When you divide these you get
15.25/244=0.0625
#5 is very nicely and correctly done.
#7 says: "No matter what X may be, this function of it is always 9 more than 1/2 of X .".
That's a very powerful statement. Now you know that if X is ever 2, the function will be 1/2(2)+9 which is 10.
If X is ever zero, the function will be 1/2(0)+9 which is 9. If X is ever a cow, the function will be 1/2 of a cow, plus the number 9. Which makes no sense, but that's what the function says.
So, when X is -8, the function is 1/2 of -8, plus 9. Which is 5 ... the 'f' of -8.
Whatever X happens to be at the moment, just write that number in place of X in the function, and it'll show you the function of what X is.
f(a bazillion) = 1/2(a bazillion) + 9 .
f(a-28) = 1/2(a-28) + 9 (but simplify it)
Answer:
The p-value of the test statistic from the standard normal table is 0.0017 which is less than the level of significance therefore, the null hypothesis would be rejected and it can be concluded that there is sufficient evidence to support the claim that less than 20% of the pumps are inaccurate.
Step-by-step explanation:
Here, 1304 gas pumps were not pumping accurately and 5689 pumps were accurate.
x = 1304, n = 1304 + 5689 = 6993
The level of significance = 0.01
The sample proportion of pump which is not pumping accurately can be calculated as,
The claim is that the industry representative less than 20% of the pumps are inaccurate.
The hypothesis can be constructed as:
H0: p = 0.20
H1: p < 0.20
The one-sample proportion Z test will be used.
The test statistic value can be obtained as:
The estimate the total cost to rent 3 movies and buy popcorn, a soda, and a candy bar is $18. option C
<h3>Total cost</h3>
This is the summation of all units cost of items or the results of adding all cost(fixed and variable)
Cost of movies = $3.75
= $4.00 to the nearest dollar
Cost of snacks (drinks, popcorn, candy bars) = $1.89 each
= $2.00 to the nearest dollar
Cost to rent 3 movies and buy popcorn, a soda, and a candy bar.
Total cost = (Cost of movies × number of movies) + cost of popcorn + cost of soda + cost of candy bar
= (4 × 3) + 2 + 2 + 2
= 12 + 2 + 2 + 2
= $18
Therefore, the estimate the total cost to rent 3 movies and buy popcorn, a soda, and a candy bar is $18. option C
Learn more about total cost:
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Answer:
c
Step-by-step explanation:
