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A triangle with vertices labeled as A, B, C. Side B C is base. Sides A B and A C contain midpoints D and E, respectively. A line segment is drawn from D to E. Side A D is labeled as 4. Side D B is labeled as 6. Side A E is labeled as 3.2. Side E C is labeled as 4.8.
2 answers:
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Answer:
There is evidence to show that the single-earner couples on average spend more time watching television together
Step-by-step explanation:
Given that a recent study compared the time spent together by single- and dual-earner couples. According to the records kept by the wives during the study, the mean amount of time spent together watching television among the single-earner couples was 61 minutes per day, with a standard deviation of 15.5 minutes. For the dual-earner couples, the mean number of minutes spent watching television was 48.4 minutes, with a standard deviation of 18.1 minutes.
(Right tailed test where x stands for single earner and y for double)
Let us assume sample sizes are 500 each.
Difference -12.600
Standard error 1.066
95% CI -14.6913 to -10.5087
t-statistic -11.823
DF 998
Significance level P < 0.0001
Since p is less than alpha we reject null hypothesis.
There is evidence to show that the single-earner couples on average spend more time watching television together
Answer:
The correct option is 2.
Step-by-step explanation:
According to the the center-of-gravity technique, the coordinates of the center-of-gravity location are
Where ( represent the coordinates and
is demand.
We have to find the Y-coordinate of the center-of-gravity location.
The sum of product of demand and corresponding y coordinates is
The sum of demanded units is
The Y-coordinate of the center-of-gravity location is
The Y-coordinate of the center-of-gravity location is 131. Therefore the correct option is 2.