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3 years ago

Who likes cats? brainliest

Mathematics

2 answers:

Flauer [41]3 years ago

8 0

Answer:

Step-by-step explanation:

hope this answer your question

ollegr [7]3 years ago

6 0

Answer:

Step-by-step explanation:

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A simple random sample of size nequals40 is drawn from a population. The sample mean is found to be 103.9, and the sample stand

yan [13]

Answer:

There is enough evidence to support the claim that the population mean is greater than 100

Step-by-step explanation:

Step 1: We state the hypothesis and identify the claim

$H_0:\mu=100$ and $H_1:\mu \:>\:100$ (claim)

Step 2: Calculate the test value.

$t=\frac{\bar X-\mu}{\frac{s}{\sqrt{n} } }$

$\implies t=\frac{103.9-100}{\frac{21.9}{\sqrt{40} } }=1.1263$

Step 3: Find the P-value. The p-value obtained from a calculator is using d.f=39 and test-value 1.126 is 0.134

Step 4: We fail to reject the null hypothesis since P-value is greater that the alpha level. (0.134>0.05).

Step 5: There is enough evidence to support the claim that the population mean is greater than 100.

Alternatively: We could also calculate the critical value to obtain +1.685 for $\alpha=0.05$ and d.f=39 and compare to the test-value:

The critical value (1.685>1.126) falls in the non-rejection region. See attachment.

NB: The t- distribution must be used because the population standard deviation is not known.

5 0

3 years ago

How many solutions does this system have? 7. X = -2

Blizzard [7]

Answer:

One

Explanation:

XXX

⇔

XXX

⇔

−

both equations are linear and they are not co-linear

therefore there is exactly 1 solutio

3 0

2 years ago

14. Boyle’s Law states that when a sample of gas is compressed at a constant temperature, the pressure P of the gas is inversely

Ostrovityanka [42]

Answer:

dV/dt = 100 cm³/min

Step-by-step explanation:

Given

V = 728 cm³

P = 182 kPa

dP/dt = - 25 kPa/min

dV/dt = ?

If we apply the ideal gas equation

P*V = n*R*T

where n*R*T is constant

we have

d(P*V)/dt = d(n*R*T)/dt

⇒ d(P*V)/dt = 0

⇒ V*(dP/dt) + P*(dV/dt) = 0

⇒ dV/dt = - (V/P)*(dP/dt)

Plugging the known values we obtain

⇒ dV/dt = - (728 cm³/182 kPa)*(- 25 kPa/min)

⇒ dV/dt = 100 cm³/min

5 0

3 years ago

This question is confusing

irakobra [83]

Answer:

Step-by-step explanation:

5 0

3 years ago

The biology faculty at a college consists of 9 full professors, 14 associate professors, 13 assistant professors, and 4 instruct

-Dominant- [34]

32 total
9/32 -professor
9/32 -instructor
9/32+9/32=18/32=9/16

5 0

3 years ago