find the range rule of thumb:
• For low range
Low range = u - 2ó
= 18 - (2 * 3)
= 12
• High range
= u + 2ó
= 18 + (2*3)
= 24
c) The result is significantly high, because 33 is greater than 24 girls.
A result of 33 girls would prove the method as effective.
Answer:......................................................
Step-by-step explanation:
Answer:
<em>Alma needs $35.28 to purchase the lace for her pillow.</em>
Step-by-step explanation:
If it is a square, the length and the width would be the same. You have to take the square root of the area, so the square root of 324 is 18. Now, we know that the length is 18 cm and the width is also 18 cm. If she's selling every 2 centimeters for 98 cents, you have to find the total amount of centimeters the pillow has, so 18*4 (the 4 comes from the number of sides on the pillow)=72.
Now divide that answer by the 2 lace centimeters she will get. (72/2=36 cm).
Now multiply that by 98 cents, the cost. (36*0.98=35.28).
So Alma needs $35.28 to purchase the lace for her pillow.
Answer:
Step-by-step explanation:
The slope is 1/4
y intercept is (0,5)
Plot points (-20,0) and (0,5)
Forgot to add y= -25/2x+125
Answer:
Hello it is a reduction because it is smaller then the original shape and the green shape is the dilation!
Its a scale factor of 1/2 Hope this helps!