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nexus9112 [7]
3 years ago
5

Ethan is conducting an experiment to determine whether a new medication is effective in reducing sneezing. He finds 1,500 volunt

eers with sneezing issues and divides them into 2 groups. The control group does not receive any medication; the treatment group receives the medication. The patients in the treatment group show reduced signs of sneezing. What can Ethan conclude from this experiment?
Mathematics
2 answers:
Ghella [55]3 years ago
8 0
Ethan can conclude that the new medication is effective in reducing sneezing, because the group that received the new medication showed lower signs of sneezing, which was the purpose of the medication.
Andre45 [30]3 years ago
7 0

Answer:

Ethan finds 1,500 volunteers with sneezing issues and divides them into 2 groups.

The patients in the treatment group show reduced signs of sneezing.

This means the medicine is effective and patients are feeling better now. Moreover, Ethan wanted to test a hypothesis that claimed that the new medication reduces sneezing.

As it shows that the medicine reduced sneezing, so his claim or hypothesis is verified.

Hence, Ethan can conclude that the new medication is effective in reducing sneezing.

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A particular type of mouse's weights are normally distributed, with a mean of 359 grams and a standard deviation of 33 grams. If
igor_vitrenko [27]

Answer:

Following are the responses to the given points:

Step-by-step explanation:

Given:

\mu = 359 \ \ \ \ \ \sigma = 33\\\\

Using formula:

\to P(X = x) = P\left ( z < \frac{x-\mu }{\sigma } \right )

For point a:

\to x= 406\\\\P(X < 406 ) = P\left ( z < \frac{406-359 }{33 } \right )\\\\

                   = P\left ( z

For point b:

\to x= 461\\\\P(X > 461 ) = P\left ( z > \frac{461 -359 }{33 } \right )\\\\

                   = 1 - P\left ( z < 3.0909 \right )\\\\= 1 - 0.9990\\\\= 0.0001

For point c:

\to x= 406\ \ and \ \  461\\\\P(406

                              = 0.9990 - 0.9222\\\\= 0.0768\\\\

For point d:

P(X < 406) = 0.9222 = 92.22 \%\  that \ is \ greater \ than\ 50\%

Hence, the correct choice is "i".

For point e:

\to P(X > z) = 0.1\\\\\to 1 - P(X < z) = 0.1\\\\\to P(\frac{x-\mu }{\sigma }) = 0.9\\\\\to \frac{x-359}{33 } = 1.28\\\\ \to x = 401.24\\\\

5 0
3 years ago
In the following diagram, ABCD is a parallelogram. Is AC the bisector of angle BAD? Show calculations and explain
vlada-n [284]
AC is not the bisector of angle BAD. AC made both sides a triangle and every triangles angles have to add to 180 degrees. So 115+30= 145 meaning angle DAC is 35 degrees. So AC cuts through BAD but one side is 30 degrees and the other is 35(DCB and DAB are the same angle…they both have to add up to 65 degrees)
3 0
3 years ago
Read 2 more answers
What is the decibel level of a dog barking with intensity 10−5 watts per square inch? Use a logarithmic model to solve.
Vsevolod [243]

Answer:

The sound intensity is about 101.9 dB

Step-by-step explanation:

Sound intensity is the amount of sound energy per unit area.

The intensity of the dog bark is 10⁻⁵ W/in². The intensity of sound in decibels is given by:

\beta=10\ dB*log(\frac{I}{I_o} )\\\\Where\ I=Sound\ intensity\ in \ W/m^2, I_o=reference\ sound\ intensity=10^{-12}\ W/m^2\, \beta= sound\ intensity\ in\ dB

I = 10⁻⁵ W/in² = 0.0155 W/m²

Therefore:

\beta=10\ dB*log(\frac{I}{I_o} )\\\\\beta=10\ dB*log(\frac{0.0155}{10^{-12}} )\\\\\beta=101.9\ dB

The sound intensity is about 101.9 dB

5 0
3 years ago
Why do we add the opposite when subtracting integers ?
katen-ka-za [31]
Neagtive means go backwards or oposite
it takes away that many units

7 0
4 years ago
This year Benny is 12 years old . his brother lenny's age is 175% of benny's age how old is lenny
Yanka [14]
Lenny should be 21..........
7 0
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