Answer:
5
Step-by-step explanation:
2-(-4)+3+(-6)-(-2)
2+4+3-6+2
5
Answer:
No. To factor the answer would be 10(2b-1)
Step-by-step explanation:
Factor 10 out of 20b − 10.
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Answer:
Ch-8 The Climate of our country
Step-by-step explanation:
Answer:
Sample mean from population A has probably more accurate estimate of its population mean than the sample mean from population B.
Step-by-step explanation:
To yield a more accurate estimate of the population mean, margin of error should be minimized.
margin of error (ME) of the mean can be calculated using the formula
ME= where
- z is the corresponding statistic in the given confidence level(z-score or t-score)
- s is the standard deviation of the sample (or of the population if it is known)
for a given confidence level, and the same standard deviation, as the sample size increases, margin of error decreases.
Thus, random sample of 50 people from population A, has smaller margin of error than the sample of 20 people from population B.
Therefore, sample mean from population A has probably more accurate estimate of its population mean than the sample mean from population B.
Pack per week = 5.2 * 52(weeks per year) = 270.4
2 packs per week = 270.4 * 2 = 540.8
pack per day = 5.2 * 365(days in year) = 1898