4. Do people find hairy spider more scary than non-hairy spiders? To find out, 20 people were randomly assigned to two groups of 10. One group viewed hairy spiders and the other group viewed a very similar, but non-hairy, spider. Each person was asked to rate the spider she or he viewed on a scariness scale from 1 to 10 (with 10 being the most scary). The results were as follows:

Hairy Non-hairy 51 73 84 85 95 96 96 96

10 7 10 8

Note that the data is not normally distributed and the two populations are not related. Perform an appropriate hypothesis test to answer the question.

A student researcher compares the heights of American students and non-American students from the student body of a certain college in order to estimate the difference in their mean heights. A random sample of 18 American students had a mean height of 69.9inches with a standard deviation of 2.79inches. A random sample of 12 non-American students had a mean height of 63.8 inches with a standard deviation of 2.31 inches. Determine the 98% confidence interval for the true mean difference between the mean height of the American students and the mean height of the non-American students. Assume that the population variances are equal and that the two populations are normally distributed.

Step 1 of 3 :  

Find the point estimate that should be used in constructing the confidence interval.

You are interested in determining the distribution of income in a county (central tendency, as well as variability). Costs prohibit a complete census. You must determine a sampling methodology for the study. The population is diverse, with a significant homeless population, both English and non-English speakers, and a broad spectrum of incomes, including a small, but very wealthy gated community. Identify the ethical issues involved:

Choices:

The analysis and reporting should consider the impact of extreme values in the data.

Consider both the impact of extreme values and methods of including homeless and non-English speakers.

There are none. It’s a simple mathematical operation.

In order to get a random and representative sample, methods of including homeless and non-English speakers need to be considered.

A student researcher compares the heights of American students and non-american students from the student body of a certain college in order to estimate the difference in their mean heights. A random sample of 18 American students had a mean height of 70 inches with a standard deviation of 3.03 inches. A random
sample of 12 non-american students had a mean height of 66.1 inches with a standard deviation of 2.35 inches. Determine the 99% confidence interval for the true mean difference between the mean height of the American students and the mean height of the non-american students. Assume that the population variances are equal and that the two populations are normally distributed. Find the margin of error to be used in constructing the confidence interval.

1. Below are the data you collect, based on a prospective cohort study in which non-obese children were followed over 10 years. Children in the top 25th percentile of self-reported SSB consumption during the first year of the study were categorized as SSB consumers. All other children were categorized as non-SSB consumers. Blood was drawn from the children at enrollment, and all were tested for the presence of the genetic variant. Calculate the appropriate measures of the crude association between SSB consumption and obesity status, with 95% confidence intervals.

Bug-Off Exterminators provides pest control services and sells extermination products manufactured by other companies. The following six-column table contains the company’s unadjusted trial balance as of December 31, 2018.

The following information in a through h applies to the company at the end of the current year.

a. The bank reconciliation as of December 31, 2018, includes the following facts.

Reported on the bank statement is a canceled check that the company failed to record. (Information from the bank reconciliation allows you to determine the amount of this check, which is a payment on an account payable.)

b. An examination of customers’ accounts shows that accounts totaling $679 should be written off as uncollectible. Using an aging of receivables, the company determines that the ending balance of the Allowance for Doubtful Accounts should be $700.

c. A truck is purchased and placed in service on January 1, 2018. Its cost is being depreciated with the straight-line method using the following facts and estimates.

d. Two items of equipment (a sprayer and an injector) were purchased and put into service in early January 2016. They are being depreciated with the straight-line method using these facts and estimates.

e. On August 1, 2018, the company is paid $3,840 cash in advance to provide monthly service for an apartment complex for one year. The company began providing the services in August. When the cash was received, the full amount was credited to the Extermination Services Revenue account.

f. The company offers a warranty for the services it sells. The expected cost of providing warranty service is 2.5% of the extermination services revenue of $67,760 for 2018. No warranty expense has been recorded for 2018. All costs of servicing warranties in 2018 were properly debited to the Estimated Warranty Liability account.

g. The $15,000 long-term note is an 8%, five-year, interest-bearing note with interest payable annually on December 31. The note was signed with First National Bank on December 31, 2018.

h. The ending inventory of merchandise is counted and determined to have a cost of $11,700. Bug-Off uses a perpetual inventory system.

Required:

1. Use the preceding information to determine amounts for the following items.

a. Correct (reconciled) ending balance of Cash, and the amount of the omitted check.

b. Adjustment needed to obtain the correct ending balance of the Allowance for Doubtful Accounts.

c. Depreciation expense for the truck used during year 2018.

d. Depreciation expense for the two items of equipment used during year 2018.

e. The adjusted 2018 ending balances of the Extermination Services Revenue and Unearned Services Revenue accounts.

f. The adjusted 2018 ending balances of the Warranty Expense and the Estimated Warranty Liability accounts.

g. The adjusted 2018 ending balances of the Interest Expense and the Interest Payable accounts.

2. Use the results of part 1 to complete the six-column table by first entering the appropriate adjustments for items a through g and then completing the Adjusted Trial Balance columns. (Hint: Item b requires two adjustments.)

3. Prepare journal entries to record the adjustments entered 4n the six-column table. Assume Bug-Off’s adjusted balance for Merchandise Inventory matches the year-end physical count.

4-a. Prepare a single-step income statement for year 2018.

4-b. Prepare a statement of retained earnings (cash dividends during 2018 were $10,000) for year 2018.

4-c. Prepare a classified balance sheet as at 2018.

Periodically, Merrill Lynch customers are asked to evaluate Merrill Lynch financial consultants and services (2000 Merrill Lynch Client Satisfaction Survey). Higher ratings on the client satisfaction survey indicate better service with 7 the maximum service rating. Independent samples of service ratings for two financial consultants are summarized here. Consultant A has 10 years of experience, whereas consultant B has 1 year of experience. Use = .05 and test to see whether the consultant with more experience has the higher population mean service rating. Consultant A Consultant B   = 16   = 10   = 6.82   = 6.25   = 0.7   = 0.8 State the null and alternative hypotheses. H0: 1 - 2 Ha: 1 - 2 Compute the value of the test statistic (to 2 decimals). What is the p-value? Use z-table. The p-value is What is your conclusion?

In 2000 Nokia wanted to enable knowledge management and learning alternatives across its whole value chain - Suppliers (Busines-2-Business B2B), Customers (Business-2-Customers B2C) and Employees (Business-2-Employees B2E). This perspective would allow Nokia to deliver understanding how to over 200 million people. Enabling suppliers, customers, and employees easy, collaborative and timely access to essential and valuable information about Nokia's products and services, would increase production, commercial awareness and improved dedication from its value string through upgraded services, products, tools and information. Knowledge Management System in Nokia is divided into 3 levels: Individual level, Group level and Organizational level. Knowledge Architecture in Nokia practices Nonaka's model. You can find four ways to capture Knowledge: tacit to tacit communication (socialization), tacit to explicit communication (externalization), explicit to tacit communication (internalization), explicit to explicit communication (combination).
One of the primary Knowledge Management enabler is Nokia Research Centre (NRC), which is implemented for exploring new frontiers for freedom, solving scientific issues to convert the converging Internet and marketing communications establishments. Another enabler, Customer Relationship Management (CRM), Nokia uses CRM to extend the usage of vital customer information to the mobile workforce, ensuring they have got the required resources, when and where they want them. Also Supply Chain Management (SCM) is a KM enabler, Nokia has integrated an operating model by using SCM to accomplish one with their central strategies, which is to add new-product speedily that reflect consumers' fast-changing mobile phone tastes to ensure an industry advantage which emphasize rapid-response processing, quick-ship logistics, and a "global resource web" that links back to you Nokia's crops and suppliers. There are many companies became Kilometers enablers for Nokia to achieve their Kilometers goals. They may be Liquid Air Laboratory GmbH, Psiloc, Kuneri Ltd. , Citrix Systems, Inc. , DiVitas Systems, Mobien Systems Private Limited, Oracle Corp., Sam Click Ltd., iGuanaMobile Sdn Bhd, SYSOPENDIGIA plc, Openbit Ltd. , Secure Digital Box AG.
In spite of the scientific possibilities and an increased volume of computer engineers and information systems professionals, Nokia continue steadily to face serious knowledge management problems, due to the insufficient interdisciplinary knowledge required for an integrated method of the complex information activities involved with every part of work and doing business. As Nokia runs globally, they cannot fully understand the information trends and the implications of the global information societies and information fads. To overcome this issue Nokia is spending abundant money on expensive technology and tools that are not exploited to the higher benefit of the organization. Nokia, regardless of the socioeconomic and politics systems in which they operate, need large numbers of information. That is especially true for those in transitional economies. Hence Nokia is suffering from inefficient and inadequate supervision and exploitation of these information resources.

1. What was Nokia’s strategy behind implementing a KM system? (20 points)

2. What are the main features of Nokia’s KM system? (20 points)

3. Explain the main enablers of KM system at Nokia. (30 points)

4. Explain the main challenges encountering Nokia’s KM systems. (30 points)

Archipelago World News, oldest newspaper in the Archipelago. Poll contacted 2000 randomly generated landline and cell phone numbers of Westopiaresidents during the past week and asked the question:

•Who are you planning on voting for?

Results: 1109 respondents support our candidate.

Conduct a significance test to determine if the poll predicts your candidate will win - that is, the majority of voters will select your candidate.

a) Write the Null and Alternative Hypotheses for this test

b) Check the assumptions necessary for this test to be valid.

c) What is the Test Statistic?

d) What is the P-value? and interpret the P-value

e) What is the 95% confidence interval for p? and interpret this interval

f) How confident are you that your candidate will win the election? and explain

- Very confident will win

- Very confident will lose

- Pretty confident will win

-Pretty confident will lose

g) Does the analysis of the poll predict your candidate will win?

h) Now it's three weeks later and the day of the election. A lot has happened since then, including a lot of negative media coverage on both candidates. Do you still think the conclusions made by you are valid? Explain