The manager of a sawmill wants to find out what percentage of the boards that the mill produced are defective.
Which sampling methods are likely to be biased?
Choose all answers that are correct.
A.
The manager selects 20 boards at random each day for 5 days and examines them.
B.
The manager sends an email to 20 customers who buy lumber from the mill, asking each how many of the boards they bought the past week were defective. Results from the first 5 customers to respond are tallied.
C.
On 1 day, an hour after the sawmill begins production, 30 boards in a row are selected and examined.
D.
Every 40th board produced over the course of 1 week is selected and examined.
I think C and D am i correct ?
Answer:
I'm pretty sure it's C and D
Step-by-step explanation:
-5y=-6x+12
( , )
please help, also give a step by step on how to solve this and ill mark brainliest
Answer:
x = 7, y = 6
Step-by-step explanation:
solve for y for the first equation
2x + y = 20
-2x -2x , eliminate 2x
y = 20-2x
now that we have found y, substitute the y in for the second equation
-5y = -6x + 12
-5(20-2x) = -6x + 12, we just changed y into 20-2x. remember that we are multiplying all of 20 - 2x by -5
-100+10x = -6x + 12, we multiplied everything from the parathesis by -5
+100 + 100, eliminate -100
10x = -6x + 112
+6x +6x , eliminate 6x
16x = 112 , solve for x
x = 7
then y = 20 - 2x = 20 - 2*7 = 6
check:
2 * 7 + 6 = 20
20 = 20
-5 * 6 = -6 * 7 + 12
-30 = -42 + 12
-30 = -30
The difference between given two temperatures will be .
Temperature is the measure of hotness or coldness of something which is expressed in terms of several scales, including Fahrenheit and Celsius.
We have,
Temperature on the ground
Temperature in the air
So, the difference between temperatures Temperature in the air Temperature on the ground
The difference between temperatures
Hence, we can say that the difference between given two temperatures will be .
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The main difference is that stocks are ownership stakes while Bonds are debt.
Stocks and bonds represent two different ways for an entity to raise money to expand their operations. Stocks are simply shares of individual companies but when an entity issues a bond, it is actually issuing debt with the agreement to pay interest for the use of the money. A stock makes you an owner of a business while a bond is just a loan to a business or a person.
Answer:
Step-by-step explanation:
Bond is several atom put together