Answer:
D) a chi square test for independence.
Step-by-step explanation:
Given that we suspect that automobile insurance premiums (in dollars) may be steadily decreasing with the driver's driving experience (in years), so we choose a random sample of drivers who have similar automobile insurance coverage and collect data about their ages and insurance premiums.
We are to check whether two variables insurance premiums and driving experience are associated.
Two categorical variables are compared for different ages and insurance premiums.
Hence a proper test would be
D) a chi square test for independence.
The are 6 possible outcomes because there are 6 tiles.
We are given with
x1 = 20 min
s1 = 2 min
x2 = 30 min
s2 = 4 min
p = 0.9
Condition (x > 25)
We need to get the t-value between the two means and comparing it wit the t-value for the time of 25 minutes given that there is a 90% probability that the weather will be good. Simply use the t-test formula and use the t-test table to get the probability.
First, let's construct an algebraic equation to formally find the answer:
Let x represent (the value of) the unknown number.
x²= 5x + 24 --- This equation shows that the (positive) number's square equals 24 more than 5 times the number.
Now we can solve for x (the number):
x² = 5x + 24
x² - 5x - 24 = 0
(x + 3)(x - 8) = 0
x = -3, 8
Therefore, this means that x (the number ) can be either -3 OR 8. Both will satisfy the description.
Hope this helps!
Answer:
<u>Part A: Cost for the flooring is $ 4,231.50</u>
<u>Part B: Cost for the flooring is $ 5,531.50</u>
Step-by-step explanation:
Step 1:
Let's calculate the area of the living/dining room, this way:
Area = 26 * 25
Area = 650 ft²
Step 2:
Let's calculate the cost of the flooring if Nancy installs it:
Cost = $ 6.51 * Area of the living/dining room
Cost = 6.51 * 650
<u>Cost = $ 4,231.50</u>
Step 3:
Let's calculate the cost of the flooring if the flooring company installs it:
Cost = $ 8.51 * Area of the living/dining room
Cost = 8.51 * 650
<u>Cost = $ 5,531.50</u>
