The 90% , 99% confidence interval for the population mean is 32.145 < < 35.855 and 31.093 < < 36.907
<h3>What is Probability ?</h3>
Probability is the study of likeliness of an event to happen.
It is given that
Total Population = 50
Mean = 35
The confidence interval is given by
is the mean
z is the confidence level value
s is the standard deviation
n is the population width
(a) The 90% confidence interval for the population mean
90% = 0.05
Z = 1.64
34 1.64 * 8 / √50
34 1.855
32.145 < < 35.855
(b) The 99% confidence interval for the population mean
99% = 0.005
Z=2.57
34 2.57 * 8 / √50
34 2.907
31.093 < < 36.907
Therefore the confidence interval for population mean has been determined.
The complete question is
A simple random sample of 50 items from a population width =7 resulted in a sample mean of 35. If required, round your answers to two decimal places.
a. Provide a 90% confidence interval for the population mean
b. Provide a 99% confidence interval for the population mean
To know more about Probability
brainly.com/question/11234923
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The distributive property combines multiplication and addition.
It uses multiplication to combine the simple numbers with addition.
An example is that if we wanted to multiply 15 and 12, we can multiple 15 and 10 and 15 and 2 and then we add them.
Answer:
Step-by-step explanation:
∠BEC is supplementary with ∠BEA
<u>Find the measure of ∠BEA</u>
- m∠BEA = 1/2(mCD + mAB)
- m∠BEA = 1/2(120° + 100°) = 110°
<u>Supplementary angles sum to 180°</u>
- m∠BEC + m∠BEA = 180°
- m∠BEC = 180° - 110° = 70°
Correct choice is D
Answer:
√89 or 9.43
Step-by-step explanation:
√(x₂ - x₁)² + (y₂ - y₁)²
√(-3 - 2)² + (-10 - (-2))²
√(-5)² + (-10 + 2)²
√25 + -8²
√25 + 64
√89
3 1/4
I think, I’m not sure