A small school has only two 4^th grade classes and two 5^th grade classes. Each year, students at the school take the Nebraska Test of Basic Skills (NTBS) in math and Language Arts. The Excel file, 745 Project Data, contains all of the scores for a certain class tracked over their 4^th and 5^th grade years.

1. Create a frequency distribution and cumulative frequency distribution of the 4^th Grade Math test scores for all of the students. Use 5 classes.
2. Create a histogram, frequency polygon, and ogive for the 4^th Grade Math test scores for all of the students.
3. Create a box-and-whiskers plot for the 5^th Grade LA test scores for all of the students.
4. Determine whether or not students in the two 4^th grade classes have the same average scores in math, and whether or not students in the two 4^th grade classes have the same average score in language arts. For both tests, use α = 0.05.
5. It has been observed that Crenshaw’s students don’t seem to do in well in math. To investigate that, for the 19 students who had Crenshaw in 5^th grade, determine whether or not their math scores decreased from 4^th to 5^th grades. Use α = 0.0 Do the same for the 17 students who had Davis in 5^th grade. What can you conclude from these tests?
6. On the other hand, Crenshaw’s students seem to excel in language arts. To investigate that, for the 19 students who had Crenshaw in 5^th grade, determine whether or not their language arts scores increased from 4^th to 5^th grades. Use α = 0.05. Do the same for the 17 students who had Davis in 5^th grade. What can you conclude from these tests?
7. On the basis of questions 4 through 6, what would you, as an administrator, recommend regarding Crenshaw and Davis?
8. Determine whether or not there is a relationship between the math scores and the LA scores in 4th grade, and if there is a relationship between the math scores and the LA scores in 5th grade. Use α = 0.05.

51% of students entering four-year colleges receive a degree within six years. Is this percent smaller than for students who play intramural sports? 123 of the 292 students who played intramural sports received a degree within six years. What can be concluded at the level of significance of αα = 0.01?

1. For this study, we should use Select an answer t-test for a population mean z-test for a population proportion
2. The null and alternative hypotheses would be:
   Ho: ? p μ  Select an answer > < ≥ ≠ ≤ =   (please enter a decimal)   
   H₁: ? p μ  Select an answer = ≥ > < ≠ ≤   (Please enter a decimal)

3. The test statistic ? z t  =  (please show your answer to 3 decimal places.)
4. The p-value =  (Please show your answer to 4 decimal places.)
5. The p-value is ? ≤ >  αα
6. Based on this, we should Select an answer accept fail to reject reject  the null hypothesis.
7. Thus, the final conclusion is that ...
   • The data suggest the population proportion is not significantly smaller than 51% at αα = 0.01, so there is sufficient evidence to conclude that the population proportion of students who played intramural sports who received a degree within six years is equal to 51%.
   • The data suggest the populaton proportion is significantly smaller than 51% at αα = 0.01, so there is sufficient evidence to conclude that the population proportion of students who played intramural sports who received a degree within six years is smaller than 51%
   • The data suggest the population proportion is not significantly smaller than 51% at αα = 0.01, so there is not sufficient evidence to conclude that the population proportion of students who played intramural sports who received a degree within six years is smaller than 51%.
8. Interpret the p-value in the context of the study.
   • There is a 51% chance of a Type I error.
   • There is a 0.12% chance that fewer than 51% of all students who played intramural sports graduate within six years.
   • If the sample proportion of students who played intramural sports who received a degree within six years is 42% and if another 292 such students are surveyed then there would be a 0.12% chance of concluding that fewer than 51% of all students who played intramural sports received a degree within six years.
   • If the population proportion of students who played intramural sports who received a degree within six years is 51% and if another 292 students who played intramural sports are surveyed then there would be a 0.12% chance fewer than 42% of the 292 students surveyed received a degree within six years.
9. Interpret the level of significance in the context of the study.
   • There is a 1% chance that the proportion of all students who played intramural sports who received a degree within six years is smaller than 51%.
   • If the population proportion of students who played intramural sports who received a degree within six years is 51% and if another 292 students who played intramural sports are surveyed then there would be a 1% chance that we would end up falsely concluding that the proportion of all students who played intramural sports who received a degree within six years is smaller than 51%
   • There is a 1% chance that aliens have secretly taken over the earth and have cleverly disguised themselves as the presidents of each of the countries on earth.
   • If the population proportion of students who played intramural sports who received a degree within six years is smaller than 51% and if another 292 students who played intramural sports are surveyed then there would be a 1% chance that we would end up falsely concluding that the proportion of all students who played intramural sports who received a degree within six years is equal to 51%.

