Answer:
Yes, we can conclude that the population standard deviation of TV watching times for teenagers is less than 2.66
Step-by-step explanation:
H0 : σ² = 2.66²
H1 : σ² < 2.66²
X²c = (n - 1)*s² ÷ σ²
sample size, n = 40
Sample standard deviation, s = 1.9
X²c = ((40 - 1) * 1.9²) ÷ 2.66²
X²c = 140.79 ÷ 7.0756
X²c = 19.897
Using a confidence level of 95%
Degree of freedom, df = n - 1 ; df = 40 - 1 = 39
The critical value using the chi distribution table is 25.6954
Comparing the test statistic with the critical value :
19.897 < 25.6954
Test statistic < Critical value ; Reject the Null
Hence, we can conclude that the population standard deviation of TV watching times for teenagers is less than 2.66
This is the function
Then factor 2 out
Divide both side by two and use the quadratic formula to get the following
X=3 And x=-2 and don't forget to Chek them
Answer:
2665 miles in 13 hours, the rate is 205 mph.
Step-by-step explanation:
410/2 is 205 mph. 205 mph * 13 hours is 2665 miles.
Please help solve 12-14
( will give brianlst :))
1=9/12
1=3/4
if you want this
