a sameple of 137 firecrackers contained 6 duds. how many duds would you expect in a sample of 2466 firecrackers?

Honestly, it is neither beneficial to any of us for you to continually post so many questions without an explanation of what you need.

Anyways,

137 / 6 = firecrackers / duds

137/6 = 2466/x = firecrackers / duds

137/6 = 2466/x

cross multiply to get

137x = 2466*6

x = 108

so you would expect 108 duds

To find out how many duds you would expect in a sample of 2466 firecrackers, we can use the concept of proportionality.

Step 1: Calculate the proportion of duds in the given sample.
In the sample of 137 firecrackers, there were 6 duds.
So, the proportion of duds in the sample is 6/137.

Step 2: Set up a proportion.
Since we want to know the number of duds in a sample of 2466 firecrackers, we can set up a proportion as follows:

6/137 = x/2466

Here, x represents the number of duds we want to find.

Step 3: Solve for 'x'.
We can solve this proportion by cross-multiplication, which gives us:

6 * 2466 = 137 * x

14796 = 137 * x

Dividing both sides of the equation by 137, we get:

x = 14796 / 137

x ≈ 108

Therefore, we would expect approximately 108 duds in a sample of 2466 firecrackers.

Hold on there knights! Let’s say that the first one tested is a dud. Is it reasonable to stop the testing right there and say every firecracker is a dud? And how confident of that estimation would you be? It would be more helpful to explain how many firecrackers need to be tested in order to be 90% or 95% or 98% sure of your estimate of the dud rate.