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3 years ago

7

The 100-meter dash times in the girls track meet were normally distributed with a mean of 13 seconds and a standard deviation of

0.3 seconds. What is the probability that a runner finished between 12.4 and 14 seconds?

1 answer:

Svetllana [295]3 years ago

5 0

Answer:

97.68 %

z(lower) = .0227

z(upper) = .999

Step-by-step explanation:

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Which of the following is equivalent to the expression below?<br> 4x + 3(2x - 1) - 4x

sleet_krkn [62]

6x-3 should be the answer

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3 years ago

Which number line shows the solution to the inequality x + 3 \< 1?

Anton [14]

Answer:

For every real number x, C expresses the solution to the inequality

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3 years ago

A water tank is being filled with water. Before water is pumped in, the water level in the tank is 11 inches high. After 20 minu

serg [7]

Answer:

(58-11) divided by 20

Step-by-step explanation:

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3 years ago

Tamiku [17]

Answer:

a) Mean = 2.8

b) Median = 3

c) Mode = 4

d) Mid range = 2.5

e) Option C) Only the mode makes sense since the data is nominal.

Step-by-step explanation:

We are given the following data set in the question:

1, 4, 4, 4, 2, 1, 4, 3, 1, 4, 4, 3, 3, 1

a) Mean

$Mean = \displaystyle\frac{\text{Sum of all observations}}{\text{Total number of observation}}$

$Mean =\displaystyle\frac{39}{14} = 2.78 \approx 2.8$

b) Median

$Median:\\\text{If n is odd, then}\\\\Median = \displaystyle\frac{n+1}{2}th ~term \\\\\text{If n is even, then}\\\\Median = \displaystyle\frac{\frac{n}{2}th~term + (\frac{n}{2}+1)th~term}{2}$

Sorted data:

1, 1, 1, 1, 2, 3, 3, 3, 4, 4, 4, 4, 4, 4

$\text{Median} = \dfrac{7^{th}+8^{th}}{2} = \dfrac{3+3}{2} = 3$

c) Mode

Mode is the observation with highest frequency. Since 4 appeared maximum time

Mode = 4

d) Mid range

It is the average of the smallest and largest observation of data.

$\text{Mid Range} = \dfrac{1+4}{2} = 2.5$

e) Measure of center

Option C) Only the mode makes sense since the data is nominal.

4 0

4 years ago

Pls answer me this all question correctly pls I beg you pls friends pls pls pls pls pls pls pls pls

Andre45 [30]

Answer:

$a. \: 28$

$b. \: 5$

Step-by-step explanation:

$a. \: 88 \div 3 \frac{1}{7}$

$88 \div \frac{22}{7}$

Multiply the numerator by the reciprocal of the denominator.

$88 \div \frac{7}{22}$

$4 \times 7$

$28$

$b. \: 49 \frac{2}{9} \div 9 \frac{4}{9}$

$\frac{425}{9} \div \frac{85}{9}$

Multiply the numerator by the reciprocal of the denominator.

$\frac{425}{9} \times \frac{9}{85}$

$5$

<h3>Hope it is helpful...</h3>

5 0

3 years ago