You believe that requiring students to attend a series of presentations on study skills will improve their grades. You are concerned that boys and girls might react differently to such a series, and that students in grades 9 and 10 might react differently than those in grades 11 and 12. You set up an experiment involving 100 students in ninth and tenth grade and 100 students in eleventh and twelfth grade. (Assume there are equal numbers of girls and boys in each grade.) You intend to measure improvement based on pre- and post-treatment grade-point averages.

Describe the design of an experiment to help you determine if a set of presentations on study skills is effective in improving grades.

Answer:

Suppose you have 50 students and need to assign them to two groups of equal size. Describe a randomization procedure that would achieve this.

Answer:

Suppose you have 50 students and need to assign them to two independent groups. Describe a randomization procedure that would achieve this.

Answer:

Describe an appropriate method of analysis for the data you collect from this experiment.

Answer:

You believe that requiring students to attend a series of presentations on study skills will improve their grades. You are concerned that boys and girls might react differently to such a series, and that students in grades 9 and 10 might react differently than those in grades 11 and 12. You set up an experiment involving 100 students in ninth and tenth grade and 100 students in eleventh and twelfth grade. (Assume there are equal numbers of girls and boys in each grade.) You intend to measure improvement based on pre- and post-treatment grade-point averages a.

a. Describe the design of an experiment to help you determine if a set of presentations on study skills is effective in improving grades.

b. Suppose you have 50 students and need to assign them to two groups of equal size. Describe a randomization procedure that would achieve this.

c. Suppose you have 50 students and need to assign them to two independent groups. Describe a randomization procedure that would achieve this.

d. Describe an appropriate method of analysis for the data you collect from this experiment.

You believe that requiring students to attend a series of presentations on study skills will improve their grades. You are concerned that boys and girls might react differently to such a series, and that students in grades 9 and 10 might react differently than those in grades 11 and 12. You set up an experiment involving 100 students in ninth and tenth grade and 100 students in eleventh and twelfth grade. (Assume there are equal numbers of girls and boys in each grade.) You intend to measure improvement based on pre- and post-treatment grade-point averages a.

a. Describe the design of an experiment to help you determine if a set of presentations on study skills is effective in improving grades.

b. Suppose you have 50 students and need to assign them to two groups of equal size. Describe a randomization procedure that would achieve this.

c. Suppose you have 50 students and need to assign them to two independent groups. Describe a randomization procedure that would achieve this.

d. Describe an appropriate method of analysis for the data you collect from this experiment.

1. Suppose we perform a binomial experiment 50 times where the probability of success on any given trial is 0.20. Which of the following is correct?

1. μ = 10 and σ = 3.16

2. μ = 8 and σ = 3.16

3. μ = 10 and σ = 2.83

4. μ = 8 and σ = 2.83

2. Suppose the average number of Funko Pops owned by a Statistics instructor is 7 with a standard deviation of 2.3 Pops. What would be the z-score of Mr. James, who owns 13 Pops?

1. z = 13

2. z = 2.61

3. z = -2.61

4. z = 1.53

3. All of the following can be approximated using a normal distribution EXCEPT

1. The number of successful outcomes for a binomial experiment with 10 trails where the probability of success on any given trail is 0.85

2. The average sample mean for samples of size 20 from a population that is normally distributed

3. The average sample mean for samples of size 50 from a population that is strongly skewed to the left

4. The number of successful outcomes for a binomial experiment with 30 trails where the probability of success on any given trail is 0.25

(1)(A) Young's double slit experiment is one of the quintessential experiments in physics. The availability of low cost lasers in recent years allows us to perform the double slit experiment rather easily in class. Your professor shines a green laser (566 nm) on a double slit with a separation of 0.106 mm. The diffraction pattern shines on the classroom wall 4.0 m away. Calculate the fringe separation between the fourth order and central fringe.

