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julsineya [31]
3 years ago
9

In school ,there are 3 girls for every 2 boys . There are 650 students in total . How many students are girls

Mathematics
1 answer:
EastWind [94]3 years ago
6 0

Answer:

390 girls.

Step-by-step explanation:

\frac{3}{5} of 650 is 390.

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poizon [28]

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a. H_{0}: u1≤u2

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b P<0.05   rejected H

Step-by-step explanation:

College High School

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The mean is the average . the sum of number over the number of observation

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x2=487

s.d1=59.42

s.d2=51.74

n1=16

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Determine the hypothesis

H_{0}: u1≤u2

H_{a} :u1>u2

find the degree of freedom(\frac{s1^2}{n1} +\frac{s2^2}{n2} )^2/(\frac{s1^2}{n1} )^2/n1-1+(s2^2/n2)^2/n2-1\\\\(\frac{59.42^2}{16} +\frac{51.7476^2}{12} )^2/(\frac{59.42^2}{16} )^2/16-1+(51.74^2/12)^2/12-1

25

p-value is the probability of obtaining the value of the test statistics. In the column of t-value in the row df=25

0.025<P<0.05

if the P value is actually less than or the same as the significant level, then the null hypothesis is rejected

P<0.05   rejected H

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In a ten pin bowling the highest possible score in a single game is 300. At one point in the season, John had an average score o
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Answer:

John need to get 293 in his next game to bring his average up to 183.

Step-by-step explanation:

John starts with N games played and averaging 177 points per game.

In game N+1, John scored 199 points.

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We need to know what score John needs in game 23 to bring his average to 183.

\frac{177*21 + 199+Y}{23}=183\\3916+Y=4209\\Y=293\\

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