Answer:
The expected frequency is 90
Step-by-step explanation:
If the given probabilities are taken as observed
pXL=0.10, 450*0.1= 45
pL=0.20, 450*0.2= 90
pM=0.40, 450*0.4= 180
pS=0.20, 450*0.2= 90
pXS=0.10 450*0.1= 45
We can assign the expected frequencies to be 450/5= 90 each
The chi square goodness fit test can be calculated as
Observed Expected (o-e) (o-e)² (o-e)² /e
45 90 -45 2025 22.5
90 90 0 0 0
180 90 90 8100 90
90 90 0 0 0
<u> 45 90 -45 2025 22.5 </u>
<u>∑ 135 </u>
<u />
χ²= 135
The χ² value at 0.05 is 9.49
The result is significant.
Answer:
2squrt10
Step-by-step explanation:
use Pytago: x=squrt(2^2+6^2)
Answer:
- 135 adult tickets
- 186 student tickets
Step-by-step explanation:
Let x represent the number of adult tickets sold. Then (321-x) is the number of student tickets sold. The total revenue is ...
3.50x + 2.50(321-x) = 937.50
x + 802.50 = 937.50 . . . . . eliminate parentheses, collect terms
x = 135 . . . . . . subtract 802.50; number of adult tickets
321-x = 186 . . . . number of student tickets
135 adult tickets and 186 student tickets were sold.
The answer I got is 3x/5 + -w/2
Answer:
Step-by-step explanation:
(9*20)-(8*6) = 132 sq cm
