For a normally distributed random variable x with m = 75 and s = 4, find the probability that 69 < x < 79 Use the table to
1 answer:
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Answer:
Part A) The rate is
Part B) In 1 year the tree grows 3 feet
Step-by-step explanation:
Part A) write the rate at which this tree grows as a fractions
we know that
To find out the rate at which the tree grows divide 1/4 foot by 1/12 year
so
Part B) how many feet does the tree grow in 1 year?
we know that
The tree grows at rate of
Simplify
That means ----> The tree grows 3 ft in 1 year
therefore
In 1 year the tree grows 3 feet
Answer:
1.97
Step-by-step explanation:
The null hypothesis is:
The alternate hypotesis is:
Our test statistic is:
In which X is the sample mean, is the hypothesis tested(null hypothesis),
is the standard deviation and n is the size of the sample.
In this problem, we have that:
So