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3 years ago

Complete the statements about calculating mean using the data set: 4, 6, 1, 9, 12, 3, 11,2

Mathematics

1 answer:

ryzh [129]3 years ago

8 0

Answer: 6

Order the Numbers

Before: 4, 6, 1, 9, 12, 3, 11, 2

After: 1, 2, 3, 4, 6, 9, 11, 12

Add

1+2+3+4+6+9+11+12=48

Sum: 48

Divide

48÷8=6

Mean: 6

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What is the exponential regression equation that fits these data? y x 1 4 2 8 3 27 4 85 5 250 6 600

Volgvan

Answer:

its is C because the other ones are obvious wrong. So it has to be C plus i did this test.

Step-by-step explanation:

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3 years ago

A researcher wishes to estimate, with 9090% confidence, the proportion of adults who have high-speed Internet access. Her es

Sunny_sXe [5.5K]

Answer: a) Required minimum sample size= 219

b) Required minimum sample size= 271

Step-by-step explanation:

As per given , we have

Margin of error : E= 5% =0.05

Critical z-value for 90% confidence interval : $z_{\alpha/2}=1.645$

a) Prior estimate of true proportion: p=28%=0.28

Formula to find the sample size :-

$n=p(1-p)(\dfrac{z_{\alpha/2}}{E})^2\\\\=0.28(1-0.28)(\dfrac{1.645}{0.05})^2\\\\=218.213856\approx219$

Required minimum sample size= 219

b) If no estimate of true proportion is given , then we assume p= 0.5

Formula to find the sample size :-

$n=0.5(1-0.5)(\dfrac{z_{\alpha/2}}{E})^2\\\\=0.25(\dfrac{1.645}{0.05})^2\\\\=270.6025\approx271$

Required minimum sample size= 271

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3 years ago

Rabbits doubles every month. if you start with 2, how many will you have after 5 years

Illusion [34]

2.30584301E+18 rabbits will be around bc you have to double the number 60 times

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3 years ago

Find the median of the following set of data:

Troyanec [42]

Answer:

Step-by-step explanation:

The median is the middle value of the data set in ascending order. If there is no exact middle value then it is the average of the values either side of the middle.

Arrange the data in ascending order

48, 52, 54, 57, 57, 57, 61, 61, 65

↑

The median of the data set is 57 → b

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3 years ago

7. answer correct for brainliest

Vika [28.1K]

Answer:

4 7/20

Step-by-step explanation:

8 1/4 - 3 9/10

get a common denominator of 20

8 1/4 *5/5 - 3 9/10 *2/2

8 5/20 - 3 18/20

borrow 1 from the 8 in the form of 20/20

7 +20/20 + 5/20 - 3 18/20

7 25/20 - 3 18/20

4 7/20

5 0

2 years ago

Read 2 more answers