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sineoko [7]
3 years ago
9

A. 0.333 B. 6 C. 0.667 D. 3

Mathematics
1 answer:
kow [346]3 years ago
8 0

c

Answer:

Step-by-step explanation:

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Two samples each of size 25 are taken from independent populations assumed to be normally distributed with equal variances. the
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n_1=25, n_2=25\\ \bar{X_1}=35.5, \bar{X_2}=33\\ s_1=3, s_2=4

Pooled Combined Variance s_p=12.5

Test Statistic:

t=\frac{\left(\bar{X_1}-\bar{X_2}\right)}{s_p\sqrt{\frac{1}{n_1}+\frac{1}{n_2}}}

t=\frac{\left(35.5-33\right)}{12.5\sqrt{\frac{1}{25}+\frac{1}{25}}}

\left|t\right|=0.01414

Degrees of freedom = n_1+n_2-2=25+25-2=48

\alpha =0.05

t-Critical =t_{\alpha /2, n_1+n_2-2}=t_{0.025, 48}=-2.0206 \\Table value=|t|=2.0206\\|t|=2.0206

The table value is greater than the calculated value.

Thus we accept H0.

8 0
3 years ago
If you add up Jasford and Jasmines ages you get 35. If Jasford is three years older than Jasmine, how old is Jasmine?
a_sh-v [17]
It is 16 I’ve done this question before
8 0
3 years ago
How many ways can a president, vice president, and secretary be selected from a class of 30 students? a. 90 b. 2,068 c. 4,060 d.
Ad libitum [116K]

Answer:

the answer to your question should be 2,068

Step-by-step explanation:

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7 0
2 years ago
What's the proportional relationship? I've totally forgot how to do this aaa​
lubasha [3.4K]

Answer: yes it has a proportional relationship

Step-by-step explanation: Well yes it is proportional because it goes through the orgin and that is what it is if it goes through the orgin (0,0) it means it has a proportional relationship hope this helped:)

6 0
3 years ago
In a cohort of 35 graduating students, there are three different prizes to be awarded. If no student can receive more than one p
sweet [91]

We have been given in a cohort of 35 graduating students, there are three different prizes to be awarded. We are asked that in how many different ways could the prizes be awarded, if no student can receive more than one prize.

To solve this problem we will use permutations.

_{r}^{n}\textrm{P}={_{3}^{35}\textrm{P}}

We know that formula for permutations is given as

_{r}^{n}\textrm{P}=\frac{n!}{(n-r)!}

On substituting the given values in the formula we get,

{_{3}^{35}\textrm{P}}=\frac{35!}{(35-3)!}=\frac{35!}{32!}

=\frac{35\cdot 34\cdot 33\cdot 32!}{32!}\\
\\
=35\cdot 34\cdot 33=39270

Therefore, there are 39270 ways in which prizes can be awarded.


6 0
3 years ago
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