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Butoxors [25]
3 years ago
5

A scientist is conducting research to see whether dogs or cats are more popular. He goes to a dog park and asks all of the owner

s which pet they prefer. 100% of those polled stated that dogs are their favorite animal.
This experiment is an example of:
A) personal bias
B) experimental bias <<<<
C) cultural bias<<<<
D) a controlled experiment

PLEASE CHECK
Biology
1 answer:
Flura [38]3 years ago
7 0

Answer:

It is a controlled experiment. (D)

Explanation:

The reason why is because a scientist went to a dog park to conduct the experiment, there would be no cat owners there so obviously everyone would choose dogs because that is their pet. The scientist ran a controlled experiment.

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Natali [406]

Answer:

2.275% of this population has a diastolic blood pressure less than 60 mmHg

Explanation:

Hello!

Yo have the distribution of the diastolic blood pressure in a certain population. Be X: diastolic blood pressure of an individual, X~N(μ;δ²)

Where

μ= 82mmHg

δ=11 mmHg

You need to calculate the probability of an individual of this population having less than 60mmHg diastolic blood pressure.

Symbolically:

P(X<60)

To obtain the value of probability you need to standardize the value of diastolic pressure so that you can obtain it from the standard normal distribution. The way to standardize the value is to subtract the mean and divide by the standard deviation

Z= (X-μ)/δ~N(0;1)

P(Z<(60-82)/11)

P(Z<-2)= 0.02275

I hope it helps!

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