Look at the graph, Cost of Toy Cars
20
Iy
18
18
14
12
Cost
10
8
6
4
2
1 2
3
4
7
8
X
Cars
What is the cost of 18 toy cars?
$12
O $20

Atextile fiber manufacturer is investigating a new drapery yarn, which the company claims has a mean thread elongation of 12 kilograms with a standard deviation of 0.5 kilograms. the company wishes to test the hypothesis upper h subscript 0 baseline colon mu equals 12 against upper h subscript 1 baseline colon mu less-than 12 using a random sample of n equals 4 specimens. calculate the p-value if the observed statistic is x overbar equals 11.8. round your final answer to five decimal places (e. g. 98.76543).