In the following problems , give a complete hypothesis test for each problem. Use the method described. Make sure you include the original claim in symbols, The null and alternative hypothesis, the significance level, the actual formula and calculation of the test statistic, give the p-value and a drawing of critical region ,the decision concerning the null hypothesis and a conclusion stated in non technical terms
2. In a previous test baseballs were dropped 24 ft. onto a concrete surface, and they bounced an average of 984 in. In a test of a sample of 40 new balls, the bounce heights had a mean of 92.67 in. with a standard deviation of 1.79 in. Use a 0.05 significance level to determine whether there is significant evidence to support the claim that the new balls have bounce heights with a mean different from 92.84.
3. A communications industry spokesperson claims that over 80% of Americans either own a smart phone or have a family member that does. In a random survey of 1036 Americans, 956 said that they or a family member owns a smart phone. Test the spokesperson’s claim at the level.
4. A large university says the mean number of classroom hours per week for full-time faculty is more than 9. A random sample of the number of classrooms hours for full-time faculty for one week is listed. At test the university’s claim. Assume normality
10.7 9.8 11.6 9.7 7.6 11.3 14.1 8.1 11.5 8.5 6.9
5. USA Today ran a report about a University of North Carolina poll of 1248 adults from the southern United States. The poll asked them if they believed that Elvis was alive. 99 of the 1248 adults believed that Elvis still lives. The article began with the claim that almost 1 out of 10 Southerners still think Elvis is alive. At the 0.01 significance level, test the claim that the true percentage is less than 10%.
6. The FDA regulates that fish that is consumed is allowed to contain 1.0 mg/kg of mercury. In Florida, bass fish were collected in 53 different lakes to measure the amount of mercury in the fish. The data for the average amount of mercury in each lake is in table below Do the data provide enough evidence to show that the fish in Florida lakes has more mercury than the allowable amount? Test at the 10% level.
|
1.23 |
1.33 |
1.04 |
0.44 |
1.20 |
0.27 |
||||
|
0.48 |
0.19 |
0.83 |
0.81 |
0.71 |
1.5 |
||||
|
0.49 |
1.16 |
0.05 |
1.15 |
0.19 |
0.77 |
||||
|
1.08 |
0.98 |
0.63 |
0.56 |
0.41 |
0.73 |
||||
|
0.34 |
0.59 |
1.34 |
0.84 |
0.50 |
1.34 |
||||
|
1.28 |
0.34 |
0.87 |
0.56 |
0.17 |
0.18 |
||||
|
0.19 |
1.04 |
1.49 |
1.10 |
1.16 |
1.10 |
||||
|
0.48 |
0.21 |
0.86 |
0.52 |
0.65 |
0.27 |
||||
|
0.94 |
1.40 |
0.43 |
0.25 |
1.27 |
|||||
|
1.36 |
1.42 |
5.93 |
5.36 |
0.06 |
9.11 |
7.32 |
|||
|
7.93 |
6.72 |
0.78 |
1.80 |
0.20 |
2.27 |
0.28 |
|||
|
5.86 |
3.46 |
1.46 |
0.14 |
2.62 |
0.79 |
7.48 |
|||
|
0.86 |
7.84 |
2.87 |
2.45 |
||||||
In: Statistics and Probability
Determine earnings before interest and taxes, net income, and also the cash flow from operations for the following firm: $500,000 sales, $10,000 cash dividends, $300,000 cost of goods sold, $20,000 administrative expense, $20,000 depreciation expense, $40,000 interest expense, $10,000 purchase of productive equipment, no changes in working capital, and a tax rate of 35%.
In: Finance
You will have a tuition payment this time next year, payable in US dollars. Will you take any action, to cover changes in exchange rates? If so, what would you do, and why? For US students, assume you will spend a semester abroad, in the Euro zone, and will need to pay tuition in the local currency, so you have the same challenge.
In: Finance
An investor is an avid bond purchase. He requires a 5% return on
his bond purchases, yet, the bonds today currently yield 4% as a AA
rated bond. How can he achieve a 5% return on his bond purchases in
the future?
Please explain also how he can reduce changes in bond prices that
are part of his portfolio
In: Finance
Please explain if the following statements are true, false or both:
a) Increased investments decrease national savings.
b) Monetary neutrality is: "When money supply changes, relative price doesn't change either"
c) In monopoly, marginal revenue is always lower than the price.
d) Deadweight loss due to taxation is greater when supply and demand elasticity is greater
In: Economics
1. You purchased an IBM bond with a face value of $10,000 and an
interest rate of 10%. Suddenly, the market interest rate changes,
which raises your bond price by $600.
What was the original price of the bond? (Compute this answer to
two decimal places.)_____?
2.What is the new market interest rate? (Compute this answer to two decimal places.)______?
In: Economics
You are relaxing in a hot tub for 15 minutes until your peripheral blood vessels are very vasodilated. As you stand up to leave the hot tub, your blood pressure rapidly changes from 120/70 to 90/60. As compensatory mechanisms begin to be activated, discuss the cellular chain of events that will occur in your vascular smooth muscle cells.
In: Nursing
Experiment: Lewis Dot Structures, Hybridization, and Shapes of Molecules and Ions
| Ion or Compound |
Number of Valence e^- in Structure |
Lewis Dot Structure | Number of e^- around Central Atom | Resonance Structure (If any, show changes) | Hybridization | Electronic Geometry | Molecular Geometry | Is the Compound Polar? |
| H2CO3 | ||||||||
|
S2O2^2- thiosulfate ion |
||||||||
| SF4 | ||||||||
| AlCl3 | ||||||||
| XeF4 | ||||||||
| H3PO3 |
In: Chemistry
Identify the major components of stockholders’ equity by examining the Statement of Stockholders’ Equity. What types of transactions resulted in significant changes in the Stockholder Equity accounts during the most recent year? Did your company make dividend payments to stockholders during the most recent year?
For the Company UPS. Using information from UPS website/yahoo finance
In: Accounting
indicators pointing towards the reporting entity's as the functional currency include that which of the following?
1) production costs and operating expenses are determined primarily by local conditions
2) sales are mostly in the county of the reporting entity
3) there are active local markets, although there may be significant amounts of exports
4) prices are not primarily responsive in the short term to exchange rate changes
In: Accounting