Answer:
0.0266, 0.9997,0.7856
Step-by-step explanation:
Given that the IQs of university​ A's students can be described by a normal model with mean 140 and standard deviation 8 points. Also suppose that IQs of students from university B can be described by a normal model with mean 120 and standard deviation 11. Let x be the score by A students and Y the score of B.
A)
B) Since X and Y are independent we have
X-Y is Normal with mean = 140-120 =20 and
C) For a group of 3, average has std deviation =
Answer:
y =84
Step-by-step explanation:
25/100*Y = 21
100/25 * 25y/100 =21 *100/25
y = 2100/25
y = 84
Answer:
x = 7/4
Step-by-step explanation:
Substitue for y
3x + x + 5 = 12
4x + 5 = 12
4x = 7
x = 7/4
The critical values are 0.622, 0.707, 0.789 and 0.834
<h3>How to determine the critical values?</h3>
The sample size is given as:
n = 8
Calculate the degrees of freedom using
df = n - 2
So, we have:
df = 8 - 2
df = 6
Using the table of values of critical values, we have:
Critical values = 0.622, 0.707, 0.789 and 0.834
By comparing the critical values and the linear correlation coefficient, we can conclude that there is no significant linear correlation.
Read more about linear correlation at:
brainly.com/question/17237825
#SPJ1
<h3>The recursive formula for this geometric sequence is:</h3>
<em><u>Solution:</u></em>
Given that,
-4, -24, -144, -864
To find: recursive formula for geometric sequence
Find the common ratio "r"
<em><u>The nth term of geometric sequence is given as:</u></em>
Where,
n is the nth term
is the first term
r is the common ratio
From sequence,
Therefore,
Where, n = 1, 2, 3, ....
Thus the recursive formula is found