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Natalka [10]
3 years ago
5

A coed little league team had 18 players. Even though it was raining, half the girls and one third of the boys showed up for a g

ame, but these seven players went home when the game was canceled. How many girls were on the team? Please help.

Mathematics
1 answer:
dmitriy555 [2]3 years ago
4 0
There are 6 girls on the team.

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The mean number of English courses taken in a two–year time period by male and female college students is believed to be about t
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Answer:

Step-by-step explanation:

This is a test of 2 independent groups. The population standard deviations are not known. it is a two-tailed test. Let m be the subscript for the number of English courses taken by male students and f be the subscript for the number of English courses taken by female students.

Therefore, the population means would be μm and μf.

The random variable is xm - xf = difference in the sample mean number of English courses taken by male and female students.

We would set up the hypothesis.

The null hypothesis is

H0 : μm = μf H0 : μm - μf = 0

The alternative hypothesis is

H1 : μm ≠ μf H1 : μm - μf ≠ 0

Since sample standard deviation is known, we would determine the test statistic by using the t test. The formula is

(xm - xf)/√(sm²/nm + sf²/nf)

From the information given,

xm = 3

xf = 4

sm = 0.8

sf = 1

nm = 29

nf = 16

t = (3 - 4)/√(0.8²/29 + 1²/16)

t = - 11.82

The formula for determining the degree of freedom is

df = [sm²/nm + sf²/nf]²/(1/nm - 1)(sm²/nm)² + (1/nf - 1)(sf²/nf)²

df = [0.8²/29 + 1²/16]²/[(1/29 - 1)(0.8²/29)² + (1/16 - 1)(1²/16)²] = 0.00715/0.00027781093

df = 25.7

Approximately, df = 26

We would determine the probability value from the t test calculator. It becomes

p value = 0.00001

Assuming a level of significance of 0.05, we would reject the null hypothesis because the p value, 0.00001 is < 0.05

Therefore, we can conclude that the means are not statistically the same.

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How can you quickly determine the number of roots a polynomial will have by looking at the equation?
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Suppose we have a generic polynomial of the form:
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You must observe the term of the polynomial with greater exponent.
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3 years ago
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brainliest for correct answer A triangle has interior angle measures 28 and 32, please find the 3rd interior angle and two exter
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Answer:

120

Step-by-step explanation:

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