John runs the 400 meter dash in 50.1 seconds, what is his average speed in meters per second?

7.98403194 m / s

and i dont know how to work it out because I did it in my head

Step-by-step explanation:

From the sample of n= 200 people,

The proportion of people with kids is:

p'= 110/200= 0.55

The confidence interval for population proportion is given by:

Where P is the population proportion and Z is the critical value at a given level of significance α.