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salantis [7]
3 years ago
10

. Formulate the hypotheses that can be used to determine whether the sample data support the hypothesis that students show a hig

her population mean math score on the SAT if their parents attained a higher level of education. population mean math score parents college grads. population mean math score parents high school grads. _____ _____ b. What is the point estimate of the difference between the means for the two populations
Mathematics
1 answer:
Vikki [24]3 years ago
4 0

Answer:

Following are the responses to the given question:

Step-by-step explanation:

For point a:

Following are the null and alternative hypotheses:

H_0 : \mu_1 \leq \mu_2\\\\H_1 : \mu_1 > \mu_2

For point b:

By using the Excel we obtained the output of the 2 sample t-test that is defined in the attached file.  

These point estimately are the difference among the mean for the two populations:

\to \mu_{\bar{x_1}-\bar{x_2}} =  \mu_{\bar{x_1}}-\mu{\bar{x_2}} ={\bar{x_1}-\bar{x_2}}=573-491=82

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Answer: 8

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7 0
3 years ago
A farmer raises only ducks and pigs. There are 55 animals in all on his farm, and 146 legs.
nordsb [41]

Answer:

Number of ducks = 37

Number of pigs = 18

Step-by-step explanation:

Let,

x be the number of ducks

y be the number of pigs

According to given statement;

x+y=55     Eqn 1

2x+4y=146     Eqn 2 (As ducks will have 2 legs and pigs will have 4)

Multiplying Eqn 1 by 2

2(x+y=55)

2x+2y=110    Eqn 3

Subtracting Eqn 3 from Eqn 2

(2x+4y)-(2x+2y)=146-110

2x+4y-2x-2y=36

2y=36

Dividing both sides by 2

\frac{2y}{2}=\frac{36}{2}\\y=18

Putting y=18 in Eqn 1

x+18=55

x = 55-18

x = 37

Hence,

Number of ducks = 37

Number of pigs = 18

8 0
3 years ago
Find the equation of the line that contains the given point and is parallel to the given line. Write the equation in slope-inter
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Answer:

Step-by-step explanation:

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3 years ago
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stellarik [79]

Answer: 153.86cm

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Back to the formula

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Substitute for each value

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