Explain what is meant by a welfare state. Discuss recent trends in the size of welfare states.

36. Explain what the technique known as soft state is and how it applies to ARP and the ARP cache.

5. (a)A sample of 12 of bags of Calbie Chips were weighed (to the nearest gram), and listed, here as follows.

219, 226, 217, 224, 223, 216, 221, 228, 215, 229, 225, 229 Find a 95% confidence interval for the mean mass of bags of Calbie Chips.

[9 marks]

(b) Professor GeniusAtCalculus has two lecture sections (A and B) of the same 4th year Advanced Calculus (AMA 4301) course in Semester 2. She wants to investigate whether section A students maybe ”smarter” than section B students by comparing their perfor- mances in the midterm test. A random sample of 12 students were taken from section A, with mean midterm test score of 78.8 and standard deviation 8.5; and a random sample of 9 students were taken from section B, with mean midterm test score of 86 and standard deviation 9.3. Assume the population standard deviations of midterm test scores for both sections are the same. Construct the 90% confidence interval for the difference in midterm test scores of the two sections. Based on the sample midterm test scores from the two sections, can Professor GeniusAtCalculus conclude that there is any evidence that one section of students are ”smarter” than the other section? Justify your conclusions.

[8 marks]

(c) The COVID-19 (coronavirus) mortality rate of a country is defined as the ratio of the number of deaths due to COVID-19 divided by the number of (confirmed) cases of COVID-19 in that country. Suppose we want to investigate if there is any difference between the COVID-19 mortality rate in the US and the UK. On April 18, 2020, out of a sample of 671,493 cases of COVID-19 in the US, there was 33,288 deaths; and out of a sample of 109,754 cases of COVID-19 in the UK, there was 14,606 deaths. What is the 92% confidence interval in the true difference in the mortality rates between the two countries? What can you conclude about the difference in the mortality rates between the US and the UK? Justify your conclusions. [8 marks]

Problem 3: Electric Cars (No StatCrunch Data Set)

According to both a Consumer Report’s and a AAA survey, about 1 in 5 Americans will buy an electric car as their next vehicle. To test this claim, an independent surveyor obtained records for 2018 car sales. The surveyor generated a random sample of 285 car sales and found that 80 of these new car purchases were of electric cars.

1. Using a = 0.05, is there sufficient evidence to conclude that the proportion of Americans who purchased an electric car is different from 0.2? Conduct a full hypothesis test by following the steps below. Enter an answer for each of these steps in your document.

1. Define the population parameter in one sentence.
2. State the null and alternative hypotheses using correct notation.
3. State the significance level for this problem.
4. Calculate the test statistic “by-hand.” Show the work necessary to obtain the value by typing your work and provide the resulting test statistic. Do not round during the calculation. Then, round the test statistic to two decimal places after you complete the calculation.
5. Calculate the p-value using the standard Normal table and provide the answer. Use four decimal places for the p-value.
6. State whether you reject or do not reject the null hypothesis and the reason for your decision in one sentence (compare your p-value to the significance level to do this).
7. State your conclusion in context of the problem (i.e. interpret your results and/or answer the question being posed) in one or two complete sentences.

Use StatCrunch (Stat → Proportion Stats → One Sample → with Summary) to verify your test statistic and p-value. Copy and paste this box into your document.

The two rows of data below come from recorded weights of young mice raised on two different diets, labeled S1 and S2. Use these two datasets to address the following questions.

a) Imagine you want to conduct a conventional parametric test of H0: μ1 = μ2 versus H1: μ1 not equal to μ2. What test
would you use, what assumption(s) is(are) required for the test you will use, show how you examine the
assumption(s), and clearly state your conclusions from your examination of the assumption(s).
b) Test H0: μ1 = μ2, and clearly state your conclusion.
c) If the true difference in the mean values is 2.0, what is the power of the test given that α = 0.05?
d) If the true difference in the mean values is 1.0 and α = 0.05, what sample size is required to detect a
difference in means of 1.0 if the power of the test must be at least 0.9?
e) Repeat the test of H0: μ1 = μ2 using a nonparametric test and state your conclusion.

In fall 2019, students in the 2 p.m. section of my Data Analysis class had an average height of 66.6 inches, while the average height in the 5 p.m. section was 64.6 inches. Are the average heights of the two sections significantly different at 10% level of significance? Assume the the standard deviation of both populations are unknown but equal. Here are the data:

2 pm 5 pm

69 68

70 72

66 67

63 68

68 69

70 67

69 61

67 59

62 62

63 61

76 69

59 66

62 62

62 62

75 61

62 70

72

63

a) What is the appropriate test you can use to test the claim?

b) What are the null and alternative hypotheses for this test?

c) What is your conclusion?

There are 50 students in a classroom at UT-Almost. Thirty of these students started as freshmen at UTA; the rest are transfers. The transfer students are split evenly between business majors and liberal arts majors. the total number of business majors is 25. (use for both questions)

#13 – If we randomly selected a single student, what is the probability he/she will be either a liberal art major or a transfer student?

ANSWER:

#16 – Suppose we randomly selected two students using this process: We take 40 envelopes and insert a slip of paper (either red or white) into each one. Each envelope is then sealed and then placed in a big box from which students draw one envelope each. The student who draw envelopes with red slips inside them are selected. Two of the envelopes contain red slips; the rest contain white. What is the probability that both students selected will be transfers?

ANSWER:

Write in detail about:

1. The definition, types and causes/etiology of UTI. should be as an essay the word limit is not less than 400 word

Many organizations have been accused of using suppliers which engage in unsafe labor practices (i.e., Apple procuring tin) or unsafe components or methods (i.e., lead paint on toys made for Mattel). State your position regarding the degree to which “end use organizations” (i.e, Apple, Mattel, Walmart) should be responsible for the problems their suppliers create. Then explain WHY you take this position – i.e., justify your position.