To be honest I can tell you that 2 and 7 are right: but I am not sure about question one maybe someone else can answer well good luck in your studies I am doing statistics and man is it ever confusing but mean and standard deviation are straight foward. well good luck!

2) The following data in the sodium content (in milligrams) of 20 beef hotdogs:

495,477,425,322,482,587,370,322,479,375,330,300,38 6,401, 645, 440,317,319,298, 253

Determine the mean and standard deviation of the data:

My answer:

Mean: 401.15

Standard deviation: 99.84

correct good job

7) What is the mean and standard deviation?

Value:

4.8

5.2

5.4

5.9

6.5

6.6

Frequency:

25

21

23

17

24

25

My answer:

Mean: 5.74

Standard deviation: 0.69 correct good job