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Setler79 [48]
3 years ago
9

Find the critical values

Mathematics
1 answer:
sesenic [268]3 years ago
4 0

Answer: this is very hard and i was wondering if there is more info

Step-by-step explanation:

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marissa [1.9K]

Answer:

The answer is always

Hope this helps......... :)

7 0
3 years ago
A random sample of 100 observations from a quantitative population produced a sample mean of 22.8 and a sample standard deviatio
natima [27]

Answer:

We conclude that the population mean is 24.

Step-by-step explanation:

We are given the following in the question:

Population mean, μ = 24

Sample mean, \bar{x} = 22.8

Sample size, n = 100

Alpha, α = 0.05

Sample standard deviation, s = 8.3

First, we design the null and the alternate hypothesis

H_{0}: \mu = 24\\H_A: \mu \neq 24

We use Two-tailed z test to perform this hypothesis.

Formula:

z_{stat} = \displaystyle\frac{\bar{x} - \mu}{\frac{s}{\sqrt{n}} }

Putting all the values, we have

z_{stat} = \displaystyle\frac{22.8 - 24}{\frac{8.3}{\sqrt{100}} } = -1.44

We calculate the p-value with the help of standard z table.

P-value = 0.1498

Since the p-value is greater than the significance level, we accept the null hypothesis. The population mean is 24.

Now, z_{critical} \text{ at 0.05 level of significance } = \pm 1.96

Since,  the z-statistic lies in the acceptance region which is from -1.96 to +1.96, we accept the null hypothesis and conclude that the population mean is 24.

7 0
3 years ago
Add the first 12 terms of this sequence:<br> 15, 45, 135, 405, 1215, ...
UkoKoshka [18]

Answer:

Step-by-step explanation:

a₁ = 15

a₂/a₁ = 45/15 = 3

a₃/a₂ = 135/45 = 3

...

It is a geometric sequence with a common ratio r=3.

Sum of first 12 terms = a₁·(1-r¹²)/(1-r)

= 15·(1-3¹²)/(1-3)

= 15·(-531,441)/(-2)

= 3,985,800

7 0
3 years ago
20 Points!!! Help Plzz!! Hurry!!! Will Give Brainliest!!!!
Dahasolnce [82]

Answer:

i think its conditional. i think its conditional because your'e using outside references to come up with an explanation. i hope this helps. good luck.

Step-by-step explanation:


6 0
3 years ago
Sam thinks that his MP2 average grade will be an 80. He received the following scores: 90, 80, 75, 90, 85. Is he correct?
strojnjashka [21]

Answer:

8.4

Step-by-step explanation

7 0
3 years ago
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