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3 years ago

Which Benchmark angles multiples of 30 degrees or 45 are closest to the rotation angles below?plz help

1 answer:

6 0

Simply divide by 30 or 45 to see :)

a) 45 is closer
b) 45 is closer
c) 45 is closer
d) 45 is closer
e) 30 is closer
f) 45 is closer

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A professor wishes to discover if seniors skip more classes than freshmen. Suppose he knows that freshmen skip 2% of their class

KIM [24]

Answer:

We conclude that seniors skip more than 2% of their classes at 0.01 level of significance.

Step-by-step explanation:

We are given that a professor wishes to discover if seniors skip more classes than freshmen. Suppose he knows that freshmen skip 2% of their classes.

He randomly samples a group of seniors and out of 2521 classes, the group skipped 77.

Let p = percentage of seniors who skip their classes.

So, Null Hypothesis, $H_0$ : p $\leq$ 2% {means that seniors skip less than or equal to 2% of their classes}

Alternate Hypothesis, $H_A$ : p > 2% {means that seniors skip more than 2% of their classes}

The test statistics that will be used here is One-sample z proportion statistics;

T.S. = $\frac{\hat p-p}{{\sqrt{\frac{\hat p(1-\hat p)}{n} } } } }$ ~ N(0,1)

where, $\hat p$ = sample proportion of seniors who skipped their classes = $\frac{77}{2521}$

n = sample of classes = 2521

So, test statistics = $\frac{\frac{77}{2521} -0.02}{{\sqrt{\frac{\frac{77}{2521}(1-\frac{77}{2521})}{2521} } } } }$

= 3.08

The value of the test statistics is 3.08.

Now at 0.01 significance level, the z table gives critical value of 2.3263 for right-tailed test. Since our test statistics is more than the critical value of z as 2.3263 < 3.08, so we have sufficient evidence to reject our null hypothesis as it will fall in the rejection region due to which we reject our null hypothesis.

Therefore, we conclude that seniors skip more than 2% of their classes.

6 0

4 years ago

Select the two values of x that are roots of this equation. 2x2 + 7x + 6 = 0

SVEN [57.7K]

Hopes this helps:

Answer: x = -10/7

1. Simplify 2 • 2 to 4
4 + 7x + 6 = 0

2. Simplify 4 + 7x + 6 to 7x + 10.
7x + 10 = 0

3. Subtract 10 from both sides.
7x = -10

4. Divide both sides by 7.
X = -10/7

3 0

3 years ago

Two bicycles are driving on the circle in the same direction with speeds of 9 mph and 5 mph respectively. How many points are th

Molodets [167]

Answer:2

Step-by-step explanation:

3 0

3 years ago

Solve the function. h(x)= 6x - 10 ————- X + 3 Help please

Rus_ich [418]

Answer:

X+3=0

X=-3

H(x)=6*-3 - 10

H(x) =-18 - 10

H(x) =-28

8 0

3 years ago

Hii, can someone please help? I'm giving BRAINLIEST

Nookie1986 [14]

Answer:

It would Be C I hoped this helped

5 0

3 years ago

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