Acoach wants to see how long the members of the water polo team can hold their breath. he times each member and finds that the average is 45 seconds. what type of study is this? experiment observational study randomized trial double-blind study

Observational study

Step-by-step explanation:

In an experiment, one group is given a treatment and one group is a control group.  There is only one group here; this is not an experiment.

A randomized trial involves some sort of random selection of participants; there is no randomization here, so this is not a randomized trial.

In a double-blind study, neither the participants nor the researcher are aware of the participants in the study; this is not a double-blind study.

The coach observes the amount of time the members of the team can hold their breath.  This is an observational study.

the most boring thing ever written

step-by-step explanation:

i am writing something. yes, i plan to make it the most boring thing ever written. i go to the store. a car is parked. many cars are parked or moving. some are blue. some are tan. they have windows. in the store, there are items for sale. these include such things as soap, detergent, magazines, and lettuce. you can enhance your life with these products. soap can be used for bathing, be it in a bathtub or in a shower. apply the soap to your body and rinse. detergent is used to wash clothes. place your dirty clothes into a washing machine and add some detergent as directed on the box. select the appropriate settings on your washing machine and you should be ready to begin. magazines are stapled reading material made with glossy paper, and they cover a wide variety of topics, ranging from news and politics to business and stock market information. some magazines are concerned with more recreational topics, like sports card collecting or different kinds of hairstyles. lettuce is a vegetable.