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A group of students at a school take a history test. The distribution is normal with a mean of 25 and a standard deviation of 4. The top 5% of the scores get to compete in a statewide history contest. What is the least score someone can get and still go on to compete with the rest of the state?
the ages of 32 people who signed up for a one year membership at gym last month are shown in the table below.
the probability of obtaining a head when a certain coin is flipped is about 0.65. what is the probability that heads
Find out the sample mean. Suppose that the desirable value for this solution was specified to be 7.20. Do you think that the sample mean value computed here is close enough to the target value to accept the solution as conforming to target? describe ..
How many gears should be produced in each run at what minimum cost and what is the cycle time?
a total of 797 nobel prizes had been awarded by 2007. 15 of the 101 prizes in literature were awarded to scandinavians.
the article high levels of mercury are found in californians describes a study in which hair samples were tested for
Formulate and test an appropriate set of hypotheses to determine if the machine can be qualified. Use a = 0.05. Find the P-value.
What is the probability Linda Lahey, company president, received exactly 1 email between 4 P.M. and 5 P.M. yesterday? What is the probability she received 5 or more email during the same period?
Using Chi-square table finding the P-value and interpret the result
For each set of data, calculate mean, median, mode, range, interquartile range, standard deviation, and coefficient of variation.
At the .05 significance level, can she conclude that there is a difference in the mean amount of weight loss among the three diets?
Using a random sample of 100 workers, researchers calculate a 95% confidence interval for the average hourly wage earned by construction workers in the city of Boston. This interval they calculate is from $18 to $26.
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