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tensa zangetsu [6.8K]
3 years ago
6

A production manager tests 10 lightbulbs and finds their mean lifetime is 442 hours. She then designs a sales package for this t

ype of bulb. It states that consumers can expect the bulb to last approximately 450 hours. This is an example of what phase of inferential statistics?
Mathematics
2 answers:
levacccp [35]3 years ago
7 0

probability-based inference

PSYCHO15rus [73]3 years ago
7 0

Answer:

probability-based inference

Step-by-step explanation:

apex

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Ask Your Teacher Consider a binomial random variable with n = 5 and p = 0.8. Let x be the number of successes in the sample. Eva
Readme [11.4K]

Answer:

0.942 is the required probability.  

Step-by-step explanation:

We are given the following in the question:

x is a binomial random variable with n = 5 and p = 0.8.

Then,

P(X=x) = \binom{n}{x}.p^x.(1-p)^{n-x}

where n is the total number of observations, x is the number of success, p is the probability of success.

We have to evaluate:

P(x \geq 3) = P(x = 3) + P(x = 4) +P(x=5)\\\\= \binom{5}{3}(0.8)^3(1-0.8)^2 +\binom{5}{4}(0.8)^4(1-0.8)^1 +\binom{5}{5}(0.8)^5(1-0.8)^0\\\\= 0.2048 +0.4096+0.3276=0.942

0.942 is the required probability.

4 0
3 years ago
Are short-term investments less prone to price validity than long-term investments true or false
gizmo_the_mogwai [7]

Answer:

yes its true

Step-by-step explanation

its true

5 0
2 years ago
In a fruit basket , there are 6 apples and 3 oranges . what fraction of the basket are apples ?
solong [7]

Answer:

6/9=2/3

hope this helps

have a good day :)

Step-by-step explanation:

8 0
3 years ago
Read 2 more answers
A rectangular yard has dimensions 10 meters by 8 meters. In the middle of the yard is a rectangular pond of 8 square meters, lea
Nikolay [14]

hahahaha i had this same question in my grade

8 0
3 years ago
Find the area of an equilateral triangle with radius 22 cm. Round to the nearest whole number.
earnstyle [38]

Answer:this item, we are given with the radius equal to 22 cm.

In this measurement of the radius is the hypotenuse of the 30°-60°-90° triangle formed with the half the measurement of the side of the equilateral triangle being opposite to the 60°  and equal to the hypotenuse times (1/2)(√3)

Step-by-step explanation:

If we let s be the side of the triangle then,

                 s/2 = r(1/2)(√3)

Multiplying the equation by 2,

                 s = r√3

Substituting,

              s = (22 cm)(√3) = 22√3

The area of the equilateral triangle is computed through the equation,

         A = (√3 / 4)(s²)

Substituting,

         A = (√3 / 4)(22√3)² = 628.7 cm²

Therefore, the answer to this item is the first choice. 

4 0
3 years ago
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