CO2(g) + C(s) = 2 CO(g) a) Using the Bouduard reaction, calculate gas composition in a furnace under 1 atm total pressure and 1100 K. b) Under the same furnace conditions, is it possible to reduce VO to V by CO? ( VO + CO = V + CO2 ) C(s) + O2(g) = CO2(g) o GT = - 394100 – 0.84 T J/mol C(s) + ½ O2(g) = CO(g) o GT = - 111700 – 87.65 T J/mol V(s) + ½ O2(g) = VO (s) o GT = - 424700 + 80.04 T J/mol

Unknown has a molecular weight of 400. An experiment requires an incubation to be carried out with 1 μM of unknown. The incubation will be carried out in a total volume of 500 μL of culture medium. What volume of each of the stock solutions below (a – d) would you need to add to the incubation to give 1 μM of unknown? a. 1 mM b. 0.5% (w/v) c. 20 μg/dL d. 10 μg/mL e. Due to the toxicity of the solvent, the volume added cannot exceed 0.1% (v/v) in the final 500 μL of culture. Which of the stock solutions above COULD actually be used for this incubation?

The law regarding product liability has evolved over time.

(1) Describe the difference between what was required to find a manufacturer liable in negligence to a consumer for a defective product before and after the MacPherson v. Buick Motor Co. case.

(2) Describe the difference between what was required to find a manufacturer liable to a consumer for a defective product after MacPherson v. Buick Motor Co. and what is required under the legal doctrine of strict liability in contract.

(3) Describe the difference between what was required to find a manufacturer strictly liable for an injured consumer before and after the Greenman v. Yuba Power Products case.

From our bottle of wine; 3x 100 mL sample replicates were produced and the pH adjusted to pH 7.9 by addition of 4.0 mL of NH4OH (0.5 M) with phosphate buffer. The solution was then coloured with 1.0 mL of 2% (w/v) dye solution and 1.0 mL of 8% (w/v) K3Fe(CN)6 solution. The resulting solutions were left to stand for 15 minutes for colour development.

(v) This reaction is analogous to that shown in the lecture notes, yielding identical products. If phenol compounds are oxidised… what reagent is reduced? Write a generalised equation for this reaction. What is the role of the Fe3+ complex?

Consider a simple electrostatic capacitor constructed from two electrodes consisting of perfect conductors, where the electric charge Q on the positively-charged conductor is related to the potential difference V between the electrodes by Q=CV. Suppose the potential difference V of the capacitor is held fixed, by attaching its electrodes via very thin, perfectly conducting leads to the terminals of an ideal battery. Define a free energy G for the capacitor, such that dG=đW for work done by the external agent with the capacitor's voltage held at fixed potential difference V. Show that G may be regarded as a suitable Legendre transformation of the electrostatic energy U.

During 2018, a company has the following transactions:

i. Sells $30,000 worth of merchandise on credit. The company will collect the accounts in 2019.

ii. Records $3,000 in electricity expense for the month of December. Electricity bills are paid the next month.

iii. Purchases a $12,000 prepaid insurance policy that expires in 2020.

iv. Pays a $1,000 fine for dumping waste materials in a river.

v. Receives $20,000 in magazine subscription proceeds for 12 issues delivered to customers in 2019.

Which of the above transactions will result in a deferred tax asset?

ii and iv

i and iii

iii and iv

ii and v

why is the correct answer is ii and v

An LED has a forward voltage drop of 2.25 V. As seen in the figure, it is in series with: an AC source of V(t)=V0sin(2πft) with V0= 4.00 V, f=1 Hz, and a resistor R= 200 Ω

d. The whole flash:
1) If you were watching the LED, you would see it turn on and off with a period of 1s. During the 1s period, compute how long the LED is on (the time Δt of each pulse).
2) How much light energy is emitted during the entire LED light pulse? Hint: you first need to find the total photons emitted during the whole light pulse.

A container with mass m kg is dropped by a helicopter from height h km at time t=0, with zero velocity. from the outset, its fall is controlled by gravity and the force of air resitance, f(v)= -kv, where v is the current velocity of the container. in t seconds after the drop, a parachute opens, resulting in an increase of air resistance up to f(v) = -kv. determine the time t at which the container touches the ground. and its velocity at this moment. if m = 200 kg, h = 2000 m, t = 20 s, k = 10 kg/s, and k = 400 kg/s