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oksano4ka [1.4K]
4 years ago
14

According to the empirical rule, if the data form a bell-shaped normal distribution, __________ of the observations will fall wi

thin two standard deviations around the mean.
Mathematics
1 answer:
Kaylis [27]4 years ago
5 0

Answer:

95%

Step-by-step explanation:

The empirical rule states that if data follows normal distribution then the percentage of observations falls within one, two and three standard deviation around the mean are

i) 68% falls within one standard deviation

ii) 95% falls within two standard deviation

iii) 99.7% falls within three standard deviation.

Hence 95% of the observations will fall within two standard deviations around the mean if the data follows normal distribution.

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The following table shows the salary of 7 people in an office last year.
kotegsom [21]

Answer:

a.  £24,714.29

b. £16,833.33

Step-by-step explanation:

The calculation of mean income is given below:-

Mean income = Total addition of salaries ÷ Number of workers

= £9,500 + £25,000 + £13,250 + £72,000 + £12,750 + £29,500 + £11,000

= £173,000 ÷ 7

= £24,714.29

Now,

the Mean income excluding Deva's salary:

= Formula of Mean income

= Total addition of salaries excluding Deva salary ÷ Number of workers

= (£9,500 + £25,000 + £13,250 + £12,750 + £29,500 + £11,000) ÷ 6

= £101,000 ÷ 6

= £16,833.33

7 0
3 years ago
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bearhunter [10]
330 miles / 5.5 hours

= 54.54 miles/hour.
Glad I could help!
7 0
3 years ago
Please help will be marked BRAINLIEST!
AysviL [449]

Answer:

shorter base = 6 yd

longer base = 8 yd

area of playground = 42 yd^2

Step-by-step explanation:

The question tells you that the shorter side is equal to the width, which is 6 yds. The bases of the triangles on either side are 1 yd. Since there are two, add 1 twice to 6 (6+1+1). This gives you 8 yd for the longer base. You're right about the area, just use the trapezoid area formula: 1/2h(a+b).

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How do I do a multiplication targets or wheels ​
aleksklad [387]

Answer:

a

Step-by-step explanation:

do 2 x 2 you should get the right answer

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Corey deposited $1,500 in a savings account that earns simple interest
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