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Question: Independent random samples taken on two university campuses revealed the following information concerning the average amount spent on textbooks during the past semester: At university "A" a sample of 50 students showed a sample mean of USD 260 and a sample standard deviation of USD 20, at university "B" a sample of 40 students showed a sample mean of USD 250 and a sample standard deviation of USD 23. At a 5 percent level of significance, test to see if there is a significant difference in the average amount spent at the two schools. Write your conclusion?
Find the z value to the right of the means so that 53.98% of the area under the curve lies to the left.
Effectiveness of a disease management program
Calculate the probability assuming a fair die is thrown twelve times.
Probability based on normal distribution.
Confidence interval for the mean test score.
Write the given number in standard notation and write the number in standard notation. 8 × 10 6
Define the variables, determine the slope and vertical intercept, and write an equation to model this data and evaluate the table of values of earning using the given data.
Find the unit price and profit functions.
Make a ninety percent confidence interval for the proportion.
Assume Jim had executed 15 "Splits" before his last split of 20 seconds. If his eventual time in the road race is 4:05 , what was the average time for one of his earlier splits?
Find the derivative using logarithmic differentiation
Graph of the function - sketch a graph of the function.
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