TYPE YOUR ANSWER

An unknown microbe with below result tests is identified Staphylococcus. ( to get to genus level). BASED ON RESULTS:

Discuss the degree of confidence you have regarding your identification (were there any tests that were challenging to interpret / what additional tests would confirm your identification/ Do all the characteristics of your microbe align with your observations?

A.) A transect is an archaeological study area that is 1/5 mile wide and 1 mile long. A site in a transect is the location of a significant archaeological find. Let x represent the number of sites per transect. In a section of Chaco Canyon, a large number of transects showed that x has a population variance ?² = 42.3. In a different section of Chaco Canyon, a random sample of 22 transects gave a sample variance s² = 49.1 for the number of sites per transect. Use a 5% level of significance to test the claim that the variance in the new section is greater than 42.3. Find a 95% confidence interval for the population variance.

What is the level of significance?

Find the value of the chi-square statistic for the sample. (Round your answer to two decimal places.)

What are the degrees of freedom?

Find the requested confidence interval for the population variance. (Round your answers to two decimal places.)

lower limit=

upper limit=

B.) Let x = age in years of a rural Quebec woman at the time of her first marriage. In the year 1941, the population variance of x was approximately ?² = 5.1. Suppose a recent study of age at first marriage for a random sample of 41 women in rural Quebec gave a sample variance s² = 3.0. Use a 5% level of significance to test the claim that the current variance is less than 5.1. Find a 90% confidence interval for the population variance.

What is the level of significance?

Find the value of the chi-square statistic for the sample. (Round your answer to two decimal places.)

What are the degrees of freedom?

Find the requested confidence interval for the population variance. (Round your answers to two decimal places.)

lower limit =

upper limit =

C.) The fan blades on commercial jet engines must be replaced when wear on these parts indicates too much variability to pass inspection. If a single fan blade broke during operation, it could severely endanger a flight. A large engine contains thousands of fan blades, and safety regulations require that variability measurements on the population of all blades not exceed ?² = 0.18 mm². An engine inspector took a random sample of 81 fan blades from an engine. She measured each blade and found a sample variance of 0.32 mm². Using a 0.01 level of significance, is the inspector justified in claiming that all the engine fan blades must be replaced?

What is the level of significance?

Find the value of the chi-square statistic for the sample. (Round your answer to two decimal places.)

What are the degrees of freedom?

Find a 90% confidence interval for the population standard deviation. (Round your answers to two decimal places.)

lower limit            mm

upper limit           mm

D.) Jim Mead is a veterinarian who visits a Vermont farm to examine prize bulls. In order to examine a bull, Jim first gives the animal a tranquilizer shot. The effect of the shot is supposed to last an average of 65 minutes, and it usually does. However, Jim sometimes gets chased out of the pasture by a bull that recovers too soon, and other times he becomes worried about prize bulls that take too long to recover. By reading journals, Jim has found that the tranquilizer should have a mean duration time of 65 minutes, with a standard deviation of 15 minutes. A random sample of 7 of Jim's bulls had a mean tranquilized duration time of close to 65 minutes but a standard deviation of 26 minutes. At the 1% level of significance, is Jim justified in the claim that the variance is larger than that stated in his journal? Find a 95% confidence interval for the population standard deviation.

What is the level of significance?

Find the value of the chi-square statistic for the sample. (Round your answer to two decimal places.)

What are the degrees of freedom?

Find the requested confidence interval for the population standard deviation. (Round your answers to two decimal place.)

lower limit            mm

upper limit           mm

Course Learning Outcomes-Covered
• Demonstrate a solid understanding of decision making process for complex issues pertaining to business environment both internally and externally. (1.2)
• Explain critical thinking and cognitive psychology as it pertains to analyze and synthesize information for problem solving and decision making. (2.7)
• Identify and analyze different perspectives on understanding problems for different situations. (3.1)
..

Assignment Instructions:
• Log in to Saudi Digital Library (SDL) via University’s website
• On first page of SDL, choose “English Databases”
• From the list find and click on EBSCO database.
• In the search bar of EBSCO find the following article:
Title: “The elements of good judgement- How to improve your decision-making”
Author: Sir Andrew Likierman, Professor, London Business School
Date of Publication: January–February 2020  
Published: Harvard Business Review
..

Assignment Questions: (Marks 05)
1. Read the attached article titled as “The elements of good judgement- How to improve your decision-making” by Sir Andrew Likierman, published in Harvard Business Review, and answer the following Questions: [5 Marks]
a. Summarize the article and explain the main issues discussed in the article. (In 600-700 words)
b. What do you think about the article in relations to what you have learnt in the course about improving decision-making and problem solving skills? Use additional reference to support you argument. (In 300-500 words)

Paired-/Related Samples T-test

Use it to test whether there is a difference between the two conditions(note: conditions must be RELATED-participants provide in each condition).

