题干

为了了解某班同学的身高情况,随机抽取其中10位同学,量得他们的身高(单位:cm)如下 :
148,,150,150,151,152,152,152,153,154,158
这组数据的众数是多少?中位数是多少?平均数是多少?

上一题 下一题 0.0难度 选择题 更新时间:2017-02-24 10:12:07

答案(点此获取答案解析)

解:(1)出现次数最多的是152,所以众数是152cm.
本次调查的学生共10人,即得到10个数据,将这些数据按从小到大的顺序排列得到中间那个数即第5和第6个数的平均值是152,所以中位数是152cm;
(2)平均数=(148+150×2+151+152×3++153+154+158)÷10=152,
所以平均数是152cm;
(3)这组数据的身高趋势在152cm左右.

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    Living a more simple life can improve how we think, feel and move around in the world. Here are ways to simplify your life while creating space for happiness.

    Give up your negative thoughts. As humans, we spend a lot of our time being caught up in negative thoughts that brings nothing good into our lives.____ They can grow rapidly and cause unhappiness and do nothing to improve our quality of life.

    Reduce the amount of screen time____ While watching TV and endless YouTube videos or playing computer games can be a nice way to relax, too much can have a negative influence on your lives.

    Cut down on social media____ They say they feel less confident after comparing their lives against those of their online friends. So simplify your life by cutting down on social media-not only for your own health of mind but to stop the endless checking every several minutes.

    ____ In the effort to make yourselves better people and improve yourselves, you often set goals but having too many goals can prevent you from achieving them.

    Eat Fewer Unhealthy Foods____Cutting down on bad foods will not only help you feel much better and give you more energy.

A. Reduce the number of your goals.

B. Negative thoughts are much dangerous.

C. Many people feel their lives are worsened by it.

D. You can make your own healthy food and tasty meals.

E. Learn to choose to think and see the positives in life.

F. Make an effort to remove some unhealthy foods from your diet

G. We spend so much time either staring at a computer or the TV.