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3 years ago

Which of the following must also be known in order to compute the standard deviation?A) ModeB) MeanC) RangeD) Median

Mathematics

1 answer:

igor_vitrenko [27]3 years ago

8 0

Answer:

B) Mean

Step-by-step explanation:

Standard Deviation is the measure of the amount of variation or dispersion of a set of values. Standard Deviation is represented by lower case Greek alphabet sigma σ. Standard Deviation is the square root of variance. Variance is the average of the squared differences or variation or dispersion from the Mean. Therefore, to compute standard deviation, the mean of the given data must be known.

Standard Deviation, σ = $\sqrt{Variance}$

σ = $\sqrt({\frac{1}{N-1}}$ ∑ $_{i = 1}^{N}(x_{i} - X)^{2})$

where

$x_{1},x_{2},x_{3}, ...x_{N},$ are the values of the sample observed,

X is the mean value of these observations, and

N is the number of observations in the sample.

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254 cm to inches with explanation please

sdas [7]

Answer:

100 inch

Step-by-step explanation:

1 cm=0.394 inch

254 cm×0.394=100 inch

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2 years ago

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Tom drove 408 miles using 16 gallons of gas. at this rate, how many miles would he drive using 11 gallons of gas?

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(11x408) / 16 = 280.5 miles on 11 gal of gas

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2 years ago

Classify the random variables below according to whether they are discrete or continuous. a. The floor area of a kitchen. b. The

kherson [118]

Answer:

A. Continuous, B. Discrete, C. Continuous, D. Continuous, E. Continuous.

Step-by-step explanation:

A. Area is a continuous unit. Then, the floor area of a kitchen is a continuous random variable.

B. Quantity is a discrete unit. Then, the number of bacteria in a particular cubic centimeter of drinking water is a discrete random variable.

C. The money amount is a continuous unit. Then, the dollar amount of the change in my pocket is a continuous random variable.

D. The pressure is a continuous unit. Then, the barometric pressure at a given location is a continuous random variable.

E. Time is a continuous unit. Then, the difference in reaction time to the same stimulus before and after training is a continuous random variable.

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3 years ago

Evaluate the. Expression x+ 9, if x= 8. 1, 2, 17, 89

Solnce55 [7]

Answer:

Step-by-step explanation:

We are given the expression find x + 9 if x = 8.

When a certain number has a variable and the value of the variable is known, all you have to do is plug in the variable amount into the equation, therefore :

x is 8 , so we plug in 8 for x

x + 9 =

8 + 9 = 17

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2 years ago

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There are 412 students and 20 teachers taking buses on a trip to a museum. Each bus can seat a maximum of 48. Which inequality g

-BARSIC- [3]

The inequality $\mathrm{b} \geq \frac{\text { total number of travelers }}{\text { capacity of each bus }}$ gives the least number of buses, b, needed for the trip. The least number of buses is 9

Solution:

Given that, There are 412 students and 20 teachers taking buses on a trip to a museum.

Each bus can seat a maximum of 48.

We have to find which inequality gives the least number of buses, b, needed for the trip?

Now, there are 412 students and 20 teachers, so in total there are 412 + 20 = 432 travelers

The number of buses required “b” is given as:

$\text { (b) } \geq \frac{\text { total number of travelers }}{\text { capacity of each bus }}$

$\text { So, number of buses required } \geq \frac{432}{48}$

Number of buses required ≥ 9 buses.

But least number will be 9 from the above inequality.

Hence, the inequality $\mathrm{b} \geq \frac{\text {total number of travelers}}{\text {capacity of each bus}}$ gives least count of busses and least count is 9.

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3 years ago