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The average amount parents and children spend per child on back to school clothes in autumn 2001 was $527. Assume the standard deviation is $160 and that the amount spent is normally distributed. what is the probability that the amount spent on a randomly selected child is more than $700?
Find the weighted mean of three test scores for a student (85, 90, 75) where the first test counts for 20%, the second test counts for 30%, and the third counts for 50% of the final grade.
Discuss a recent research project undertaken in the last 3 to 5 years. What type of analysis was conducted? What decisions were made?
A building contractor pays $500 to bid on a contract. If he gets the contract, the probability of which he estimates to be 0.70, he will make a profit of $50,000.
Determine the standard error of students that favoured the move.
Use Chebyshev's theorem to find what percent of the values will fall between 201 and 345 for a data set with a mean of 273 and standard deviation of 18.
The study does provide sufficient evidence to support the claim that less than 75% of college student spend less than $250 per semester on textbooks.
History suggests that the average number of hurricanes formed during a year is 6.0 hurricanes. Find the probability of at most three hurricanes being formed during a randomly selected year.
A study by Hewitt Associates showed that 79% of companies offer employees flexible scheduling. Suppose a researcher believes that in accounting firms this figure is lower.
Find out the probbility that exactly five arrive within two days?
In relative frequency histogram for a large set of GPAs, the mean and the standard deviation are 2.10 and 0.21 respectively. What proportion of GPAs falls within 1.68 and 2.52?
The National Turkey Association wants to experiment with three different feed mixtures for very young turkeys. Since no experience exists regarding the three mixtures, no assumptions can be made about the distribution of weights.
Find the equation of the regression line for the given data. What is the predicted value of Y when X = -2? What is the predicted value of Y when X = 4?
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