Write two numbers that multiply to the value on top and add to the value on bottom.
2 answers:
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Answer:
c. 9.5 lb < mu < 11.1 lb.
Step-by-step explanation:
Confidence interval can be stated as M±ME where
- M is the sample mean (10.3)
- ME is the margin of error
margin of error (ME) around the mean can be calculated using the formula
ME= where
- z is the corresponding statistic in 95% confidence level (1.96)
- s is the standard deviation of the sample (2.4)
- N is the sample size (37)
Putting thesenumbers in the formula we get:
ME= ≈ 0.7733 ≈ 0.8
Then the 95% confidence interval would be 10.3 ± 0.8
Option 1. and option 4.
are equivalent to
Step-by-step explanation:
Step 1:
The given expression is expanded as follows.
The -2 is multiplied with the 5x and then the -2 is multiplied with the .
So the expression becomes as follows;
This is the first option given so the first expression is equivalent.
Step 2:
Of the other four options, only the fourth expression has the fraction so the fourth expression is also equivalent.
Expressions 1 and 4 are equivalent to the given expression.