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A local business school claims that its graduating seniors get higher-paying jobs than the national average for business school graduates. Last year's figures for salaries paid to all business school graduates on their first job showed a mean of $10.20 per hour. A random sample of 10 graduates from last year's class of the local business school showed the following hourly salaries for their first job: $9.40, $10.30, $11.20, $10.80, $10.40, $9.70, $9.80, $10.60, $10.70, $10.90. You are skeptical of the business school claim and decide to evaluate the salary of the business school graduates, using ?= 0.05 (2-tail) what do you conclude?
A random samle of 12 college freshmen is obtained. The probability that exactly two of the 12 freshmen will not return for their sophmore year is?
a statistics class consists of 24 students all but one of whom are unemployed or are employed in low paying part time
In each case, explain whether a control group was used and whether a placebo treatment was used.- Explain whether each of the following experiments was single-blind, double-blind, or neither.
the national average sat score for verbal and math is 1028. if we assume a normal distribution with o92 what is the
the probability that a randomly selected pregnancy lasts less than 149 days is approximately .3821.the probability that
What is the probability that the sum of the dice is 13?
random variable n has a poisson? distribution and y n n has a binomial n 12 distribution. find the moment generating
The following confidence interval is obtained for a population proportion, p:(0.458, 0.490). Use these confidence interval limits to find the point estimate, p-hat.
Is it harder to get into graduate programs in psychology or history? We randomly selected five institutions from among all U.S. institutions with graduate programs.
Reconsider Prob. 20.5-3. Ralph Billett realizes that the last-value method is considered to be the naive forecasting method, so he wonders whether he should be using another method.
Assume the variable is normally distributed. If an individual is selected, find the probability that the individual's pressure will be between 120 and 121.8 mmHg.
No estimate of the population proportion is available. How large a sample is required?
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