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nataly862011 [7]
4 years ago
13

I need help with this question

Mathematics
1 answer:
Dominik [7]4 years ago
6 0
What question ? i will be happy to help.
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Suppose a researcher is testing a new vaccine on mice to see how well it prevents the flu virus. The lab has 1000 mice available
AfilCa [17]

Solution :

Sampling may be defined as the technique of selecting the individual members or the subset of the population to make a statistical inferences and estimates the characteristics of the entire population.

There are several sampling methods. This includes : Systematic sampling, clustered sampling, stratified sampling, quota sampling, judgement sampling, random sampling, convenience sampling and many more.

In the context, the sampling methods for each of the descriptions are :

a). The researcher use computer program to randomly choose a sample of 30 mice of the 1000 mice for using her study

   --- Simple Random

b). The researcher chose the 1st 30 mice as she can reach the door to the mouse room

   --- Convenience sampling

c). The mice those whose are kept in the cages on 10 various shelves in mouse room. The researcher or the experimenter chose the three mice from each shelve.

  ---- Stratified sampling

d). Each of the cage have 5 mice and the researcher randomly chooses 6 cages for her study

----- Cluster sampling

e). The researcher generates the list of the identification numbers which has been sorted from the smallest to the largest. The researcher randomly picks 1 mouse form the list and selects every 4 mouse until the researcher has 30 mice.

 ---- Systematic sampling

7 0
3 years ago
Find the first five terms of the geometric sequence a1=0.3,an=10an-1
rewona [7]

Answer:

{0.3, 3, 30, 300, 3000}

Step-by-step explanation:

Here a(1) = 0.3, and

        a(2) = 3, and

         a(3) = 30, and

          a(4) = 300, and

          a(5) = 3000

The first term (given) is 0.3, and the common ratio is 10.

7 0
4 years ago
Please help me with this
Eduardwww [97]

Answer:

r^{6}

Step-by-step explanation:

Using the rule of exponents

\frac{a^{m} }{a^{n} } = a^{(m-n)} , then

\frac{r^{9} }{r^{3} } = r^{(9-3)} = r^{6}

5 0
3 years ago
Nicolas has $650 to deposit into two different savings accounts. • Nicolas will deposit $400 into Account I, which earns 3.5% an
OLga [1]

account 1:

$400 * 0.035 * 2 = $28

$28 interest earned so total = $400 + $28 = $428

account 2:

<span>A = P(1+r/n)^(nt)</span>

= $250(1+0.035)^2 = 267.50

total account 1 and account 2 =

$428 + $267.81 = $695.50

answer is B $695.00


4 0
3 years ago
Help me please: tan3x-tanx-1=0<br><br><br><br>​
klasskru [66]

Answer: x=0.30714\dots +\pi n

Step-by-step explanation:

\Rightarrow \tan3x-\tan x-1=0\\\\\Rightarrow \dfrac{3\tan x-\tan ^3x}{1-3\tan ^2x}-\tan x-1=0\\\\\Rightarrow 3\tan x-\tan ^3x+( 1-3\tan ^2x)(-1-\tan x)=0\\\Rightarrow 3\tan x-\tan ^3x-1-\tan x+3\tan ^2x+3\tan ^3 x=0\\\Rightarrow 2\tan ^3x+3\tan ^2x+2\tan x-1=0\\\Rightarrow \tan \left(x\right)\approx \:0.31718

5 0
3 years ago
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