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DiKsa [7]
3 years ago
15

Find class boundaries, midpoint, and width for the class. 57-61

Mathematics
1 answer:
Bond [772]3 years ago
4 0

Answer:

The answer would be -4

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Pls Help !!!!!!!!!!!!!!
Sedaia [141]

Answer:

30

Step-by-step explanation:

7 0
2 years ago
Which best represents data that is not likely to be clustered?
AfilCa [17]

Answer: guess it your self

Step-by-step explanation:

6 0
2 years ago
A particle is moving along the x-axis so that its position at t ≥ 0 is given by s(t) = (t)In(5t). Find the acceleration of the p
Anika [276]

position =  s(t) = (t)In(5t)

velocity = ds/dt =  t d/dt (ln (5t)) +d/dt (t) ln (5t)

              = t * 5 1/5t  + ln (5t)

          =  1 + ln (5t)

acceleration = dv/dt = d^2s/dt^2 = d/dt (1 + ln(5t))

                      =d/dt (1) + d/dt (ln 5t)

                        = 0 + 1/5t * 5

                       = 1/t

0 = 1 + ln (5t)

-1 = ln (5t)

e^-1 = 5t

1/e = 5t

1/(5e) =t

acceleration = 1/t = 1/(1/5e) = 5e

Answer: 5e

5 0
3 years ago
Suppose a researcher believes that college students vote at a lower rate than college faculty. She collects data from 200 colleg
Paladinen [302]

Answer:

We conclude that college students vote at a lower rate than college faculty which means researcher’s claim was correct.

Step-by-step explanation:

We are given that a researcher believes that college students vote at a lower rate than college faculty.

She collects data from 200 college faculty and 200 college students using simple random sampling. If 138 of the students and 167 of the faculty voted in the 2008 Presidential election

<em>Let </em>p_1<em> = proportion of college students who voted in the 2008 Presidential election.</em>

<em />p_2<em> = proportion of college faculty who voted in the 2008 Presidential election.</em>

So, Null Hypothesis, H_0 : p_1-p_2\geq 0  or  p_1\geq p_2     {means that college students vote at a equal or higher rate than college faculty}

Alternate Hypothesis, H_A : p_1-p_2 < 0  or  p_1     {means that college students vote at a lower rate than college faculty}

The test statistics that would be used here <u>Two-sample z proportion</u> <u>statistics</u>;

                       T.S. =  \frac{(\hat p_1-\hat p_2)-(p_1-p_2)}{\sqrt{\frac{\hat p_1(1-\hat p_1)}{n_1}+\frac{\hat p_2(1-\hat p_2)}{n_2}  } }  ~ N(0,1)

where, \hat p_1 = sample proportion of college students who voted in the 2008 Presidential election = \frac{138}{200} = 0.69

\hat p_2 = sample proportion of college faculty who voted in the 2008 Presidential election = \frac{167}{200} = 0.835

n_1 = sample of college students = 200

n_2 = sample of college faculty = 200

So, <em><u>test statistics</u></em>  =  \frac{(0.69-0.835)-(0)}{\sqrt{\frac{0.69(1-0.69)}{200}+\frac{0.835(1-0.835)}{200}  } }

                              =  -3.458

The value of z test statistics is -3.458.

<u>Now, at 5% significance level the z table gives critical values of -1.96 and 1.96 for two-tailed test.</u>

Since our test statistics doesn't lie within the range of critical values of z, so we have sufficient evidence to reject our null hypothesis as it will fall in the rejection region due to which <u>we reject our null hypothesis</u>.

Therefore, we conclude that college students vote at a lower rate than college faculty which means researcher’s claim was correct.

8 0
2 years ago
11%,<br> 1 2<br> 1119<br> Least to greatest
umka2103 [35]

Answer:

12, 11%, 1119 this is correct

7 0
2 years ago
Read 2 more answers
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