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Elanso [62]
3 years ago
8

A random sample of size n1 = 16 is selected from a normal population with a mean of 75 and standard deviation of 8. A second ran

dom sample of size n2 = 9 is taken independently from another normal population with mean 70 and standard deviation of 12. Let X1 and X2 be the two sample means. Find
(a) The probability that X1 − X2 exceeds 4.
(b) The probability that 3.5 < X1 − X2 < 5.5.

Mathematics
1 answer:
gavmur [86]3 years ago
4 0

Answer:

the answer is in the attached image below

Step-by-step explanation:

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Review
Ahat [919]

Answer:  \bold{a)\quad 51, 54, 57\qquad a_n=a_{n-1}+3}

               \bold{b)\quad 250, 625, 1562.5\qquad a_n=(2.5)a_{n-1}}

<u>Step-by-step explanation:</u>

a) This is an arithmetic sequence where 3 is added to the previous term.

48 + 3 = 51

              51 + 3 = 54

                            54 + 3 = 57

The recursive formula for this sequence is:  a_n = a_{n-1}+3

*****************************************************************************************

b) This is a geometric sequence where 2.5 is multiplied to the previous term.

100(2.5) = 250

                250 (2.5) = 625

                                    625(2.5) = 1562.5

The recursive formula for this sequence is: a_n=(2.5)a_{n-1}

5 0
2 years ago
Which number from the set (0,2,4,6) makes it true<br><br> 7x - 3 + 4x =19<br> PLsss I NEED IT NOW
Ira Lisetskai [31]
Just put these values in the place of x and solve!
The answer is 2 btw
7 0
2 years ago
What’s the slope for (3,8)and (5,0)
Effectus [21]

Answer:

slope = -4

Step-by-step explanation:

(y - y1)/(x -x1)

= ( 0 -8)/(5-3)

= -4

7 0
2 years ago
Read 2 more answers
Consider the following geometric sequence.<br><br> 2, 6, 18, 54,
Kaylis [27]

Answer:

The rule or operation in this sequence is multiplication by 3.

Step-by-step explanation:

2*3=6

6*3=18

18*3=54

and so on...

7 0
2 years ago
What number is 1/5 of another number the sum of the two numbers is six find the two numbers
Oliga [24]

Answer:

the two numbers are 3 and 3.

1/5 of 3 is 0.6

1/5 of 6 is 1.2

Step-by-step explanation:

3 + 3 = 6

(1/5)3 = 0.6

(1/5)6 = 1.2

8 0
2 years ago
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