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3 years ago

Can you help me to do part C and part D, please thank you!

Mathematics

1 answer:

NeX [460]3 years ago

7 0

Ok so for C. yes you can change the mode and median but not the mean. You can do so because depending on where the coins land it can change the mode and the median can be different because the number are mixed meaning the numbers could have more larger or smaller numbers. Ok now for part D. Yes you can on purpose because you can always change the numbers to equal a reasonable median. In doing so you may change the mode though.

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A study indicates that 37% of students have laptops. You randomly sample 30 students. Find the mean and the standard deviation o

Brilliant_brown [7]

Answer:

The mean and the standard deviation of the number of students with laptops are 1.11 and 0.836 respectively.

Step-by-step explanation:

Let X = number of students who have laptops.

The probability of a student having a laptop is, P (X) = p = 0.37.

A random sample of n = 30 students is selected.

The event of a student having a laptop is independent of the other students.

The random variable X follows a Binomial distribution with parameters n and p.

The mean and standard deviation of a binomial random variable X are:

$\mu=np\\\sigma=\sqrt{np(1-p)}$

Compute the mean of the random variable X as follows:

$\mu=np=30\times0.37=1.11$

The mean of the random variable X is 1.11.

Compute the standard deviation of the random variable X as follows:

$\sigma=\sqrt{np(1-p)}=\sqrt{30\times0.37\times(1-0.37)}=\sqrt{0.6993}=0.836$

The standard deviation of the random variable X is 0.836.

5 0

3 years ago

Carlos read 144 pages in 3 hours. His little sister read 24 pages in 1 hour. Carlos’s average reading rate is what percent of hi

vivado [14]

Answer: It would be B, 200%

Step-by-step explanation:

144/3 = 48

48/24 = 2

48/0.24%= 200%

8 0

3 years ago

Can somebody write me a 5 sentence paragraph summary about geometry ??

kotegsom [21]

Step-by-step explanation:

Geometry is one of the oldest branches of math. Geometry is mostly about distance, shape, size, and relative position of figures. It is related to measurement, relationships of points, lines, angles, surfaces, and solids. There are 8 types of Geometry and the basic concepts of Geometry are point, line and plane. It isn't possible to exactly define the terms, however, we know it is refers to the mark of the position and has an accurate location.

Hope this helps :)

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3 years ago

Marie buys 16 bags of potting soil that comes in 5 - 8 pound bags. If Marie's father calls and he needs 13 pounds of potting soi

vesna_86 [32]

One bag of 5 pounds and one bag of 8 pounds

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3 years ago

If N collected 4/20lb of cloth and Z collected 7/8lb of cloth.

love history [14]

First you need to give both fractions a common denominator lets say 40. So N would be 8/40 and Z would be 35/40, so Z collected more than N. All together they collected 43/40 which simplifies to be 1 and 2/40 which would again simplify to 1 and 1/20.

8 0

4 years ago