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avanturin [10]
3 years ago
15

PLEASE HELP WILL NAME BRAINIEST

Mathematics
2 answers:
djverab [1.8K]3 years ago
7 0

Answer:

1: -1\2

2: 2\4 simplified to 1\2

Step-by-step explanation:

for the first one it rises one and runs two that makes it one over two. 1\2 but since it's going down it will be negative one over two

for the second one it rise two and runs four but that's not an option so we simplify it. we divide the top by two and the bottom by two 2÷2=1 4÷2=2

seraphim [82]3 years ago
4 0

Slope formula: \frac{y_{2}-y_{1}}{x_{2}-x_{1}}

Slope of line one: -\frac{1}{2}

Slope of line two: \frac{1}{2}

Slope of line three: -\frac{2}{3}

⭐ Please consider brainliest! ⭐

✉️ If any further questions, inbox me! ✉️

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Answer:

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Do political science classes require less writing than history classes? The 55 randomly selected political science classes assig
tia_tia [17]

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No, political science classes does not require less writing than history classes.

Step-by-step explanation:

We are given that the 55 randomly selected political science classes assigned an average of 19.6 pages of essay writing for the course. The standard deviation for these 55 classes was 4.8 pages.

The 50 randomly selected history classes assigned an average of 20.2 pages of essay writing for the course. The standard deviation for these 50 classes was 3.3 pages.

<em>Let </em>\mu_1<em> = mean writing required by political science classes</em>

<em />\mu_2<em> = mean writing required by history classes</em>

SO, Null Hypothesis, H_0 : \mu_1-\mu_2\geq0  or  \mu_1\geq \mu_2    {means that political science classes require more or equal writing than history classes}

Alternate Hypothesis, H_A : \mu_1-\mu_2  or  \mu_1   {means that political science classes require less writing than history classes}

The test statistics that will be used here is <u>Two-sample t test statistics</u> as we don't know about the population standard deviations;

                     T.S.  = \frac{(\bar X_1-\bar X_2)-(\mu_1-\mu_2)}{s_p\sqrt{\frac{1}{n_1}+\frac{1}{n_2}  } }  ~ t__n__1+_n__2-2

where, \bar X_1 = sample average writing for political science course= 19.6 pages

\bar X_2 = sample average writing for history course= 20.2 pages

s_1 = sample standard deviation for political science classes = 4.8 pages

s_2 = sample standard deviation for history classes = 3.3 pages

n_1 = sample of selected political science classes = 55

n_2 = sample of selected history classes = 50

Also, s_p=\sqrt{\frac{(n_1-1)s_1^{2}+(n_2-1)s_2^{2}  }{n_1+n_2-2} }  =  \sqrt{\frac{(55-1)\times 4.8^{2}+(50-1)\times 3.3^{2}  }{55+50-2} }  = 4.154

So, <u><em>the test statistics</em></u>  =  \frac{(19.6-20.2)-(0)}{4.154 \times \sqrt{\frac{1}{55}+\frac{1}{50}  } }  ~  t_1_0_3

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Therefore, we conclude that political science classes require more or equal writing than history classes.

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