Do people walk faster in an airport when they are departing (getting on a plane) or after they have arrived (getting off a plane)? an interested passenger watched a random sample of people departing and a random sample of people arriving and measured the walking speed (in feet per minute) of each. what type of study design is being performed?

Observational study

Explanation:

An observational study is one in which the researcher draws inferences from a sample to a population, but where the independent variable is not under the control of the researcher. This can occur for various reasons, but most often, it is the result of logistics or ethical concerns. In this example, the researcher cannot manipulate the way people operate. He cannot divide them into groups nor can he have a control group. However, he can overcome these problems in logistics by simply observing their behaviour.

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question- which is one way that muslims scholars contributed to the scientific recolution?

answer- well you see in the religion islam the religion muslims practice there was the prophet muahmmed peace be upon him who did good things such as sit in a sertian posotion to use the toilet which then the scientist of this generation later found that it was good for you there are many more things like this.

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b. the american revolution