According to Eurostat, 55.2% of households in Italy have one child, the highest percentage in the Euro zone. A random sample of
1 answer:
Response:
0.04
Detailed explanation:
In this scenario, we will apply the following formula to determine the standard error, specifically the square root of the probability of its complement divided by the total population:
SE=
Now, given that p = 0.552 and n = 160, substituting these values leads to:
SE =
SE =
SE = 0.039
This indicates that the proportion's standard error is 0.04
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Response:
The probability that a student has a pet, given they do not have any siblings is:
Option: D ( 60%)
Step-by-step breakdown:
Let A represent the situation where a student lacks a sibling.
Let B signify the occurrence that a student has a pet.
Consequently, A∩B refers to the event in which a student is without siblings but possesses a pet.
Let P denote the chance of an event happening.
We need to determine:
P(B|A)
From our knowledge:
From the data provided:
P(A)=0.25
and P(A∩B)=0.15
Thus,
which expressed as a percentage is:
Therefore, the probability is:
60%
Response:
MAD value comes out to be 3.
Detailed Breakdown:
The given sales forecasts for the last four months are 5, 6, 11, and 12 units.
To calculate the Mean Absolute Deviation (MAD) for these forecasts:
The average of the forecasts across four months is .
Thus, the total of absolute differences between the forecast values and the average is = |5 - 8.5| + |6 - 8.5| + |11 - 8.5| + |12 - 8.5| = 3.5 + 2.5 + 2.5 + 3.5 = 12.
Hence, the MAD value will be = (Final Answer)