You are interested in the relationship satisfaction of young adults before and after they go off to college/university, which separates them from their sweetheart. You asked four couples to rate the satisfaction of their relationship (on a scale of 0-50) before leaving for school and then again after a semester. Here are the data:

Pair Before After

1 40 32

2 38 31

3 36 30

4 42 31

1. State the null and alternative hypotheses as well as your criterion:

2 .State your assumptions

3. Calculate difference scores, the sum of difference scores and the sum of difference scores squared:

4. Calculate t

5. Figure out your degrees of freedom and use this to find the critical t value

6. Reject or fail-to-reject the null hypothesis and state your conclusions.

Listed below are student evaluation ratings of​ courses, where a rating of 5 is for​ "excellent." The ratings were obtained at one university in a state. Construct a confidence interval using a 99% confidence level. What does the confidence interval tell about the population of all college students in the​ state?

3.8, 3.0, 4.0, 4.7, 2.9, 4.1, 3.4, 5.0, 4.8, 3.9, 4.2, 4.0, 3.4, 4.2, 3.6

What is the confidence interval for the population mean muμ​?

Listed below are student evaluation ratings of​ courses, where a rating of 5 is for​ "excellent." The ratings were obtained at one university in a state. Construct a confidence interval using a 98​% confidence level. What does the confidence interval tell about the population of all college students in the​ state? 3.5​, 3.0​, 4.3​, 4.8​, 3.1​, 4.1​, 3.4​, 4.5​, 4.8​, 4.5​, 4.3​, 3.8​, 3.1​, 4.2​, 3.7

What is the confidence interval for the population mean μ​?

Listed below are student evaluation ratings of​ courses, where a rating of 5 is for​ "excellent." The ratings were obtained at one university in a state. Construct a confidence interval using a 95​% confidence level. What does the confidence interval tell about the population of all college students in the​ state? 3.8​, 2.9​, 3.9​, 4.7​, 2.9​, 4.3​, 3.6​, 4.8​, 4.6​, 4.2​, 4.1​, 3.8​, 3.2​, 4.1​, 3.8 What is the confidence interval for the population mean u​?

Covid-19 global economic pandemic has negatively affected economies as a whole at the global, national and regional levels. The novel effects of the fluidity of Covid-19 appears to continue to have negative impacts on the macro business model as the global recession seems to be inevitable. You are working as a macroeconomist in economic affairs in your local country, and you are tasked with analyzing the impact of Covid-19 on the economy and you are required to prepare notes on what specific government policies can be implemented as a stimulus package to jump-start the economy savings and investment market. The team meeting will be held in 3 days from the date of the assignment and because of limitation of time the Chief economist has given you the following guidelines: (a) You are required to identify four (4) key macroeconomic issues from the impact of Covid-19, (b) For each issue in (a) explain in detail what specific government policy would you implement (c) What would be the rationale for your choice of policy and (d) Your answer should be accompanied by relevant diagrams where possible.

ANOVA

Part 1—A study compared five groups with six observations per group. An F statistic of 5.13 was reported.

A.) Give the degrees of freedom for this statistic and be specific about which part you are referencing, numerator or denominator.

B.) Find the P-value associated with this F-statistic. Show your calculator command in the space provided.

Part 2—A study to compare four groups took random samples from each population of interest of sizes 38, 42, 21, and 45. The corresponding sample standard deviations are 2.5, 1.4, 2.7, and 3.1 respectively.

A.) Is it reasonable to use the assumption of equal standard deviations when we analyze these data? Explain your answer.

B.) Is it reasonable to believe that we have met the Normal condition when we analyze these data? Explain your answer.

1. You are attempting to identify genes involved in osmotic stress response in Bacillus atrophaeus, a Gram positive endospore former. For your work, you set up a chemostat (continuous) culture. You remove two samples of culture, expose one to a high salt concentration, wait five minutes, and then extract all their mRNA. You then label the control with a green fluorescent die, the experimental with a red fluorescent dye, and then hybridize the mixture to a microarray. Following analysis, the microarray reader generates a list of ratios of fluorescence of the spots on the array calculated as red vs. green. The expression ratios of the first five genes (of many thousands!) are as follows:

Gene A: 1.002

Gene B: 34.271

Gene C: 0.260

Gene D: 27.930

Gene E: 0.997

a. At what stage of growth are your cells in the chemostat?

b. Imagine you repeated the above experiment every day for a week. How might your results compare if done using cells from a continuous culture (as above) vs. from a batch culture? Explain.

c. Based on the microarray data, which gene(s) might be involved in stress response to salt?

d. Which gene(s) might be involved in constitutive (background, needed all the time) functions?

e. Which gene(s) might be involved in a process not essential to survival during times of stress?

f. Confident you have identified a number of genes involved in protecting B. atrophaeus from salt stress response, you decide to begin by studying one further. How might you genetically engineer B. atrophaeus to demonstrate the involvement of this gene in stress response to salt?