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Gathering data using a variety of techniques like sampling, experiment, simulation or census. What technique for gathering data (sampling, experiment, simulation or census) do you think was used in each of the following studies?
1. A computer program was used to model global weather patterns and to produce long-range weather forecasts for a rural agricultural region.
2. A random sample of 1,000 residents of a main metropolitan area was surveyed to determine the level of support for a new sports complex between all residents of area.
3. To conclude the effect of a new fertilizer on productivity of tomato plants one group of plants is treated with the new fertilizer as a second group is grown without such treatment. The number of ripe tomatoes produced by each group is counted.
4. A study was done regarding the number of home runs scored by major league baseball teams playing at altitudes over 5,000 feet. Data for all main league baseball games played at his altitude was used in the study.
Compute the correlation among the variables. Describe perfect correlation also negative correlation. Utilize the following data to answer questions related.
The hypothesis is to be tested at the 5% level of significance. The critical value from the table equals:
Create a 99% confidence interval for mean overall duration of symptoms in population of individuals who used zinc lozenges.
As we can say there is 5.5 percent chance of seeing the current policy having an effect on smog in the results we observed from natural sampling variation.
Woodco manufactures tables and chairs. Each table and chair must be made entirely out of oak or entirely out of pine. A total of 150 board feet of oak and 210 board feet of pine are available.
Discuss possible study designs. Which of the designs would we use to test our research hypothesis?
Determine the probability that no more than 10 firms are perfectly competitive?
Rhode Island Red Chickens the incubation time for Rhode Island Red chicks is normally distributed to find out the number of chicks we expect that will hatch.
A game involving a pair of dice pays you 3 with probability 17/36, costs you 2 with probability 14/36, and costs you 4 with probability 5/36. What is your probability of losing money in one play of the game?
At the .05 level of significance, can we conclude that those joining Weight Reducers on average will lose less than 10 pounds? Determine the p -value.
Find out the value of correlation coefficient. Make a regression model to predict winning percentage utilizing all of the data.
The average number of hours of sleep per night that a college freshman gets is 6.50 with a standard deviation of 1.80 hours. If 35 college freshmen are randomly chosen find the probability that they average at least seven hours of sleep per night.
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