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A testing organization is evaluating the effectiveness of sinus relief tablets, Relief and SineOut. As part of the analysis the organization collects 44 sinus sufferers and randomly assigns them to one of two groups. The first group gets Relief and the other gets SineOut. The length of time to get relief is measured. The mean time to get relief for the Relief group was 31 .0 minutes (s.d = 5.1) and for the SineOut group was 34.3 minutes (s.d. = 5.9). Test the hypothesis that the two medications differ in the time to take effect at the 5% significance level. You may assume that the time to take effect in each population is relatively normal.
A. State the null and alternate hypotheses.
B. State the test statistic.
C. State the decision rule.
D. Show the appropriate calculations and state the statistical decision.
E. What conclusions can you draw concerning the effectiveness of the medications?
In the game of roulette, a player can place a $8 bet on the number 33 and have a 1/38 probability of winning. If the metal ball lands on 33, the player gets to keep the $8 paid to play the game and the player is awarded an additional $280.
Describe the circumstances under which you should use ANOVA instead of t tests, and explain why t tests are inappropriate in these circumstances. Find a peer-reviewed article that reflects these circumstances, describe the research conducted (i.e...
A telemarketing firm in a certain city uses a device that dials residential telephone numbers in that city at random. Of the first 100 numbers dialed, 51% are unlisted. This is not surprising because 48% of all residential phone numbers in this ci..
Do you believe this model is useful in predicting the starting salary? Justify your answer, using information provided in the computer output.
In an enterprise the unit cost of the product is 200 dollars in 2000, 160 dollars in 2005, please calculate the average annual decline rate of unit cost during the period from 2000 to 2005. If in 2010 the unit cost of the product down to 112 dolla..
After researching cysts of a particular type, a doctor learns that out of 10,000 such cysts examined, 1,500 are malignant and 8,500 are benign. A diagnostic test is available which is accurate 80% of the time (whether the cyst is malignant or not)..
If a citizen who voted in the last election is randomly selected, what is the probability that they are a Democrat?
Test the hypothesis that random variable 30.4 31.2 30.8 29.9 30.4 30.7 29.9 30.1 come from a normal distribution with mean 30.5. The standard deviation of the measurements is known to be 0.1
A famous hypnotist performs to a crowd of 350 students and 180 non-students. The hypnotist knows from previous experience that one half of the students and two third on the non-students are hypnotizable.
Consider the following data for a simultaneous move ggiven: If you advertise and your rival advertises, you will each earn 5 million dollar in profits.
Ken and Gerard are roommates for a weekend and have succeeded in making their living quarters cluttered in very little time.
A worker faces a review every year. He prefers to spend time making if he will be reviewed; otherwise he would prefer to use time somewhere else.
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