95% of students at school weigh between 62 kg and 90 kg. assuming this data is normally distributed, what are the mean and standard deviation?

Mean is 76 and standard deviation is 7.

Step-by-step explanation:

Let be the mean and is the standard deviation of the given data,

Thus, 95% of the data lies between and

Now, 95% of students at school weigh between 62 kg and 90 kg,

So, the mean is,

step-by-step explanation:

which of the following statements correctly describes the expression below based on its degree and number of terms?

314 - 7x2 + 11