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Find examples in the research that utilize the independent and dependent t-tests that are used to answer a question. Find the t value and its associated p value.
A researcher has reason to believe that, for an experiment with 50 points, a 95% prediction interval would be of width 8. If the researcher wishes to run a more precise experiment that will result
Suppose we have a population of scores with a mean (µ) of 975 and a standard deviation (s) of 15. What percentage of the population will lie between 960 and 990?
Consider the following time series data.Week 1 2 3 4 5 6Value 18 13 16 11 17 14 Using the naive method (most recent value) as the forecast for the next week, compute the following measures of foreca
The number of students visiting their professor during office hours each day has a Poisson distribution with average of 5 students every two days. For a given day, find the probability that at leas
Explain the difference between qualitative, quantitative, discrete, and continuous variables.
Describe a situation in your business or personal life that required research. You also may describe a current situation that will require research in the future.
Your measurements are {12,9,13,12,14} all in mm. Find the mean, standard deviation, and standard error on the mean. Include units.
How large a sample should be so that we can assert with 95% confidence that the margin of error of the estimation is less than 3%?
What is teh probability that the height of a randomly selected female college basketball player is more than 66.5 inches?
A request-for-proposal (RFP) has been recently sent to three consulting firms. The research contract will be awarded to the firm that has the best proposal. Your manager has requested that you spear
Find the following probabilities for the standard normal random variable Z. We are suppose to use the Z table but I am confused on how it works, any suggestions?
Mary Smith is the Manager of Market Intelligence for Acme Automotive Accessories (AAA) Corporation, a $500 million manufacturing company traded on the NYSE.
A company is testing a machine that produces balls. A sample of 27 balls has (for the diameters) a sample mean of 3.5025 inches and sample standard deviation of 0.01 inches. Find a 99% confidence in
(a) State the relevant null and alternative hypotheses. (b) Calculate the appropriate test statistic. (By hand or using JMP.)
If the z-score of the standirez test statistic is z+.529, then is there significant difference between the defect rates at the 10% level of significance?
What is the probability of a customer being sold an underweight (less than 1kg) bag of sugar?
The hours of study and the final exam grades have this type of relationship: y = 5.76(hours) + 35.31. Based on this linear regression equation, estimate the expected grade for a student spending 8
There is one spark plug per cylinder, so four spark plugs have just been installed. For each spark plug, the probability that it is defective and will fail during its first 20 minutes of flight is
If two or more spark plugs fail, the plane will crash. What is the probability that this happens? You may use software to help determine this probability.
Using the empirical rule, 95% of female heights should be between what two values? Either show work or explain how your answer was calculated.
In a game, you pay $2 to play per game. it is possible to win $2, $4, or $8 with respective probabilities 75/216, 20/216, 1/216. What is the probability that you win nothing?
There are 4000 mangoes in a shipment. How many mangoes have weights between 14 ounces and 16 ounces?
A political party suspects there are differences in Presidential candidate preferences based on age. A nationwide survey was conducted with 500 registered voters selected at random in each of four a
What is the probability that they will BOTH go to the gym after work on the same day? What is the probability that ONE of them will go to the gym after work?