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Ulleksa [173]
3 years ago
12

A study was done to examine the personal goals of elementary school children. a random sample of 500 students was selected from

schools in the state of georgia. the students received a questionnaire regarding personal goals. they were asked what they would most like to do at school: get good grades, be popular, or be good at sports. the results are presented in the table, classified by the gender of the child. we wish to test the null hypothesis that gender and personal goal are independent. under the null hypothesis, the expected number of boys that would select "be good at sports" is
Biology
1 answer:
aleksley [76]3 years ago
3 0
Since we wish to test the null hypothesis that gender and personal goal are independent. Under the said null hypothesis, the expected number of boys that would select "be good at sports" would be the same more or less with the girls that would select "be good at sports". The difference in their means would be set to zero for this null hypothesis.
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-Listening to Earth - How is this related to plate boundaries?
leonid [27]

Listening to Earth is an article about the study of the plate boundaries using hydrophones which make noises and different sounds.

<u>Explanation:</u>

Listening to Earth is an article which was written about the studying of the plate boundaries by Dziak and his team. Since it is tough to send people to the bottom surface of the ocean, they made use of hydrophones making them listen to various sounds.

These sounds are made by the movement and the motions of the plate boundaries from their original position which many a times lead to the earthquakes.

7 0
3 years ago
PLS HELP! THANK U :,)
sladkih [1.3K]

Answer:

Yep C, seems like the most reasonable answer to the question.

8 0
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Suppose a population of flour beetles has 10,000 individuals. There are two alleles possible for the gene that determines body c
miss Akunina [59]

Answer:

0.75

Explanation:

Given frequency of the two alleles i.e "B" and "b" are equal .

As per Hardy–Weinberg equilibrium, sum of frequency of the two alleles is equal to one.

i.e p+ q= 1\\

Since p=q\\

p and q will be equal to 0.5

Frequency of genotype "BB"

= p^{2} \\= 0.5^{2} \\= 0.25

Frequency of genotype "bb"

= q^{2} \\= 0.5^{2} \\= 0.25

As per second equation of Hardy–Weinberg equilibrium,

p^{2} + q^{2} + 2pq=1

Substituting the values of p and q in above equation we get -

0.25+0.25+2pq=1\\2pq = 1-0.25-0.25\\2pq = 0.5

Red beetles have genotype BB and Bb

number of red beetles with genotype (BB)

= 0.25 * 10000\\= 2500

number of red beetles with genotype (BB)

= 0.5 * 10000\\= 5000

Total red beetles

2500+ 5000= 7500\\

Frequency of red beetles

= \frac{7500}{10000} \\= 0.75

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What is the function of the labeled part in both plant and animal cells?
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Mitochondria A. They act as the powerhouse to create energy.

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Which organ makes the proteins that clot the blood?
stepladder [879]
The liver is the organ that makes proteins that clot the blood.

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