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"On a standardized test of English grammar the mean score is 100 with a standard deviation of 10. A teachertimes out is a new teaching method with class of 35 randomly selected students and finds their mean performance to be 103. Calculate the test statistic for testing the null hypothesis. The slass mean will be not be signfically different from the population mean. What is your decision about the null hypothesis?"
To test this notion, eight paid volunteers were placed (individually) in a room in which there was no light from the outside and no clocks or other indications of time.
Describe your answer to a person who has never had a course in statistics.
Find out equation of the line of best fit. Find out r - Is there a strong relationship?
A marketing research analyst collects data for a random sample of 100 customers out of the 400 who purchased a particular "coupon special".
Probability of selecting a graduating college who had given blood that percent of the time. What is the mean number of times a person gave blood based on this poll?
A state survey investigates either the proportion of 8percent for employees who commute by car to work is higher than it was five years ago.
Yielding a sample mean of 190.7 days and a sample standard deviation of 54.2 days. Estimate the true mean population of the growing season with 95% confidence.
A company wants to know if minorities are more likely to be in certain job categories than others. Their data base codes employees 1 for clerical, 2 for custodial, and 3 for manager. A logistic equation was fit to the data with SPSS.
Mothers did not take the drug DES during pregnancy , what is the estimate of the number of women out of 1000 who would be expected to have tissue abnormalities?
Find the probability that it has a defective bulb or defective battery, a good bulb or good battery,a good bulb and good battery.
a) How is it possible that the minimum of the 365 values is 0 inches and the median is also 0 inches? b) Describe the distribution as symmetric, left-skewed or right-skewed.
What is the probability that 25% or fewer male employees will indicate that they have to pick up the slack for moms working flextime?
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