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inna [77]
3 years ago
15

Stratified sample Choose the correct answer below. A. A stratified sample is a complete collection of items desired to be studie

d. B. A stratified sample is the result if a sampling method distorts a property of the population. C. A stratified sample is a sample within homogeneous subsets of the population. D. A stratified sample is a sample chosen so that all subsets of size n are equally likely.
Mathematics
1 answer:
SIZIF [17.4K]3 years ago
6 0

Answer:

C. A stratified sample is a sample within homogeneous subsets of the population.

Step-by-step explanation:

Stratified sample is a method of sampling in which small homogeneous subsets are formed known as strata which are used to study the whole population. These small subsets represents the whole population. This is random sampling method which is used widely. The benefit of using this sampling method is that the data is not overlapped.

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Jack likes to go fishing. While waiting for the fishes to bite, he formulates the following model for the process: fishes bite a
gogolik [260]

Answer:

a) 0.122

b) 3.35 × 10⁻⁴

c) 0.1071

Step-by-step explanation:

Here we have the Poisson process given by

P(N(t) = k) = \frac{e^{-\lambda t} (\lambda t)^k }{k!}

Where:

λ = Rate = 4 bites/hour and

t = Length of time that is

Mean = λt

Where k = 6 fishes bites and t = 2 hours we have

P(N(2) = 6) = \frac{e^{-4 \times 2} (4 \times 2)^6 }{6!} = 0.122

b) The probability that he fails to catch any fishes during the first two hours is the probability t that he catches 0 fish as follows

P(N(2) = 0) = \frac{e^{-4 \times 2} (4 \times 2)^0 }{0!} = 3.35 \times 10^{-4}

(c) Here we have

P(N(2) = 6) =  0.122

For 1 fish caught in two times we have first time no fish and second time he caches a fish gives

0.122×(1-0.122) = 0.1071

4 0
3 years ago
What is the least common denominator for 7 and 3
77julia77 [94]
21 is the least common denominator of 7 and 3
8 0
3 years ago
What is the average rate of change of f(x), represented by the graph, over the interval [-1, 1]
never [62]

The average rate of change of a continuous function, <span>f<span>(x)</span></span> , on the closed interval <span>[a,b]</span> is given by

<span><span><span>f<span>(b)</span></span>−<span>f<span>(a)</span></span></span><span>b−a</span></span>

5 0
4 years ago
8. A warehouse 25 feet tall casts a shadow that is 15 feet long. At the same time of day, how
Scilla [17]

Answer:

D

Step-by-step explanation:

8 0
3 years ago
Which symbol creates a true sentence when x equals 6?
Cloud [144]
Hi there!

To see which symbol meets the equation when x is 6, we can plug x into the equation.

7 • 6 - 3(6) ___ 5(11 - 6)

Simplify:

42 - 18 ___ 5(5)
24 ___ 25

24 < 25

Hope this helps!
7 0
4 years ago
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