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Correlation Coefficient-Hypothesis test of correlation coefficient for Home Video Units sold and Box office gross-use 6 step process.
An exit poll of 1000 randomly selected voters found that 535 favored the incumbent candidate. Based on our poll what is the margin of error of the proportion of voters favoring the incumbent?
A random sample of 25 injections resulted in a variance of 0.135 . test if the apparatus has a greater variance than the desired one.
A random sample of size 70 is drawn from this population. What is the probability that the mean annual salary is between $32,000 and $32,500?
Describe a circumstance when the mean is very useful as the average and a circumstance when the mean is very misleading as the average.
Plane is 147.14 pounds, that the men on that plane weigh on the average 170 pounds, and women 130 pounds. How many men and how many women were on the plane?
The gymnasium is normal distributed with mean 80minutes and standard deviation 20 minutes .what is the patrons who spend more than 120 minutes at the gymnasium.
In the same graph, Illustrate the consumer's opportunity set when the price of good X increases to $20. How does this change alter the market rate of substitution between goods X and Y?
Assume the first patient is assigned treatment A, and whenever there is a tie in marginal discrepancy, the next patient is assigned treatment A. Use w0 = 2 and w1 = 1. Show all you work.
what is the probability that a cup contains 190 and 215 mls? how many cups will likely overflow if 230ml cups are used for the next 2000 cups? please help me answer this.
You could use to try to interpret what this outcome of r(2398) = -.21 tells us about the relationship between length of time taking drug X and the size of the tumor? Support your responses.
State a research question for which a single-group post-test only design can yield relatively unambiguous findings.
A unit has three modes, i.e. good (State 1), degraded (State 2) and failed (State 3). Find the probability that the unit fails during the first 10 hr of operation.
The MTTF for each unit is 1000 hours and MTTR is 10 hours. Find: a) the MTBF for the system and, b) compare it to MTTF for the system when there is no repair.
Write down the differential equations which describe the probabilistic behavior of the unit in time as a Markov process.
Based on the correlation coefficients (r-values) that were computed and their statistical significance, what conclusions do you draw regarding
what is wrong with letting "p" denote the probability of getting a correct answer while "x" counts the number of wrong answers?
Find the 95% confidence interval for the population mean based on the 37 patients who remain after you drop the outlier.
Consider the following maximization problem: Use graphical method. What is the optimal value of z?
The researcher in exercise 2 decides to conduct the same study using a within. What statistical test should be used to analyze these data?
The national exercise rate is 20%. The researcher gathers a random sample of 120 individuals who live in California and finds that the number who exercise regularly is 31 out of 120. What conclusion
Determine an interval for the batteries' lives that will be true for at least 80% of the batteries. (Hint: First compute the Z-score.)
(0.95 is 95th percentile for t) If the task time is independent and is distributed as follows: T1~ Normal (0.75, 0.2). What is the probability of exceeding t0.95= 2.9 hours
Normally distributed based on a sample of 20 observations having a sample mean of 8 and a sample standard deviation of 2. What is the standard error?
M and unknown standard deviation S, and let m and s denote the MLEs of M and S. for the sample size n=17, find a value of k such that P(m > M +ks) = 0.95.