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gayaneshka [121]

4 years ago

9

PLEASE HELP! Which of the following is a discrete random variable? a) length of time you play in a baseball game b) length of a

car c) volume of water in a tank d) number of candies in a box

2 answers:

wlad13 [49]4 years ago

8 0

Answer:

The answer is D: the number of candies in a box.

Step-by-step explanation:

AysviL [449]4 years ago

4 0

Answer:

D) number of candies in a box

Step-by-step explanation:

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A large bakery produces cakes in an assembly line. Sergio noticed a potential defect that seems to be showing in every other cak

olya-2409 [2.1K]

Its better to choose the simple random samples, if the defect is in every other cake, a systematic random sample could miss it completely depending on what Sergio chooses for k.

Here he is taking a random sample of cakes to get a better idea of how many cakes might have this defect.

The random sample is defined as the method of choose a sample from the group of sample and each of the sample has same probability of being chosen

The systematic sample is the method of choosing the sample from the group of sample with a periodic interval.

Here Sergio noticed a potential defect that seems to be showing in every other cake, so there will be chance of missing the defect completely

Hence, to choose the defect items, the simple random sample is better than systematic random sample.

Learn more about simple random sample here

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4 0

1 year ago

Which graph has a rate of change of zero?

Karolina [17]

Answer:

graph #x

Step-by-step explanation:

where are the graphs

5 0

4 years ago

Read 2 more answers

Find the diagonal (d) of the base

bazaltina [42]

Answer:

$4\sqrt{5}\ un.$

Step-by-step explanation:

The picture shows rectangular prism with rectangular base and heigth h. The dimenssions of base rectangle are l and w.

The diagonal of reactangle with known length l and width w can be calculated using the Pythagorean theorem:

$d^2=l^2+w^2,\\ \\d^2=8^2+4^2,\\ \\d^2=64+16,\\ \\d^2=80,\\ \\d=4\sqrt{5}\ un.$

3 0

4 years ago

22. Abnormalities In the 1980s, it was generally believed that congenital abnormalities affected about 5% of the nation’s childr

Vinvika [58]

Answer:

Step-by-step explanation:

Set up null and alternate hypothesis

H0: p =0.05

Ha: p>0.05

(One tailed test at 5% level)

Sample size n =384

Sample proportion p = 46/384 =0.1198

p difference = 0.1198-0.05 =0.0698

Std error = $\sqrt{\frac{0.1198*0.8702}{384} } =0.0165$

Test statistic = 4.23

p value = 0.000012

Since p<0.05, we reject null hypothesis

There is more than 99.95% probability that proportion is more than 0.05

We accept the claim that the risk has increased.

6 0

3 years ago

Write the equation of the line passing through the points (-1, 2) and (3.4)

Bond [772]

Answer:

$\boxed{y = 0,5x + 2,5}$

Step-by-step explanation:

Equation of a straight line: y = kx + b

Points: (-1,2) and (3,4)

Сompose the system of equations:

$\displaystyle \left \{ {{2=-k + b} \atop {4=3k + b}} \right$ $\displaystyle \left \{ {{b= k + 2} \atop {b=4 - 3k}} \right \Longrightarrow 2 + k = 4 - 3k$

$2 + k = 4 - 3k$

$4k = 2|:4$

$k = 0,5$

$b = k + 2 = 0,5 + 2 = 2,5$

$y = 0,5x + 2,5$

6 0

3 years ago