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.

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

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:

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.  

TTT is a television ratings company. TTT announced that on 11^th of June 2020, for a specific program on DDD TV channel, 10% of all televisions in NY tuned to DDD TV channel. It is known that the similar specific program will be presented on 25^th of June 2020 on DDD TV channel. What is the probability that in a random sample of 20 television sets in NY , 3 or fewer would have been tuned to DDD TV channel? Find the mean and standard deviation. Explain your solution in detail.

English 1

The topic of this essay is a current issue facing African Americans today.

Write a 4-1/2 to 5-page formal academic essay in which you choose two documentary/news photographs, two paintings, or two advertisements to analyze in a closed-form essay. Your two visual texts should have enough in common to facilitate meaningful comparisons. Show these images in your essay (if you are analyzing videos, you’ll need to show screen captures), but also describe your two visual texts in detail to highlight what you want viewers to see and to provide a foundation for your analysis. For this closed-form analysis, choose several key points of contrast as the focus. Your thesis statement should make a claim about key differences in the way that your chosen visual texts establish their purposes and achieve their persuasive effects.

• What challenges do African Americans currently face?

• What are current issues about race equality and how do we improve our society’s approach to these issues?

• How are African Americans Discrimina Ted against in our society today?

• What are solutions to resolve racial discrimination against African Americans?