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yarga [219]
3 years ago
6

A student rolls a die 15 times and records the results. This is the first set of data. The same student rolls a different die 15

times and records the results. This is the second set of data.
What is an appropriate conclusion about the shape of the dot plots?

A) The first dot plot is skewed to the right.

B) The second dot plot has more of a "bell-shaped" curve than the first dot plot.

C) The first dot plot has a unimodal distribution and the second dot plot has a uniform distribution.

D) The second dot plot looks to have a trimodal distribution.

Mathematics
2 answers:
Stells [14]3 years ago
3 0

Answer:

C

Step-by-step explanation:

unimodel: A unimodal distribution is a distribution with one clear peak or most frequent value. The values increase at first, rising to a single peak where they then decrease.

egoroff_w [7]3 years ago
3 0

answer is: c

Step-by-step explanation:

"A uni-modal distribution is a distribution with one clear peak or most frequent value. The values increase at first, rising to a single peak where they then decrease.Sep 18, 2013"

both of these are correct

"A uniform distribution, sometimes also known as a rectangular distribution, is a distribution that has constant probability. The probability density function and cumulative distribution function for a continuous uniform distribution on the interval are."

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3/10 *1 = 3/10  so 3/10 * (100/100) = 300/1000 = 3/10

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-7x − 3x + 2 = −8x – 8 .<br><br> SHOW WORK!!!
denis23 [38]

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3 years ago
One of the roots of the equation 3x^2+7x−q=0 is −5. Find the other root and q.
statuscvo [17]

Answer: The answer is \textup{The other root is }\dfrac{8}{3}~\textup{and}q=40.Step-by-step explanation:  The given quadratic equation is[tex]3x^2+7x-q=0\\\\\Rightarrow x^2-\dfrac{7}{3}x-\dfrac{q}{3}=0.

Also given that -5 is one of the roots, we are to find the other root and the value of 'q'.

Let the other root of the equation be 'p'. So, we have

p-5=-\dfrac{7}{3}\\\\\\\Rightarrow p=5-\dfrac{7}{3}\\\\\\\Rightarrow p=\dfrac{8}{3},

and

p\times(-5)=-\dfrac{q}{3}\\\\\\\Rightarrow \dfrac{8}{3}\times 5=\dfrac{q}{3}\\\\\\\Rightarrow q=40.

Thus, the other root is \dfrac{8}{3} and the value of 'q' is 40.

3 0
3 years ago
On his outward journey, Ali travelled at a speed of s km/h for 2.5 hours. On his return journey, he increased his speed by 4 km/
den301095 [7]

Answer:

3.08 km/h.

Step-by-step explanation:

We know that,

Speed=\dfrac{Distance}{Time}

Ali traveled at a speed of s km/h for 2.5 hours.

Let d be the distance and t be the time.

2.5=\dfrac{d}{t}

2.5t=d      ...(1)

On his return journey, he increased his speed by 4 km/h and saved 15 minutes. So, distance is d and times is t-15.

4=\dfrac{d}{t-15}

4(t-15)=d      ...(2)

From (1) and (2), we get

4(t-15)=2.5t

4t-60-2.5t=0

1.5t=60

t=40

Put t=40 in (1).

d=2.5(40)=100

So, t=40 and d=100.

Now,

Total distance = d + d = 100 + 100 = 200

Total time = t + t - 15 = 40 + 40 - 15 = 65

So, the average speed is

\text{Average speed}=\dfrac{\text{Total distance}}{\text{Total time}}

\text{Average speed}=\dfrac{200}{65}

\text{Average speed}\approx 3.08

Therefore, the average speed is 3.08 km/h.

3 0
4 years ago
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