design a method for synthesis of titanium based nanoparticles from Catharanthus roseus and mention name of few techniques for its characterization and discuss in detail about the application of designed nanoparticles for controlled drug delievery?
In: Mechanical Engineering
In: Economics
In: Finance
A survey of a sample of 26 hotels in New Orleans found that the
average hotel room rate s $88.42 with a standard deviation of $5.62
and another survey of 25 hotels in the Phoenix area found that the
average room rate is $80.61. Assume with a standard deviation of
$4.83. At α = 0.05, can it be concluded that there is a
significant difference in the rates?
Source: USA TODAY.
Make sure to state Ho, H1 and where the claim is
State the value of the test statistic
Calculate the p-value
Make a decision to reject Ho or fail to reject Ho
State your conclusion in words in the context of the claim
You may use your TI 84 but make sure to state the name of the test
you used.
When using calculator and when it comes to choose Yes or No for
pooled, keep it at the default No.
Here is what pooled means: If we assume that population variances
are equal we select YES and if we assume that population variances
are not equal, we select No. By default, use No unless if it is
specified otherwise.
In: Statistics and Probability
Annual expenditures for prescription drugs was $838 per person in the Northeast of the country. A sample of 60 individuals in the Midwest showed a per person annual expenditure for prescription drugs of $745. Suppose the population standard deviation is $300. Follow the steps below to develop a hypothesis test to determine whether the sample data support the conclusion that the population annual expenditure for prescription drugs per person is lower in the Midwest than in the Northeast.
Formulate the null and alternative hypotheses. State whether this is a one-tailed test (and if so, upper or lower tail) or a two-tailed test.
Suppose the significance level is α=0.05. Explain what this means.
Calculate the test statistic. (Hint: Is known or unknown?)
Calculate the p-value and make a decision to either reject H0 or to fail to reject H0.
Calculate the critical value(s). Use the test statistic then to make a decision to either reject H0 or to fail to reject H0.
State what your decision means in the context of the problem (prescription expenditure in the Midwest vs. the Northeast).
In: Statistics and Probability
You are about to set up a small business in the community service sector. Consider the organisation's objectives and write a 3 page paper outlining the professional and ethical standards to which your organisation would adhere. Use your imagination to fill any caps.
What external influences and data would inform the expectations you might have of your employees?
Explain how you ensure that the employees working in the organisation continuously upgrade their skills and how would determine the developmental needs of your employees.
How would you encourage employees to reflect upon their work practice, evaluate their own skills and learning needs and improve the organisation's professional practice?
In: Nursing
B. You have $ 5 million dollars to invest in stocks. You have decided to do so in three
firms. Following the example in class and in tabular form, divide the $ 5 million dollars
among the three firms and calculate your expected return on your portfolio.
In: Economics
After you graduate from university, you find a job in a company that produces good X. You are working in a competitive market. Your boss asks you to compute the price elasticity of demand, income elasticity of demand, cross-price elasticity of demand, and the price elasticity of supply. The question is: how your boss will benefit from computing each of these elasticities. Explain in detail with an example for each case.
I need the answer minimum 500 words.
In: Economics
SOLVE USING R. COPY AND PASTE R INPUT AND OUTPUT.
Fifteen turkey hens were randomly assigned to three groups of five. One group was given diet A, the second group diet B, and the third group diet C. We wish to know if there is a difference in the weight of eggs produced by the birds on these diets, and if so, which diet results in the largest eggs. The data are the mean weights of ten eggs from each bird. Check the normality and homogeneity assumptions first to see if you can use ANOVA.
Diet A 124 118 120 127 115
Diet B 98 100 95 102 105
Diet C 116 97 100 89 98
(a) Create a data frame called turkey where the first column is the Diet and the second column is the EggWeights.
(b) Test the normality assumption by running the Shapiro-Wilk Normality Test
shapiro.test(turkey.mod$residuals)
Is the normality assumption violated? Explain.
(c) Test the homogeneity assumption by running the Bartlett
Test
bartlett.test(EggWeights ~ Diet, data=turkey)
Is the homogeneity assumption violated? Explain.
(d) Run an appropriate test (ANOVA or Kruskal-Wallis test, whichever is most appro- priate) to test your appropriate null hypothesis. (Note: make sure you explicitly state what the null hypothesis is before running your anova and make sure that you explicitly state your conclusions with explanation!).
In: Statistics and Probability
In: Accounting