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Lena [83]
3 years ago
11

Indicate which of the following choices best identifies the hypothesis test. The league mean batting average is 0.280 with a kno

wn standard deviation of 0.06. The Rattlers and the Vikings belong to the league. The mean batting average for a sample of eight Rattlers is 0.210, and the mean batting average for a sample of eight Vikings is 0.260. There are 24 players on the Rattlers and 19 players on the Vikings. Are the batting averages of the Rattlers and Vikings statistically different?
Mathematics
1 answer:
Tamiku [17]3 years ago
4 0

Answer:

Step-by-step explanation:

Here we found out that the two samples are independent, so we can use independent t test for testing the average batting rattlers and Vikings

Independent group mean, the population standard deviation and / population variance known.

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Calculate AD and hence BD.
Vilka [71]

Answer:

AD = 15 cm , BD = 3 cm

Step-by-step explanation:

Δ ABC is similar to Δ ADE ( by the AA postulate )

then the ratios of corresponding sides are in proportion, that is

\frac{AD}{AB} = \frac{DE}{BC} ( substitute values )

\frac{AD}{12} = \frac{10}{8} ( cross- multiply )

8 × AD = 12 × 10 = 120 ( divide both sides by 8 )

AD = 15 cm

AB + BD = AD , that is

12 + BD = 15 ( subtract 12 from both sides )

BD = 3 cm

7 0
2 years ago
Pls can I have the workings too​
KengaRu [80]

Answer:

\frac{(3-2a)}{a^2}

Step-by-step explanation:

Given expression is,

\frac{3}{a^2}- \frac{2}{a}

First equalize the denominators of the fractions,

\frac{3}{a^2}-\frac{2a}{a^2}

Now combine the fraction as a single fraction,

\frac{(3-2a)}{a^2}

Since, we can not solve this fraction further, this will be simplified form of the given expression.

3 0
3 years ago
Three square root 3×6 square root six
salantis [7]

Answer:

The answer would be 76.36

Step-by-step explanation:

6 0
2 years ago
Read 2 more answers
The system of equations kx-5y = 2, 6x+2y = 7 has no solution, then k =
hoa [83]

Answer:

(d) -15

Step-by-step explanation:

Given system of equations are:

\begin{cases}kx-5y=2\\\\6x+2y=7\end{cases}

Since, given system of equations have no solution.

\therefore \frac{k}{6}=\frac{-5}{2} \neq\frac{2}{7}

\implies \frac{k}{6}=\frac{-5}{2}

\implies k=\frac{6(-5)}{2}

\implies k=\frac{-30}{2}

\implies k=-15

6 0
3 years ago
Two-step equations - integers
Andrews [41]
Question 1. -3 + v5 = 0
Work : -3 + 5v = 0
5v = 3 ( divide )
answer v = 3/5

Question 2. 1 - 7B = -20
work : -7b = -20 - 1
-7b = -21 ( divide )
answer b = 3

question 3 : -k - 5 = 0
work : -k = 5
answer : k = - 5

Question 4 : -1 + 8a = 129
work : 8a = 129 + 1
8a = 130 (divide )
answer a = 65/4

3 0
3 years ago
Read 2 more answers
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