Answer:
x=4
Step-by-step explanation:
Answer:

Step-by-step explanation:
Answer:
5 and 6
Step-by-step explanation:
Use the next formula to find the margin or error:

z is the critical value (For a 95% confidence level the z-score is 1.95998)
σ is the standard deviation
n is the sample size

<h2>Then the margin of error is: 6.6639</h2>