How to do an angle of impact
1 answer:
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We have a sample of 28 data points. The sample mean is 30.0 and the sample standard deviation is 2.40. The confidence level required is 98%. Then, we calculate α by:
The confidence interval for the population mean, given the sample mean μ and the sample standard deviation σ, can be calculated as:
Where n is the sample size, and Z is the z-score for 1 - α/2. Using the known values:
Where (from tables):
Finally, the interval at 98% confidence level is:
The answer is in the image. Good luck!
Answer:
3.
Step-by-step explanation:
I think your question missed key information, allow me to add in and hope it will fit the orginal one. Please have a look at the attached photo
My answer;
We use oder of operation to solve this question
We have BEDMAS, which means:
- B - Brackets
- E - Exponents
- D - Division
- M - Multiplication
- A - Addition
- S - Subtraction
In 4 answer, only answer is correct:
= (3*25 +4)
= (79 + 4)
= *83
= 8*83
= 664
