1. In 2004, Murthy, Krumholz, & Gross investigated disparities in access to clinical trials in an article entitled “Participation in cancer clinical trials: race-, sex-, and age-based disparities”.

Does the distribution of participants in clinical trials correspond to the population distribution, given that…

a.

b.

3. What would you conclude based on these findings?

17. You are interested in purchasing a new 2004 Corvette at Rainbow Chevrolet Pontiac. If you will have to make monthly payments of $1,000.00 for four years, and the loan rate equals 5.9%, what amount is being borrowed to finance the cost of the car? Place the appropriate values in the proper cells in row 11, given the columns as provided below. The remaining instructions are stated in Q1.

2. In 2004, a team of researchers published a study of contaminants in farmed salmon. Fish from many sources were analyzed for 14 organic contaminants. The study expressed concerns about the level of contaminants found. One of those was the insecticide mirex, which has been shown to be carcinogenic and is suspected to be toxic to the liver, kidneys, and endocrine system. Summaries for the mirex concentrations (in parts per million) in the farmed salmon are: n=150, X ̅=0.0913 ppm, s=0.0495 ppm. (1) What assumptions and conditions must be checked before finding a confidence interval? (2) Find a 95% confidence interval for the mean level of mirex concentrations. Show the formula, not just by Minitab. (3) Interpret this confidence interval. (4) Explain what 95% confidence means.

In 2004 the Pandora made a rights issue at $5 a share of one new share for every four shares held. Before the issue there were 100 million shares outstanding and the share price was $6. For questions (a) to (c) assume that all rights were exercised.

(a) What was the total amount of new money raised?

(b) What was the value of the right to buy one new share?

(c) What was the prospective stock price after the issue?

(d) How far could the stock price after the issue fall before shareholders would be unwilling to take up their rights?

(e) Suppose that the rights issue is at $4 rather than $5 per share. How many new shares would it have needed to sell to raise the same sum of money? How do your answers to (b) and (d) change? Are the shareholders any better or worse off with the $4 exercise price?

Read the following scenario and answer the question in 5–10 sentences.

In December of 2004, the company you own entered into a 20-year contract with a grain supplier for daily deliveries of grain to its hot dog bun manufacturing facility. The contract called for "10,000 pounds of grain" to be delivered to the facility at the price of $100,000 per day. Until February 2017, the supplier provided processed grain which could easily be used in your manufacturing process. However, no longer wanting to absorb the cost of having the grain processed, the supplier began delivering whole grain. The supplier is arguing that the contract does not specify the type of grain that would be supplied and that it has not breached the contract. Your company is arguing that the supplier has an onsite processing plant and processed grain was implicit to the terms of the contract. Over the remaining term of the contract, reshipping and having the grain processed would cost your company approximately $10,000,000, opposed to a cost of around $1,000,000 to the supplier. After speaking with in-house counsel, it was estimated that litigation would cost the company several million dollars and last for years. Weighing the costs of litigation, along with possible ambiguity in the contract, what are three options you could take to resolve the dispute? Which would be the best option for your business and why?

In December 2004 new soybean varieties were released for planting in the Spring of 2005. These varieties (IA2070 and IA2071) produce oil that can be labelled as low in saturated fat according to the Food and Drug Administration (FDA). As a farm owner, you are considering planting these new varieties. However, you would like to compare their yield with that of other soybean varieties that are usually planted. An experiment conducted in central Iowa in the Spring 2004 provided the following data. Plots were randomly assigned to soybean varieties. Yield is measured in bushels/acre at 13% moisture.

a) Test the null hypothesis that the mean yield is the same for all variables. Is the method you used a valid method?

b) Calculate the pooled standard deviation

c) Use a Tukey-Kramer method to compare all pairs of mean yields at alpha=0.05

d) Give a 95% confidence interval for the mean yield of variety IA2070

1. In a survey of U.S. adults with a sample size of 2004, 345 said Franklin Roosevelt was the best president since World War II. TwoTwo U.S. Two adults are selected at random from this sample without replacement. Complete parts​ (a) through​ (d).

​(a) Find the probability that both adults say Franklin Roosevelt was the best president since World War II.

​(b) Find the probability that neither adult says Franklin Roosevelt was the best president since World War II.

​(c) Find the probability that at least one of the two adults says Franklin Roosevelt was the best president since World War II.

2. The probability that a person in the United States has type B​+ blood is 12%. 4 unrelated people in the United States are selected at random. Complete parts​ (a) through​ (d).

(a) Find the probability that all five have type B​+ blood.

​(b) Find the probability that none of the five have type B​+ blood.

​(c) Find the probability that at least one of the five has type B​+ blood.

​3. A study found that 39% of the assisted reproductive technology​ (ART) cycles resulted in pregnancies. ​Twenty-five percent of the ART pregnancies resulted in multiple births.

​(a) Find the probability that a random selected ART cycle resulted in a pregnancy and produced a multiple birth.

​(b) Find the probability that a randomly selected ART cycle that resulted in a pregnancy did not produce a multiple birth.

​(c) Would it be unusual for a randomly selected ART cycle to result in a pregnancy and produce a multiple​ birth? Explain.

Forty employers in a variety of fields and cities were surveyed in 2004 on topics relating to company benefits, and the degree to which employees were supported in terms of flexible work hours and child care assistance. One question asked if the employer had any experience or knowledge about attention-deficit hyperactive disorder (ADHD). Responses of either yes (y) or no (n) are shown below.

(a) Set up a 95% confidence interval for the proportion of all employers who have experience or knowledge of ADHD. (Round your answers to two decimal places.)

The Big Red Company sold merchandise to a customer for 500,000 on January 1^st, 2004 with a cost of 100,000. A payment of 100,000 is due at date of sale and annual payments of 100,000 due each succeeding January. The expected collectibility is exceptionally uncertain. Use the installment method of accounting and the cost recovery method to journalize the necessary entries.

During the 2004 Olympic Games, a shot putter threw a shot put with a speed of 12.1 m/s at an angle of 43.7° above the horizontal. She released the shot put from a height of 2.07 m above the ground.

a) How far did the shot put travel in the horizontal direction?

b) How long was it until the shot put hit the ground?