Answer:
Step-by-step explanation:
Answer:
95% Confidence Interval = (611.81 ppm, 696.51 ppm)
Step-by-step explanation:
The formula for Confidence Interval is given as:
Confidence Interval = Mean ± z × s /√n
Mean = the sample mean/average = 654.16
s = the sample standard deviation = 164.55
z = z score of 95% confidence interval = 1.96
Confidence Interval =
654.16 ± 1.96 × 164.55/√58
= 654.16 ± 42.348
Hence,
654.16 - 42.348
= 611.812
Approximately to two decimal places = 611.81 ppm
654.16 + 42.348
= 696.508
Approximately to two decimal places = 696.51 ppm
Therefore, the 95% (two-sided) confidence interval for true average CO2 level in the population of all homes from which the sample was selected is (611.81 ppm, 696.51 ppm).
Answer: 24
Step-by-step explanation: 4*12=48 and 8*3=24 then subtract 24 from 48 and you get 24
30 mins = 42 cupcakes
1 min = 42 ÷ 30
1 min = 1.4 cupcakes.
------------------------------------------------------------------------------------
Answer: The baker can decorate 1.4 cupcakes per minute.
------------------------------------------------------------------------------------
Answer:
A) x = -3
Step-by-step explanation:
|3(-3) + 9| = 0
|-9 + 9| = 0
|0| = 0
0 = 0
