What is the standard deviation of the following data set rounded to the nearest tenth? 30, 26, 28, 32, 28, 30

Standard deviation = 1.9

Step-by-step explanation:

We have to calculate the standard deviation of the following data set.

30, 26, 28, 32, 28, 30

To find standard deviation first we have to calculate the mean of the data set.

Mean =    

         =

Mean = 29

Now we subtract the mean from all units and square the result.

30 - 29 = 1² = 1

26 - 29 = -3² = 9

28 - 29 = -1² = 1

32 - 29 = 3² = 9

28 - 29 = -1² = 1

30 - 29 = 1² = 1

Now take the mean of squared result.

Mean =   = = 3.67

Now standard deviation will be the under root of mean

Standard deviation = 1.915 ≈ 1.9

answer: the answer is one of

step-by-step explanation:   we are given to write a proper fraction where the whole is divided into an even number of equal parts less than ten, and an odd number of those parts exist.

an even number less than 10 may be one of 2, 4, 6 or 8. so, the whole may be one of these four evens.

now, an odd number of these parts must exist, so the numerator must be an odd number, one of 1, 3, 5 or 7. it cannot be 9 because then the fraction will become improper.

thus, our fraction may be one of the following

x + y = 90 5x – 10y = 90 90 – 10y = 5x 90 + 10y = 5x

step-by-step explanation:

last month maria hiked the 5-mile mountain trail a number of times and she hiked the 10-mile canal trail several times. let x represent the number of times she hiked the 5-mile trail, and let y represent the number of times she hiked the 10-mile trail. if she hiked a total of 90 miles, which equation can be used to find the number of times maria hiked each trail? x + y = 90 5x – 10y = 90 90 – 10y = 5x 90 + 10y = 5x