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Sagot :
To solve this problem, we need to find the mean of the sum of JT's weekly earnings from both jobs. Let's denote:
- [tex]\( \mu_X \)[/tex] as the mean of JT's weekly earnings for mowing yards.
- [tex]\( \mu_Y \)[/tex] as the mean of JT's weekly earnings for washing cars.
- [tex]\( \mu_S \)[/tex] as the mean of the total weekly earnings, where [tex]\( S = X + Y \)[/tex].
We are given:
- [tex]\( \mu_X = \$60 \)[/tex]
- [tex]\( \mu_Y = \$35 \)[/tex]
The mean of the sum [tex]\( S = X + Y \)[/tex] can be calculated by summing the individual means:
[tex]\[ \mu_S = \mu_X + \mu_Y \][/tex]
Substituting the given values:
[tex]\[ \mu_S = 60 + 35 \][/tex]
[tex]\[ \mu_S = 95 \][/tex]
Therefore, the mean of JT's total weekly earnings from both jobs is \[tex]$95. Next, we interpret this result in the context of the problem. Among the given options, the correct interpretation of the mean is: \[ \mu_5 = 95; JT can expect to earn \$[/tex] 95, on average, in a typical week. \]
This interpretation correctly describes the mean as an expected average earnings per week, rather than a guaranteed amount for a specific upcoming week.
So, the correct answer choice is:
[tex]\[ \mu_5=95; JT can expect to earn \$ 95, on average, in a typical week. \][/tex]
- [tex]\( \mu_X \)[/tex] as the mean of JT's weekly earnings for mowing yards.
- [tex]\( \mu_Y \)[/tex] as the mean of JT's weekly earnings for washing cars.
- [tex]\( \mu_S \)[/tex] as the mean of the total weekly earnings, where [tex]\( S = X + Y \)[/tex].
We are given:
- [tex]\( \mu_X = \$60 \)[/tex]
- [tex]\( \mu_Y = \$35 \)[/tex]
The mean of the sum [tex]\( S = X + Y \)[/tex] can be calculated by summing the individual means:
[tex]\[ \mu_S = \mu_X + \mu_Y \][/tex]
Substituting the given values:
[tex]\[ \mu_S = 60 + 35 \][/tex]
[tex]\[ \mu_S = 95 \][/tex]
Therefore, the mean of JT's total weekly earnings from both jobs is \[tex]$95. Next, we interpret this result in the context of the problem. Among the given options, the correct interpretation of the mean is: \[ \mu_5 = 95; JT can expect to earn \$[/tex] 95, on average, in a typical week. \]
This interpretation correctly describes the mean as an expected average earnings per week, rather than a guaranteed amount for a specific upcoming week.
So, the correct answer choice is:
[tex]\[ \mu_5=95; JT can expect to earn \$ 95, on average, in a typical week. \][/tex]
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