what is the probability of seeing a sample mean for 21 observations less or equal to the sample mean that we observed

Step-by-step explanation:

The missing parameters are:

--- population

--- population mean

-- population standard deviation

Required

First, calculate the sample standard deviation

Next, calculate the sample mean

So:

So, we have:

Calculate the z score

So, we have:

From the z table

So:

45.36 feet per second.

step-by-step explanation:

to find the most accurate determination for the number of feet per second tyrone traveled on his way to work let us convert miles to feet and minutes to seconds.

1 mile = 5280 feet.

1 minute = 60 seconds.

now we will divide 158400 by 3492 to find the most accurate determination for the number of feet per second tyrone traveled on his way to work.

therefore, tyrone traveled on his way to work at the rate of 45.36 feet per second.