4 cm3 cmx cmarea = 19 cm2
2 answers:
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Answer:
She needs to sample 189 trees.
Step-by-step explanation:
We have that to find our level, that is the subtraction of 1 by the confidence interval divided by 2. So:
Now, we have to find z in the Ztable as such z has a pvalue of .
That is z with a pvalue of , so Z = 1.96.
Now, find the margin of error M as such
In which is the standard deviation of the population and n is the size of the sample.
The standard deviation of the population is 70 peaches per tree.
This means that
How many trees does she need to sample to obtain an average accurate to within 10 peaches per tree?
She needs to sample n trees.
n is found when M = 10. So
Dividing both sides by 10:
Rounding up:
She needs to sample 189 trees.
Answer:
So Average Price of horse is $360
Step-by-step explanation:
Given:
25 horses sold in January for $ 2500
25 horses sold in February for $10500
TO find:
Average price of horse = ?
Solution:
Average price is usually found out by adding all the values and dividing by its total no of values
Now in our case
Total Horse = 25 + 25
= 50
Total Money = $7500 + $10500
= $18000
Average Price
Average Price
=$360
So Average Price of horse is $360