Answer:
Step-by-step explanation:
Given that Student scores on exams given by a certain instruc-tor have mean 74 and standard deviation 14.
Group I X Group II Y
Sample mean 74 74
n 25 64
Std error (14/sqrtn) 2.8 1.75
a) P(X>80) =
b) P(Y>80) = 
c) X-Y is Normal with mean = 0 and std deviation = 
P(X-Y>2.2) = 
d) 
Answer:
<h3>sum of 5 times of x and thrice of y is 106</h3>

Answer:
check all below
Step-by-step explanation:
#1
1/6)^3
1/26 so answer 1 on number one
#2 what the heck is this 65+75= 140 not 120
65/120 = 54.16666% * 12600 = 6825 so 3
or 65/140 = 46.428% * 12600 = 5850
#3 number 4 makes the most since sense you get the WHOLE POPULATION
#4 1/5*1/2 or 1/10 = .10 * 100% = 10% or 3
#5
6+2+8+4 = 20
2 red marbles
2/20 = 1/10 = .10 * 100% = 10% or 2
Answer:
The estimate of the percentage of millionaires in each of these cities:
Bridgeport San Jose Washington Lexington Park
CT CA D.C. MD
Percentage of
Millionaires 9% 12% 9% 8.3%
Step-by-step explanation:
Data and Calculations: City
Bridgeport, San Jose, Washington, Lexington Park,
Millionaire CT CA D.C. MD
Yes 45 36 36 33
No 455 264 364 367
Sample 500 300 400 400
Percentage of
Millionaires 45/500 36/300 36/400 33/400
= 0.09 0.12 0.09 0.0825
= 9% 12% 9% 8.3%
Answer:
30 mm
Step-by-step explanation:
There are 4 sides to this parallelogram. Two of the sides have 3 mm as the length and the other two have 12 mm.
2 (3 mm) + 2 (12 mm)
= 6 mm + 24 mm
= 30 mm