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babymother [125]
3 years ago
7

A random sample of 7 fields of durum wheat has a mean yield of 29.8 bushels per acre and standard deviation of 3.62 bushels per

acre. Determine the 99% confidence interval for the true mean yield. Assume the population is approximately normal.
Find the critical value that should be used in constructing the confidence interval. Round your answer to three decimal places.
Mathematics
1 answer:
meriva3 years ago
5 0

Answer:

CI = 29.8 ± 3.53

Critical value is z = 2.58

Step-by-step explanation:

First of all let's find margin of error. It is given by the formula;

ME = zσ/√n

We are given;

Standard deviation; σ = 3.62

Sample size; n = 7

Mean; x¯ = 29.8

Now, z-value for 99% Confidence level is 2.58

Thus;

ME = (2.58 × 3.62)/√7

ME = 3.53

CI is written as;

CI = x¯ ± ME

CI = 29.8 ± 3.53

Critical value is z = 2.58

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Answer:

SA = 4.91 in²

Step-by-step explanation:

A ball is a sphere, and the surface area of a sphere is

SA=4\pi r^2

If our diameter is 1.25, the radius is half of that at r = .625

Filling in, we have

SA = 4(3.14)(.625)² and

SA = 4(3.14)(.390625) so

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3 years ago
I you borrow 500 for 4 years at an annual interest rate of 6% HOW MUCH WILL YOU PAY altogether ​
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Answer:

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3 years ago
Two fair dice are tossed.
poizon [28]

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6/36 = 1/6 = .1666...

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What is the probability that you roll "doubles" that is, both dice have the same number on the upper face?

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6/36 = 1/6 = .1666...

What is the probability that both dice show an odd number?

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3 years ago
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lakkis [162]
The answer is D. (1,7)
8 0
2 years ago
I don’t get this at all I need the answers??
nexus9112 [7]

Answer:

B=1/10,10%,0.10

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Step-by-step explanation:

7 0
3 years ago
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