Solve −163 = −25d .
1 answer:
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Answer: x=-6
Step-by-step explanation:
Let's solve your equation step-by-step.
2(9−x)=3(x+16)
Step 1: Simplify both sides of the equation by distribution
Step 2: Subtract 3x from both sides.
Step 3: Subtract 18 from both sides.
Step 4: Divide both sides by -5.
Using the t-distribution, the 90% confidence interval for the mean number of absences is given by: (9.22, 11.60).
<h3>What is a t-distribution confidence interval?</h3>The confidence interval is:
In which:
is the sample mean.
- t is the critical value.
- n is the sample size.
- s is the standard deviation for the sample.
The critical value, using a t-distribution calculator, for a two-tailed 90% confidence interval, with 28 - 1 = 27 df, is t = 1.7033.
Researching this problem on the internet, the parameters are given by:
.
Hence the bounds of the interval are given by:
The 90% confidence interval for the mean number of absences is given by: (9.22, 11.60).
More can be learned about the t-distribution at brainly.com/question/16162795
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