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3 years ago

Which equation has no solution?

Mathematics

1 answer:

polet [3.4K]3 years ago

3 0

Answer:

number 3

Step-by-step explanation:

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Descent, Inc., produces a variety of climbing and mountaineering equipment. One of its products is a traditional three-strand cl

Rainbow [258]

Solution :

Assuming $\sigma_1^2=\sigma_2^2$

We have to test

$H_0:\mu_1=\mu_2$

Against $H_a: \mu_1 \neq \mu_2$

Level of significance, $\alpha = 0.05$

$s_p=\sqrt{\frac{(n_1-1)s_1^2+ (n_2-1)s_2^2}{n_1+n_2-2}}$

$s_p=\sqrt{\frac{(25-1)(425)^2+ (20-1)(415)^2}{25+20-2}}$

= 420.6107

Under $H_0$ , the t-statistics is as follows:

$t=\frac{(\overline{x_1} - \overline{x_2})}{s_p\sqrt{\frac{1}{n_1}+\frac{1}{n_2}}} \sim$ $\text{t with }(n_1+n_2-2) \ DF$

$t=\frac{(7200-7087)}{(420.6107)\sqrt{\frac{1}{25}+\frac{1}{20}}}$

= 0.90

DF = (25 + 20 - 2)

= 43

P-value of the test = 0.375

Since the p value is more than 0.05, we fail to reject our null hypothesis.

There is no difference between then mean tensile strength of the ropes that is produced in the Bozeman and Challis.

3 0

3 years ago

Please Hurry! I will award the first person right the brainlyest award

Len [333]

Answer:

y = -3

Step-by-step explanation:

When you graph it on a graphing calculator or on desmos, it appears to be at y = -3

6 0

2 years ago

Read 2 more answers

May someone help me with B) Thank you so much ❤❤

Tom [10]

180 degrees - 116 degrees =64 degrees (angle PDC)

180 degrees - 64 degrees = 116 degrees (angle APD)

3 0

3 years ago

If a box in the group has a length of 30 inches what is its volume

USPshnik [31]

V=a^3
v=30^3
v=27000in^3

7 0

3 years ago

A chimp is taking a multiple - choice test of course the chip can't read and his guessing for every question. If there are 4 cho

tia_tia [17]

Answer:

Step-by-step explanation:

He will guess correctly 25% of the time.

He has 84 questions

25% of 84

.25 * 84

We should expect that he will get 21 questions correct

6 0

3 years ago