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Vladimir [108]
3 years ago
13

3 is less than the sum of a number s and 4

Mathematics
1 answer:
monitta3 years ago
7 0
3 is less than the sum of any positive number added with 4
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8.23 A manufacturing company produces electric insulators. You define the variable of interest as the strength of the insulators
Kitty [74]

Answer:

The 95% confidence interval estimate for the population mean force is (1691, 1755).

Step-by-step explanation:

According to the Central Limit Theorem if we have an unknown population with mean μ and standard deviation σ and appropriately huge random samples (n > 30) are selected from the population with replacement, then the distribution of the sample mean will be approximately normally.

The sample selected here is <em>n</em> = 30.

Thus, the sampling distribution of the sample mean will be normal.

Compute the sample mean and standard deviation as follows:

\bar x=\frac{1}{n}\sum x=\frac{1}{30}\times 51702=1723.4\\\\s=\sqrt{\frac{1}{n-1}\sum (x-\bar x)^{2}}=\sqrt{\frac{1}{30-1}\times 232561.2}=89.55

Construct a 95% confidence interval estimate for the population mean force as follows:

CI=\bar x\pm z_{\alpha /2}\times\frac{s}{\sqrt{n}}

    =1723.4\pm 1.96\times\frac{89.55}{\sqrt{30}}\\\\=1723.4\pm 32.045\\\\=(1691.355, 1755.445)\\\\\approx (1691, 1755)

Thus, the 95% confidence interval estimate for the population mean force is (1691, 1755).

3 0
3 years ago
Find the first term of the sequence 4, 12, 36, 108.... which exceeds 20,000.
Schach [20]

Answer:

43740

Step-by-step explanation:

its an exponential factor of 3 just multiply each answer by 3 to get the next one up

5 0
3 years ago
HELP ME WITH MATHHH!!!
tatiyna

Answer:

A

Step-by-step explanation:

3 0
3 years ago
Pls help i might give brainliest
zmey [24]

Answer:

60% I hope I help :) have a great day

6 0
3 years ago
Rounded what is 489291 rounded to the nearest hundred
Mrac [35]
The answer is 489,300.

Work:

We go to the tenth's place, which is 9. Since 9 is higher than 5, we need to round the hundredth's place to 3.
8 0
3 years ago
Read 2 more answers
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