Two owners of a cattle ranch, Jo and Val, want to find the average weight for the ranch’s 200 cows. Instead of weighing all of the cows:

Jo weighs 25 cows and gets an average weight of 1,350 pounds (stdev 50)

Val weighs 100 cows and gets an average weight of 1,420 pounds (stdev 50)

What is Jo’s margin of error, rounded to the nearest whole number? (The formula is

10

20

50

529

Jo's margin of error is M = 20

Step-by-step explanation:

The margin of error can be calculated as:

M = z*σ/√n

where:

z depends on the confidence interval with we are working, let's use 95%, so z = 1.96

σ = standard deviation = 50

n = number of the sample.

So for Jo we have:

M = 1.96*50/√25 = 1.96*50/5 = 1.96*10 = 19.6

So if we round it to the nearest whole number, we should round up, and we get:

M = 20

in problems involving proportions, we can use cross products to test whether two ratios are equal and form a proportion. to find the cross products of a proportion, we multiply the outer terms, called the extremes, and the middle terms, called the means.

hope it

.there can be infinite values of m and n that can satisfy the above equation. for each value of m of m or n. there maybe infinite sets of solution for the above

step-by-step explanation: