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3 years ago

Help fast 15 points need help fast

Mathematics

2 answers:

inessss [21]3 years ago

8 0

Answer:its -10 and 10 that is marked

Step-by-step explanation:

rosijanka [135]3 years ago

6 0

Answer:

#2: -10, 10

-10 < 10

Negative Ten is less than Positive Ten

#3: -12<-7

#4: 10>-3

Step-by-step explanation:

#2: There is a green mark on -10 and 10

-10 has a lower value than 10, so 10 is greater than -10

The inequality above would be written in word format

#3: -12 is lower in value then -7, so -12 would be less than -7

#4: 10 has a higher value than -3, so 10 is greater than -3

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Step-by-step explanation:

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3 years ago

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What is the answer to the equation -2x-8=-10

Oxana [17]

You need to get "x" by itself on one side

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4 years ago

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4 years ago

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3 years ago

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Construct a 95% confidence interval for the population mean, μ. Assume the population has a normal distribution. A random sample

GuDViN [60]

Answer: $(628.48,\ 661.52)$

Step-by-step explanation:

Given : Sample size : $n=16$ , which is a small sample (, 30) so we use t-test.

Sample mean : $\overline{x}=645 \text{ hours}$

Standard deviation : $\sigma = 31 \text{ hours}$

Significance level : $\alpha=1-0.95=0.05$

Critical value : $t_{n-1,\alpha/2}=2.131$

The confidence interval for population mean is given by :-

$\overline{x}\pm t_{n-1,\alpha/2}\dfrac{\sigma}{\sqrt{n}}\\\\=645\pm(2.131)\dfrac{31}{\sqrt{16}}\\\\\approx645\pm16.52\\\\=(645-16.52,\ 645+16.52)\\\\=(628.48,\ 661.52)$

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3 years ago