A survey collected data from a random sample of 121 people living in Jade city. The sample average of the distance people travel
to reach their workplaces (Ȳ) is 20.35 km and the standard deviation (Y) is 7.96 km.
(a) The standard error of the sample average of the distance people travel to reach their workplaces is ____ km. (Round your answer to two decimal places.)
Let μ_Y denote the mean of the distance all the people in Jade city travel to reach their workplaces.
(b) The p-value of the test Upper H0: μ_Y = 22 km vs. Upper H1: μ_Y' = 22 Km is ____. (Round your answer to two decimal places.)
(c) The p-value suggests that at the 5% significance level, we ________(reject/ fail to reject) the hypothesis that the mean distance people travel to reach their workplaces in Jade city is 22 km.
(a) The standard error of the sample average of the distance people travel to reach their workplaces is ____ km. (Round your answer to two decimal places.)
Let μ_Y denote the mean of the distance all the people in Jade city travel to reach their workplaces.
(b) The p-value of the test Upper H0: μ_Y = 22 km vs. Upper H1: μ_Y' = 22 Km is ____. (Round your answer to two decimal places.)
(c) The p-value suggests that at the 5% significance level, we ________(reject/ fail to reject) the hypothesis that the mean distance people travel to reach their workplaces in Jade city is 22 km.
1 answer:
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Answer:
The age of youngest brother is <u>21</u>.
Step-by-step explanation:
Given:
The ages of 3 brothers are represented by consecutive integers.
If the oldest brother's age is decreased by twice the younger brother's age, the result is -19.
Now, to find the age of youngest brother.
Let the age of youngest brother be
Let the age of middle one be .
And the age of oldest brother age be
According to question:
⇒
⇒
Adding on both sides we get:
⇒
Adding 19 on both sides we get:
⇒
Now, getting the age of youngest brother by putting the value of :
⇒
Therefore, the age of youngest brother is 21.