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A sample of students is selected from a population with µ = 50. After a treatment is administered to the individuals in the sample, the mean is found to be M = 55 and the variance is s2 = 64.
If the sample has n = 16 scores, then conduct a hypothesis test to evaluate the significance of the treatment effect.
Use a two-tailed test with α = .05.
What is the est. standard error or est. s.e. value?
A random sample of n = 4 scores is chosen from the population with µ = 80 and σ = 20. On average, how much difference would you expect between sample mean and population mean?
Suppose that b is a random number from the interval (-3, 3). What is the probability that the quadratic equation x2 + bx + 1 = 0 has at least one real root?
Repeat part (a), but with an interaction term included. Interpreting the R2 value, to what extent has inclusion of the interaction term improved the model's explanatory power?
If the sample mean is 27, what is a 95% confidence interval for the population mean?
according to u.s. news amp world report data in 1995 tuition costs at indiana university a public university were 2984
Assuming the number of calories is normally distributed, construct a 99% CI for the population mean number of calories.
Find the reliability of the transistor after 4000 hours of operation. What is the mean time to failure? If the repair rate is 0.004/hour, find the availability.
You just saw an ad on television that states the majority of the population would vote to make smoking illegal.
In the city of Bedford, there are two taxicab companies. Blue and Green. As you may suppose. Blue cabs are blue and Green cabs are green.
An antihistamine is frequently studied using a model to examine its effectiveness (compared to a placebo) in inhibiting a positive skin reaction to a known allergen. Consider the following situation. Individuals are screened to find 20 subjects wh..
This is to be based on a single variate analysis of the data provided, and its focus is on the interpretation of the output of the various charts/tables/statistical tests you choose to utilise. Clearly you must provide a rationale for such an analysi..
A 90% confidence interval estimate for a population mean was computed to be (38.2, 59.4). Determine the mean of the sample, which was used to determine the interval estimate.
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