Please help me!! i need mathematicians on this post right now!!
1 answer:
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Answer:
Step-by-step explanation:
From the attached photo
mean = 15.76
Standard deviation = 1.66
c) We want to determine a 90% confidence interval for the mean growth of pea plants
For a confidence level of 90%, the corresponding z value is 1.645. This is determined from the normal distribution table.
We will apply the formula
Confidence interval
= mean ± z ×standard deviation/√n
It becomes
15.76 ± 1.645 × 1.66/√7
= 15.76 ± 1.645 × 0.63
= 15.76 ± 1.04
The lower end of the confidence interval is 15.76 - 1.04 =14.72
The upper end of the confidence interval is 15.76 + 1.04 =16.8
Here we have the following equation:
So let's follows these steps:
Step 1: Add 3x to both sides:
Step 2. Combine like terms:
Step 3. Subtract -1 from both sides:
Step 4. Divide both sides by 35:
Solving equations by graph: brainly.com/question/10643312
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