Answer:
If the walking time is greater than or equal to 38.225 hours, than it exceeds 95% probability that is lie in top 5%.
Step-by-step explanation:
We are given the following information in the question:
Mean, μ = 30 hours
Standard Deviation, σ = 5 hours
We are given that the distribution of waking time is a bell shaped distribution that is a normal distribution.
Formula:
We have to find the value of x such that the probability is 0.95
Calculation the value from standard normal z table, we have,
Thus, if the walking time is greater than or equal to 38.225 hours, than it exceeds 95% probability that is lie in top 5%.
X = -4
Y = 1
1 = -4 + 5
-4 - 5(1) = -9
Answer:
I don't know if I'm understanding your question correctly. But I'll try...
In this problem you need to remember PEMDAS!
Parentheses, Exponents, Multiplication, Division, Addition, and Subtraction.
18 + 4(28) -First you would multiply 4 by 28 since the 28 is in parentheses.
18 + 112 -Now you would add to find your answer
= 130
I hope this helps!
-Mikayla
Answer:
The last one.
Step-by-step explanation:
The measure represents the standard deviation of the sample means and is used in place of the population standard deviation when the population parameters are unknown is; t-test.
<h3>Which measure is used when the population parameters are unknown?</h3>
A hypothesis test for a population mean when In the case that the population standard deviation, σ, is unknown, carrying out a hypothesis test for the population mean is done in similarly like the population standard deviation is known. A major distinctive property is that unlike the standard normal distribution, the t-test is invoked.
Read more on t-test;
brainly.com/question/6501190
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