A study was conducted among children aged 8-10 to determine if resting heart rate differed between males and females. Independent samples of 8 females and 8 males were selected from the two respective populations.

The results were as follows (heart rates in beats/min):

Females 71, 80, 80, 75, 78, 77, 81, 82

Males 71, 81, 79, 74, 73, 78, 71, 74

Assume the samples were drawn from normally distributed populations with equal variance.

a) Use α = 0.05 (two-tailed) and assume 80% power.

b) State the null and alternative hypotheses.

c) List the critical value

d) Perform the appropriate statistical test using the attached SAS file.

e) If the decision was to fail to reject Ho, can Ho be accepted?

All work needs to be shown

Consider all observations as one sample of X (1st column) and Y (2nd column) values. Answer the following questions: (20 points)

a) Calculate the correlation coefficient r

b) Fit the regression model (predicting Y from X) and report the estimated intercept and slope.

c) Test whether the slope equals 0. Report your hypothesis, test statistic, p-value.  

All work needs to be shown

10. Ms. McNicholas wants to see if there is any difference in the Final Exam scores of her two Statistics classes. Class I 81 73 86 90 75 80 75 80 75 81 85 87 83 75 70 65 80 76 64 74 86 80 83 67 82 78 76 83 71 90 77 81 82 Class II 87 77 66 75 78 82 82 71 79 91 97 89 92 75 89 75 95 84 75 82 74 77 87 69 96 65 a) Find the five-number summary for each class. b) Construct a boxplot for each class. c) Determine the range for outliers on each graph. d) Is there a difference in the performance of the two classes?

Here is a simple probability model for multiple-choice tests. Suppose that each student has probability p of correctly answering a question chosen at random from a universe of possible questions. (A strong student has a higher p than a weak student.) The correctness of answers to different questions are independent. Jodi is a good student for whom p = 0.8.

(a) Use the Normal approximation to find the probability that Jodi scores 74% or lower on a 100-question test. (Round your answer to four decimal places.)

(b) If the test contains 250 questions, what is the probability that Jodi will score 74% or lower? (Use the normal approximation. Round your answer to four decimal places.)

(c) How many questions must the test contain in order to reduce the standard deviation of Jodi's proportion of correct answers to half its value for a 100-item test?

Greg’s Bicycle Shop has the following transactions related to its top-selling Mongoose mountain bike for the month of March. Greg's Bicycle Shop uses a periodic inventory system.

For the specific identification method, the March 5 sale consists of bikes from beginning inventory, the March 17 sale consists of bikes from the March 9 purchase, and the March 27 sale consists of four bikes from beginning inventory and eight bikes from the March 22 purchase.

rev: 02_28_2017_QC_CS-80932, 04_13_2020_QC_CS-208026

Problem 6-2A Part 1

Required:

1. Calculate ending inventory and cost of goods sold at March 31, using the specific identification method.

2. Using FIFO, calculate ending inventory and cost of goods sold at March 31.

3. Using LIFO, calculate ending inventory and cost of goods sold at March 31.

4. Using weighted-average cost, calculate ending inventory and cost of goods sold at March 31. (Round your intermediate and final answers to 2 decimal places.)

5. Calculate sales revenue and gross profit under each of the four methods. (Round weighted-average cost amounts to 2 decimal places.)

6. Comparing FIFO and LIFO, which one provides the more meaningful measure of ending inventory?

7. If Greg’s Bicycle Shop chooses to report inventory using LIFO instead of FIFO, record the LIFO adjustment. (If no entry is required for a transaction/event, select "No Journal Entry Required" in the first account field.)

In 2000, the percentage of adults in a certain town who drove an SUV was 53%. In 2005, in a random sample of 100 people from this town, 45 said that they drive an SUV. At the 10% level of significance, use the critical-value method to determine if the percentage of adults in this town who drive an SUV has changed from the 2000 percentage. Correctly state a) your conclusion about what to do with H0 AND b) your conclusion about the claim that is being made.

TOPIC: Cation exchange capacity (CEC) determination in soil

 First of all, search and understand the meaning and the importance of the parameter in agriculture.

 Explain the analysis methods with details. If there are more than one methods, you must mention about the other methods as well.

 Find the limits and their meanings including the reference you used (Ex: 0-5 Low, 5-10 Medium, 10-15 High etc. (FAO, 2005)

 Do not forget to include your references.!

Housing supply and demand is an example of the effects supply and demand can have on price elasticity. The most recent housing boom from 2000-2005 was not only a boom in housing prices, but also in-house construction.

Based on your readings, there are a number of factors that determine housing prices. Some are based on economic theories and some are based on more intangible factors. Describe the key economic factors which effect housing prices and how they are determined (Home Guru).

Fill in the blanks in the following table. At which level of output do we obtain maximum profit? What is the relationship between marginal revenue and marginal cost at the profit-maximizing level of output?

Suppose that you need to buy a refrigerator for your office. You recognize that there are two alternative models in the market that might meet your needs. If you buy model A, you have to pay AZN 1000 but with this model you will decrease your electricity bills by AZN 50 per year for the next 5 years. If you prefer model B, you have to pay AZN 800 but you don’t see any decrease in your electricity bills. If the interest rate is 5%, which model will you buy?

Explain the effect of minimum wage policy on labor market. What are the arguments for supporters and opponents of minimum wage policy?

Suppose the price elasticity of demand for Azercell cards is -2. If Azercell managers want to increase their profits, how should they change the price of Azercell cards? Explain in detail.

Suppose the income elasticity of demand for AZAL flight tickets is 1.75. If the average income level decreases by 6%, what would be the effect of this recession on the demand for AZAL flight tickets? Explain in detail.

Through the use of online tools and search facilities, ordinary users can acquire personal information about others. As a matter of fact, anyone with internet access can use search engines such as Google to find out information about another individual. Sometimes, the person who is the subject of research is completely unaware that the information is publicly available. Does this use of search engines pose a threat to the privacy of ordinary people? Explain your answer.