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:
Answer: Our required answer is
Step-by-step explanation:
Since we have given that
22c + 33d.
We have to use "Distributive property" to factor out the greatest common factor.
Since we know that 11 is the greatest common factor of 22 and 33.
So, it becomes,
Hence, our required answer is
Answer:
11 (2c+3d)
Step-by-step explanation:
Got answer from khan academy
Explicit rule formula: a(n) = a · rⁿ⁻¹
a(n) = ⁿth term
a = first term
r = common ratio
ⁿ⁻¹ = the previous term
In the recursive rule a₁ = 2/3; aₙ = 9 · aₙ₋₁ the first term is 2/3 and the common ration is 9. We can fill in the explicit formula with what we know.
Thus, the correct answer is [ aₙ = 2/3 · 9ⁿ⁻¹ ]
Best of Luck!
Answer:
Step-by-step explanation:
a1 = 2/3
an = 9*a(n-1)
a2 = 9 *a1 = 9* 2/3
a3 =9*a2 = 9 *(9*2/3) = 9²*2/3
a4 = 9*a3 = 9* (9²*2/3) = 9³*2/3
The peaches weigh 18 more ounces than kiwis.
Multiplication or division by a numerical factor, selection of the correct number of significant figures, and unit conversion are all steps in a multi-step procedure.
Given that Steve buys 14 ounces of kiwis and 2 pounds of peaches. The weight will be compared as follows:-
It is known that one pound is equal to 16 ounces.
1pound= 16 ounces
Steve bought two pounds of peaches,
16 x 2= 32
2 pounds = 32 ounces, now subtract that by 14.
32 - 14 = 18 Ounces
Therefore, the peaches weigh 18 more ounces than kiwis.
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