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A market research company surveyed consumers to determine their ranked preferences of energy drinks among the brands Monster, Red Bull, and Rockstar.
a. what are the outcomes of this experiment for one respondent?
b. what is the probability that one respondent will rand Red Bull first?
c. What is the probability that two respondents will both rank Red first?
A arbitrary sample of 8 students is selected. Illucidate the probability that among the students in the sample at least 7 are female.
He randomly samples 45 oil wells throughout the United States and determines the mean output to be 10.7 barrels per day with a standard deviation of 1.3 barrels. Test the researcher's claim at the .025 level of significance.
Find out a 95% confidence interval for the proportion p of adults who have a great deal of trust and confidence in the executive branch of government.
A newspaper reports have 58 percent of farmers are planning to plant genetically modified crops presesnt year. The article adds that the poll is based on a random sample.
Using Non-parametric test, whether there is significant difference in the motor coordination skills.
Recognize and describe potential threats (up to 3) to internal validity.
If many samples of size 1000 persons are chosen, determine the expected value (mean X-bar) or average of average IQ's for these samples?
Conduct a marketing experiment in which students are to taste one of two different brands of soft drink
If we wanted to shorten the interval of the estimation of the true mean of Saturday sales to a width of $600 in total, what should the size of our sample be to achieve it?
Suppose these data represent whole population. Determine the population mean and population standard deviation.
To test whether or not there is a difference between treatments A, B, and C, a sample of 12 observations has been randomly assigned to the 3 treatments. You are given the results below.
Test out an suitable hypothesis also state your conclusion. Make sure the suitable assumption as well as conditions are satisfied before you proceed.
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