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假设两变量为线性关系，计算下列各种情况的相关时，应用什么方法？（1）两列变量是等距或等比的数据且均为正态分布；

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假设两变量为线性关系，计算下列各种情况的相关时，应用什么方法？两列变量是等距或等比的数据但不为正态分布；

假设两变量为线性关系，计算下列各种情况的相关时，应用什么方法？一变量为正态等距变量，另一列变量也为正态变量，但人为分为两类；

假设两变量为线性关系，计算下列各种情况的相关时，应用什么方法？两列变量均以等级表示。

Decide whether the following statements are true or false .Being physically active can make you feel better about your body. Why? Because it will help energize you and keep your body working just the way it should. Watching TV and playing computer games can be fun, but it doesn’t do much for your body because your body stays still.When you move your body—by playing, dancing, participating in sports, or even cleaning your room—you exercise your muscles. When you have strong muscles, you can do many things, from carrying heavy backpacks to kicking a ball into the soccer net.You will feel better when you feel strong and know that your body can do whatever you want it to do. So climb a hill, jump rope, ride a bike, swim, run up the stairs, or even do the hula—enjoy all that your body can do!You can exercise your muscles in the following ways:1.playing;

A. 对
B. 错