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3 years ago

PLEASE HELP WILL MARK BRANIEST IF RIGHT

Mathematics

1 answer:

Katarina [22]3 years ago

8 0

I think the increasing is -2,1 and 0,1 and the decreasing is -1,0.5 and -2,2.5

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A group of statistics students decided to conduct a survey at their university to find the average (mean) amount of time student

Butoxors [25]

Answer: $(21.541,\ 23.059)$

Step-by-step explanation:

The confidence interval for population mean is given by :-

$\overline{x}\pm z_{\alpha/2}\dfrac{\sigma}{\sqrt{n}}$

Given : Sample size : $n=240$ , which is a large sample , so we apply z-test .

Sample mean : $\overline{x}=22.3$

Standard deviation : $\sigma= 6$

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

Critical value : $z_{\alpha/2}=1.960$

Now, a confidence interval at the 95% level of confidence will be :-

$22.3\pm(1.960)\dfrac{6}{\sqrt{240}}\\\\\approx22.3\pm0.759\\\\=(22.3-0.759,\ 22.3+0.759)\\\\=(21.541,\ 23.059)$

7 0

3 years ago

Fire disturbance of terrestrial biomes is one of the primary factors in non-native plant species growth. A 2014 study by Pec and

Amiraneli [1.4K]

Answer:

Step-by-step explanation:

answer is attached below

7 0

3 years ago

Read 2 more answers

HELP 7TH MATH GIVING BRAINLIEST

patriot [66]

Answers

1)4.88 inches

2)4.148 inches

3)68%

4)147.06%

5 0

2 years ago

Read 2 more answers

PLZZ HELP I NEED HELP

Mkey [24]

Step-by-step explanation:

1) let the number=x

six times a number=6x

Condition:

6x+4=22

2) eleven times a number=11x

Condition:

11x-5=50

3) 9 times a number=9x

Condition:

9x-7=-16

Note:if you need to ask any question please let me know.

3 0

2 years ago

Write the number in 2 equivalent forms as a fraction, decimal, or percent.0.40

KIM [24]

Answer:

2/5 or 40%

Step-by-step explanation:

.40 is 40 hundredths or 40/100

40/100 can be reduced to 20/50 and reduced again to 10/25 and one more time to 2/5

Percentages are fractions out of 100 so 40/100 would be 40%.

5 0

2 years ago