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ELEN [110]
3 years ago
5

A certain process for removing copper from copper bearing ore had been in use for a period of time, and it is known that this pr

ocess removes 36 pounds per ton on average. A new process that is supposed to increase the recovered amount is being tested. In a simple random sample of 100 batches of ore, an average of 42 pounds per ton were recovered using the new process. The population of interest in the study is: a. The increase of 6 pounds per ton. b. The miners working with the ore. c. The 100 batches tested. d. Ore treated with the new process. e. Ore treated with the old process
Mathematics
1 answer:
Anika [276]3 years ago
5 0

Answer:

d. Ore treated with the new process.

Step-by-step explanation:

This is a common practice in statistics, in which we use a sample of a population to infer something about the entire population. We should use a sample of 100.

For example, if we want to know the proportion of residents of Buffalo, New York, who are Bills fans, we are going to take a sample of like, 100 residents, and then use this to estimate for the entire city.

In this problem, we have that:

A new process that is supposed to increase the recovered amount is being tested. In a simple random sample of 100 batches of ore, an average of 42 pounds per ton were recovered using the new process.

So the population of interest is the ore treated with new process. We use a sample of 100 to gather information about the entire population.

So the correct answer is:

d. Ore treated with the new process.

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What term best describes the graph of y=-2
sesenic [268]

Answer:

It would be constant.

Step-by-step explanation:

Since there is no x value, the line will have no slope and just be horizontal about y= -2.

6 0
2 years ago
julian's height is 7 inches less than his sisters his sister's is unknown what is julian's height use x for his sister's height
Marat540 [252]

Answer:

x - 7

Step-by-step explanation:

Because Julian is 7 inches shorter than his sister, and his sister's height is x, if we subtract 7 from x, we get Julian's height, x - 7.

7 0
2 years ago
Read 2 more answers
Madison’s band used to practice for 50 minutes every Tuesday. Now they practice 130% as many minutes as they used to. How many m
yKpoI14uk [10]

Answer:

it is 65 :)

Step-by-step explanation:

3 0
3 years ago
Rewrite each of the following sentences using logical connectives. Assume that each symbol!, x₀, n, x, B represents some fixed o
katrin [286]

Answer:

a) (f\  has\  a\  relative \ minimum \ at\  x_{0} ) ∧ (f\ is\ differenciable\ at\ x_{0} ) ⇒ f^{'} (x_{0} )=0.

b) (n\ is\ prime) ⇒ (n=2) ∨ (n\  is \ odd).

c) R\ is \ irreflexive\ ⇒ (R\ is\ symmetric) ∧ (R\ is\ transitive).

d) detB=0 ⇒ (B \ is\ square) ∧ (B\ is\ not\ invertible).

e) f\ has\ a\ critical\ point\ at \ x_{0} ⇔ (f^{'}(x_{0})=0) ∨ () \ f^{'}(x_{0}) \ does\ not\ exist.

f) 2n ∨ n>4 ⇒ 2.

g) 6\geq n-3 ⇔ n>4 ∨ n>10.

h) x \ is \ cauchy ⇒ x\ is\ convergent.

i) \lim_{x \to \ x_{0}} f(x)=f(x_{0}) ⇒ f\ is\ continous\  at \ x_{0}.

j) (f\ is\ diferenciable\ at\ x_{0}) ∧ (f\ is\ increasing\ at\ x_{0}) ⇒ f^{'}(x_{0})>0.

8 0
3 years ago
Find the measure of angel 3
Elena-2011 [213]

Answer:

100

Step-by-step explanation:

Remark

If two opposite arcs are given by being opposite vertically opposite angles, then the value of both the vertically opposite angles are equal to

Vertically opposite angle = 1/2 (arc1 + arc2)

Givens

Arc1 = 60

Arc2 = 100

Solution

The red dot angle = 1/2 (60 + 100)

The red dot angle = 1/2(160)

The red dot angle = 80

Because the red dot angle and <3 are on the same line with the same common point, they are supplementary.

<3 and red dot = 180

<3 + 80 = 180                          Subtract 80 from both sides

<3 = 180 - 80

<3 = 100

8 0
3 years ago
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