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Your statistics instructor claims that 60 percent of the students who take her Elementary Statistics class go through life feeling more enriched. For some reason that she can't quite figure out, most people don't believe her. You decide to check this out on your own. You randomly survey 64 of her past Elementary Statistics students and find that 34 feel more enriched as a result of her class.
Construct a 95% confidence interval for the true mean or proportion. Round to the nearest hundredth (2 decimal places).
Find the point estimate of the proportion of college students who smoke. In constructing 95% confidence interval for the proportion of college students.
Consider a charity organizations that receives random donations. Assume the donations to arrive following a Poisson process with a rate of one donation per hour in average. What is the probability that it will not be able to make the payment?
q1 use the normal approximation to the binomial to find the probability of x 20 when n 30 and p 0.5.q2 of
assume that adults have iq scores that are normally distributed with a mean of 100 and a standard deviation of 15. find
Identify the sampling techniques used, and discuss potential sources of bias(if any). Explain.Using random digit dialing, researchers call 1400 people and ask what obstacles keep them from voting.
Without looking, how many names would you need to pull out of the hat to be sure you get two girls? How many names would you need to pull out of the hat to be sure you get either two boys or two girls
If, 20 patients improved, 7 declined, and 3 remained the same, assess whether or not patients undergoing this treatment are showing significant change from baseline to 3 months afterward. Report a p-value.
The difference in the percentage of participants who quit (20% versus 46%) was statistically significant.
Find out the probbility that exactly five arrive within two days?
a garage door opener has six toggle switches each with three settings up center and down.a in how many ways can the
question 1 the following data are results from a study you recently completed. calculate the correlation coefficient
What extremely important characteristic of the data set is not considered in the hypothesis test?
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