Answer:
the first is 70 and the second is 140
Step-by-step explanation:
Answer:
-1/4
Step-by-step explanation:
2-1 over -3-1 = 1/-4
Answer: n = 14
Step-by-step explanation: margin of error = critical value × σ/√n
Where σ = population standard deviation = 1
n = sample size = ?
We are to construct a 99% confidence interval, hence the level of significance is 1%.
The critical value for 2 tailed test at 1% level of significance is gotten from a standard normal distribution table which is 2.58
Margin of error = 0.7
0.7 = 2.58×1/√n
0.7 = 2.58/√n
By cross multipying
0.7×√n = 2.58
By squaring both sides
0.7^2 × n = 2.58^2
0.49 × n = 6.6564
n = 6.6564/0.49
n = 14
-.1666667
You can use khan academy or Socratic if you still not sure.
Answer:
You will need 34 square feet of carpet
