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3 years ago

Identify the type of sample and whether it is a biased or unbiased sampling method.

Mathematics

1 answer:

iris [78.8K]3 years ago

4 0

Answer:

1. biased

2. unbiased

3. unbiased

4. biased

5. unbiased

Step-by-step explanation:

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If The 3rd term of an A.S is and 5th term is . What is an A.P?

Bad White [126]

Question:

If The 3rd term of an A.S 23 is and 5th term is 15 .P What is an A.?

Answer:

A.P is 31, 27, 23 ,19, 15, 11, 7, 3

Step-by-step explanation:

Given:

3rd term = 23

5th term = 15

To Find:

The arithmetic Progression = ?

Solution:

Let

$a_1$ be the first term and d be difference

Then the arithmetic progression will be ,

$a_1 , (a_1+d),(a_1 +2d),......(a_1+(n-1)d)$

From the question ,

third term = 13

$(a_1 +2d) = 23$ -------------(1)

Similarly

$(a_1 +4d) = 15$ -----------------(2)

Subtracting (1) from (2) we get

-2d =8

$d = \frac{8}{2}$

d = -4

Substituting d = 4 in equation 1, we get

$(a_1 +2(-4)) = 23$

$(a_1 -8) = 23$

$a_1 = 23 +8$

$a_1 = 31$

$a_1 , (a_1+d),(a_1 +2d),......(a_1+(n-1)d)$

= 31 ,(31 +(-4)) ,(31 +2(-4)), (31+3(-4)).........

=> 31, 27, 23 , 19, 15, 11,7,3

3 0

4 years ago

If i stands for income and e stands for expenses, what is the formula for p, profits?

Zarrin [17]

Profit is calculated by subtracting the expenses from the income. So:
p = i - e

3 0

3 years ago

Is 22+ 32 = 42 a true statement? Explain.

ivolga24 [154]

No, this is not true, 22+32 =54 this is not a true statement

4 0

4 years ago

Marlow is comparing the prices of two truck rental companies. Company A charges $3 per hour and an additional $75 as service cha

vichka [17]

[Part A]

company A                company B
A=3h+75                    B=2h+85

definition of variables
A=company A
B=company B
h=number of hours used

[Part B]
company A would charge less for 5 hours

justification
company A                 company B
A=3(5)+75                   B=2(5)+85
A=15+75                     B=10+85
A=90                           B=90

[Part C]
By using the services of company A instead of company B to rent a truck for three hours you save 7 dollars.
company A: A=3(3)+75 = 9+75= 84
company B: B=2(3)+85 = 6+85 = 91
difference: 91-84= 7

6 0

3 years ago

Read 2 more answers

katelyn owns 140 shares of a stock that sells for $39 a share before a 3-for-2 split is announced. After the split, how many sha

____ [38]

Answer: Katelyn will have 210 shares that worth for $26 a share.

Step-by-step explanation:

After a 3-for-2 stock split, Katelyn will have three shares for every two shares you used to own.

Since, Initially, Katelyn owns 140 shares of a stock

Therefore, New number of shares Katelyn has = 140 × 3/2 = 210

And, Since, initially one share cost = $ 39

Therefore, After 3-for-2 stock split, the price of the shares = $\frac{39}{3/2}$ = 26

Thus, They will worth $26 a share.

3 0

4 years ago