Answer:
The critical value approach and the p-value approach gave the same result.
Step-by-step explanation:
We are given the following in the question:
Population mean, μ = 4 hours
Sample mean, = 4.5
Sample size, n = 460
Alpha, α = 0.051
Population standard deviation, σ = 1.00 hour
First, we design the null and the alternate hypothesis
We use One-tailed z test to perform this hypothesis.
Formula:
Putting all the values, we have
Now,
Since,
We reject the null hypothesis and accept the alternate hypothesis. Thus, low-income families are exposed to more than 4.0 hours of daily background television.
p value at z-stat 3.87 is 0.000054. Since p-value is less than the significance level. We reject the null hypothesis.
Hence, the critical value approach and the p-value approach gave the same result.
Answer:
25 minutes
Step-by-step explanation:
Worker1 is filling up at a rate of 11 per minute while worker2 is filling up at a rate of 11+1 per minute. Since worker1 has 25 extra barrels and since worker2 makes one extra barrel per minute it will take exactly 25 minutes to match worker1's barrel count.
Each square is a square on the grid.
Answer:
a. Please refer to the diagram below
b. 0.385875
Step-by-step explanation:
The tree diagram is shown below.
To calculate the probability of at least one sale to the three customers, we have to ways. The easier way is to calculate the probability of no sales to three and subtract the value from one:
Other way is to calculate the sum of following probabilities:
One sale + Two sale + Three sale.
For the probability, please refer to the tree diagram. If moving to the sub branch of the previous branch, we multiply the probability; otherwise we add.
Set your calculator to radians and enter arcsin ( or sin-1) and 0.6
answer is 0.64 radians