Reference no: EM131319755
Researchers investigated the issue of race and equality of access to clinical trials. The table below shows the population distribution and the numbers of participants in clinical trials involving lung cancer.
|
Race / ethnicity
|
White non-Hispanic
|
Hispanic
|
Black
|
Asian/Pacific Islander
|
American Indian/Alaskan Native
|
|
Distribution of Population
|
75.6%
|
9.1%
|
10.8%
|
3.8%
|
0.7%
|
|
Number in Lung Cancer Clinical Trials
|
3855
|
60
|
316
|
54
|
12
|
1. What is the value for n, the total number of observed sample values?
2. How many degrees of freedom do we have in this hypothesis test?
3. What is the observed frequency O for the White/non-Hispanic category?
4. What is the expected frequency E for the White/non-Hispanic category? Round your answer to the nearest whole number?
5. What are the null and alternative hypotheses for this goodness-of-fit test?
6. What is the test statistic for this goodness-of-fit test? Round your answer to three decimal places.
7. What is the critical number for this hypothesis test if the significance level is 0.01?
8. If we use the significance level 0.01 do we reject or fail to reject the null hypothesis?
9. If we use the 0.01 significance level, state your conclusion for the hypothesis test. Is there a race/ethnic group that appears to be very underrepresented? Explain.
|
Connie wants to have an annuity payment
: Connie wants to have an annuity payment of $2,000 at the END of every three months. How much should she deposit now at 6% interest, compounded quarterly, to yield this payment for 3 years? (Use Table 12-2 in your text)
|
|
Describe your overall reaction after attending the event
: Clearly identify the event location, date attended, the attendees, and your initial reaction upon arriving at the event. Provide specific information and a description of at least two (2) pieces. Provide a summary of the event and describe your overa..
|
|
Select one of four primary categories of terrorist hazards
: Select one of the four primary categories of terrorist hazards (Chemical, Biological, Radiological/Nuclear, Explosives). Provide a history of its use as a weapon of mass destruction (WMD); describe how it is made and dispersed, signs and symptoms ..
|
|
Using only the single-payment present-worth factor
: A series of payments-$10,000 first year $9,000 second year; $8,000 third year; $7,000, fourth year; and $6,000, fifth year-is equivalent to what present amount at 10% interest compounded annually? Solve this problem using the gradient factor, and the..
|
|
Total number of observed sample values
: 1. What is the value for n, the total number of observed sample values? 2. How many degrees of freedom do we have in this hypothesis test? 3. What is the observed frequency O for the White/non-Hispanic category?
|
|
After-tax rate of return
: Jonah has the choice of paying Rita $24,000 today or $96,000 in 10 years. Assume Jonah can earn a 12 percent after-tax rate of return. Which should he choose? Assume Rafael can earn an 8 percent after-tax rate of return. Would he prefer $2,700 today ..
|
|
Sketch the radiation pattern in the cross-sectional plane
: A Hertzian dipole is situated parallel to a corner reflector, which is an arrangement of two plane, perfect conductors at right angles to each other, as shown by the crosssectional view in Figure 9.1
|
|
Serving time for drug dealing
: According to Harper's Index, 55% of all federal inmates are serving time for drug dealing. A random sample of 15 federal inmates is selected. (a) What is the probability that 9 or more are serving time for drug dealing? (Use 3 decimal places.)
|
|
Create a query that will select records for customers
: Create a query that will select customers who had less than 10 pounds of produce picked for Grapes, Watermelons, or Strawberries. The query should include the Service Date, Customer Number, Business Name, Street, City, State, Zip, and the Weight ..
|