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The Atlanta Convention & Visitors Bureau just released a report on the percentage of available hotel rooms in Fulton County that were rented (occupied) in 2003. Looking over the report you note that room occupancy in March of 2003 was 77.6% (total rooms available is 14,800) and in December of 2003 it was 55.5% (of the 14,600 available rooms). Being of an inquisitive mind and wishing to impress your current statistics instructor, you determine to figure if there is a significant difference in the two occupancy rates - that is, must something other than statistical error and normal chance be impacting the number of people staying at local hotels in March over that in December.
Then you show this information to a friend of yours who does market research for an advertising agency. He responds that it is impossible to know without knowing means and standard deviations. But, you still wonder if there is a way.
1. Can it be done? Yes ______ No ______
2. If yes, how would you do it? What statistical method would you use? Name the statistical method (equation) and explain why. Then, set up the Ho and H1.
The volume of the gas is measured 201 mL at .989 atm. compute the number of grams of Na used in the reaction if Vapor pressure of water = 0.0277 atm
The following data resulted from an experiment to study the effects of leaf removal on the ability of fruit of a certain type to mature:
Compute the pH of a solution made by mixing eighty grams of NaCH3COO, to 39 grams of CH3COOH, and adding in H2O to produce 500. mL of solution.
You place ethanol of 100 grams and water of 100 grams in a refrigerator. both are at room temperature Initially,. Determine which of the two liquid samples will cool faster and also explain why this happens.
A professional basketball player ins averaging 21 points per game. he will be retiring at the end of this season. The team has multiple options to replace him.
The precipitate of CaC2O4, weighed 1.437 grams determine the molarity of calcium chloride in the solution?
Mixture also contains He (helium gas). determine the partial pressure of the He gas?
mixture(O,H) is ignited with a spark and it reacts to form (H2O)liquid water. determine the temperature of water.
Carry out an overall test to determine if there is significant evidence of a difference among A; B and C, at the significance level 1%.
Determine the percent yield for this reaction as N2(g) + 3 H2(g) ? 2 NH3(g)
AVX Stereo Equipment, Inc recently began a "no hassles" return policy. A sample of 500 customers who had recently returned items showed 400 thought the policy was fair, 32 thought it took too long to complete the transaction, and the rest had no o..
For patients over age 80, probability is 0.05 that coronary bypass patient will die soon after surgery, if hospital performs eight such operations, determine the probability of two or more fatalities?
After careful analysis, East West has determined the following cost breakdown for the four manufacturers (in $1,000's) based on whether or not the trade bill passes:
State the hypotheses for a right-tailed test. Obtain a test statistic and p-value assuming unequal variances. Why might the sample data not follow a normal, bell-shaped curve? If not, how might this affect your conclusions?
Assuming an exponential service rate μ, set this up as a birth and death process and determine the birth and death rates.
If W denotes the total number of spaces one moves under these special conditions, find the mean and standard deviation of W.
Assume that sigma = 60, choose an alpha level, and perform a hypothesis test to determine whether this is good evidence to conclude that the mean score for all young men is less than 275.
There are three flight phases. At α = 0.05, is the cockpit noise level independent of flight phase?
Calculate p value? What is the critical value?
The personnel manager at a company wants to investigate job satisfaction among the female employees. One evening after a meeting, she talks to all 30 female employees who attended the meeting.
The proportion of drivers who use seat belts depends on things like age, gender, ethnicity, and local law. As part of a broader study, investigators observed a random sample of 117 female Hispanic drivers in Boston; 68 of these drivers were wearin..
Suppose there are two samples of size 6 and 7, with a rank sum of 58 in the sample of size 6. Using the Wilcoxon rank-sum test, evaluate the significance of the results, assuming there are no ties.
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