(B)Working in lab class you shine a green laser (5.65 10² nm) onto a double slit with a separation of 0.280 mm. What is the distance between the first and second dark fringe that shines on the wall 2.20 m away?

(C)You shine an orange laser (587 nm) on a double slit in an experiment you perform in your physics lab. Measuring with a protractor you see that the interference pattern makes the first fringe at 11.0° with the horizontal. What is the separation between the slits?

(D)What is the separation between two slits for which 650 nm light has its first minimum at an angle of 31.5°?

A curious person decides to do an experiment in their apartment building. They take their bathroom scale into the elevator on the 15th floor of the highrise they live in. When the elevator is stationary, they step on the scale and it reads 532 N, as expected since this is the person's weight. When the elevator starts moving, the person looks at the scale and it reads 420 N. The combined mass of the person and the elevator is 795 kg.

(a) Explain why the reading on the scale is less than the person's weight.

(b) What is the elevator's acceleration (magnitude and direction) when the scale reads 420 N.

(c) In the next part of the experiment, the person chooses a different floor to travel to and then the scale reads 670 N. Did the person choose to go to a higher floor or a lower one? And what is the acceleration of the elevator?

(d) Using the calculations you made in parts (b) and (c), find the tension in the elevator cable when the scale read 420 N and 670 N.

(e) At one point during the experiment, the person looks at the scale and it reads 0 N. Explain how this is possible and what the person should do about it.

A Year 13 Statistics student was given an assignment where she had to design and conduct an experiment and analyse the data collected.

She decided to investigate whether being told that a quiz was easy or hard influenced the results of the quiz. All the students in a Year 9 class were given the same quiz after having been randomly allocated to one of three groups: Group 1 were told that it was a hard quiz, Group 2 were told it was an easy quiz and Group 3 were told nothing about the quiz. None of the students were told what the experiment was about.

She then carried out a randomisation test to compare the mean quiz marks for the three groups.

Which one of the following statements is false?

The response is the quiz mark.

There were 3 treatments; being told the quiz was easy, told it was hard or told nothing at all.

It was not possible to blind the students because they knew that they had been given a quiz.

The experiment used a completely randomised design.

The group that were told nothing about the quiz could act as the Control group.

For The introduction include

1) Background about bacteria. specifically the differences between gram + and gram - bacteria. Talk about B. subtilus and E. coli (what they are?)

2) Background on antibiotic resistance, How it formed and how is it affecting the society

3) State the objective of this experiment

4) predictions- please use what I wrote on the board. predictions need to be rationalized, not opinion oriented.

Please write this in order 1, 2, 3, 4. Make sure the organizations are good. also

- Include reference, literature reviews

-No question form

-Paragraph-wise

Methods

-Need to be PASSIVE, don't use I, you, we, the professor

-Make sure you use the correct and precise term

-Please don't divide them into sections, need to be in paragraph

-Need to mention the type of antibiotic used, bacterias used

-Treat this like a real lab experiment

-Don't mention we wait a week. After incubation, it's the measure of ZOI. and that's it.

-Don't be excessive. Only write enough so someone could replicate your experiment.

The mathematics department is considering revising how statistics is taught. In order to see if their changes will be effective in increasing student performance, they decided to run a Simulated Experiment. Previous semesters have that 10% of students receive an A in the class, 40% receive a B, and 20% receive a C. How would you assign values so you can use a Random Digit Table to run this experiment?

a) Assign 1 digit numbers as follows: 0 is A; 1, 2, 3, 4 are B; 5, 6 are C; 7, 8, 9 are D.

b) Assign 1 digit numbers as follows: 0 is A; 1, 2, 3, 4 are B; 5, 6 are C; 7, 8, 9 are other grades.

c) Assign 2 digit numbers as follows: 00-10 are A; 00-40 are B; 0-20 are C.

d) Assign 2-digit numbers as follows: 90-99 are A; 80-89 are B; 70-79 are C; 60-69 are D; and 00-59 are F.

e) This experiment cannot be simulated using a random digit table.