Paul wants to estimate the mean number of siblings for each student in his school. He records the number of siblings for each of 100 randomly selected students in the school. What is the parameter? Select the correct answer below: all the students in the school the 100 randomly selected students the specific number of siblings for each randomly selected student the mean number of siblings for all students in the school the mean number of siblings for the randomly selected students

CCA has stated in 2017 that 84.3 % of its students are first generation college students. Suppose you sample 15 CCA students and ask if they are first generation college students or not, counting the number of first generation students. a. Create a binomial probability distribution (table) for this situation. (Report answers accurate to 4 decimal places.)

BINOMIAL PROBABILITY TABLE:

k P(X = k)

0 8.6795E-13 Correct

1 6.99059E-11 Correct

2 2.627 Incorrect

3 6.1135 Incorrect

4 9.8478E-07 Correct

5 1.16329E-05 Correct

6 0.000104104 Correct

7 0.000718685 Correct

8 0.003858928 Correct

9 0.016115737 Correct

10 0.051919361 Correct

11 0.126716912 Correct

12 0.22679906 Correct

13 0.28102637 Correct

14 0.215564359 Correct

15 0.077163802 Correct

a. What is the probability that 11 students or less are first generation? 0.927270503

b. What is the probability that at least 7 students are first generation ? 0.000835471

c. What is the probability that 4 students will be first generation?

d. What is the probability that between 7-14 students are first generation (including 7 and 14)? 0.922719412 Correct

e. What is the probability that 7 students are NOT first generation?

The University of Arkansas recently approved out of state tuition discounts for high school students from any state. The students must qualify by meeting certain standards in terms of GPA and standardized test scores. The goal of this new policy is to increase the geographic diversity of students from states beyond Arkansas and its border states. Historically, 90% of all new students came from Arkansas or a bordering state. Ginger, a student at the U of A, sampled 180 new students the following year and found that 157 of the new students came from Arkansas or a bordering state. Does Ginger’s study provide enough evidence to indicate that this new policy is effective with a level of significance 10%? What would be the correct decision?

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Grades on a standardized test are known to have a mean of 940 for students in the United States. The test is administered to 436 randomly selected students in​ Florida; in this​ sample, the mean is 952.22 and the standard deviation ​(s​) is 101.52.

a) The​ 95% confidence interval for the average test score for Florida students is ​( 942.67​, 961.77​). ​(Round your responses to two decimal places.​)

b) Is there statistically significant evidence that Florida students perform differently than other students in the United​ States?

The​ 95% confidence interval for the average test score for Florida students does not include mu ​= 940​, so the null hypothesis that mu ​= 940 ​(that Florida students have the same average performance as other students in the United​ States) can be rejected at the​ 5% level.

c) Another 486 students are selected at random from Florida. They are given a​ 3-hour preparation course before the test is administered. Their average test score is 957.86 with a standard deviation of 89.30. The​ 95% confidence interval for the change in average test score associated with the prep course is ​( nothing​, nothing​). ​(Round your responses to two decimal places.​)

Particle A moves along an axis in the laboratory with velocity V = 0.3c. Particle b moves with velocity of V = .9c along the direction of motion of particle A.

What kinetic energy does the particle b measure for the particle A?

Calculate the Kf of Ag(NH3)2 + from

Ag+(aq) + e- ⇋ Ag(s) E0= 0.81 V

Ag(NH3)2+(aq) + e- ⇋ Ag(s) + 2NH3(aq) E0= 0.37 V

Block copy, and paste, the argument into the window below, and do a proof to prove that the argument is valid.

1. (p   • q)   •   (q ⊃   x)
2. ~x v ~s
3. n   v   s     : .    t ⊃ n

Derive the equations for a particle moving near the surface of the earth, given by

?̈= 2? cos ? ?̇

?̈= −2( cos ? ?̇ + ? sin ? ?̇)

?̈= −? + 2? sin ? ?̇

? = v/r; v=velocity; r-radius

where the earth’s rotational speed in the ?̂ direction is ?.