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Q1) A random sample of ages of 51 college students has mean of 15. Population is known to be normal with standard deviation of 2.
a) Compute standard error of mean?
b) Compute the margin of error, with 95% confidence.
Q2) Average hourly wage of workers at fast food restaurant is $6.50/hr with standard deviation of $0.45. Suppose that distribution is normally distributed. If worker at this fast food restaurant is chosen at arbitrary, determine probability that worker earns more than $6.75?
Q3) Recent study found that average life expectancy of person living in Africa is 53 years with a standard deviation of 7.5 years. If person in Africa is chosen at random, determine the probability that person will die before the age of 65?
Calculation of cost of capital -What are some of the potential problems with this approach in this situation and What improvements might you suggest and why?
A firm in perfectly competitive 'industry has this cost function: TC = 900 + q^2-If market demand is QD = 1800 - 20P, what is the long-run equilibrium price, quantity produced by the firm and the industry, and the number of firms in the industry?
What is the mean and standard deviation of the sampling distribution when we take all samples of size25?
Calculation of cost of preferred stock, cost of debt, and cost of issuing new stock - The financial motives for merger.
Determine point estimate of population mean? By using 90% confidence, determine the margin of error?
Determine the interest expense that Coley Co. will show with respect to these bonds in its income statement for the fiscal year ended September 30, 2009, assuming that the discount of $360,000 is amortized on a straight-line basis.
The one-sample t statistic has the value t = -1.68. What do we know about the P -value of this test?
Explain her change in consumption in terms of income and substitution effects (give a precise quantitative answer). Is this a Griffin good (how do you know)?
What is the total interest expense over the life of the bonds cash interest payments? Premium amortization?
Define the rejection region. State the statistical decision.
A savings account was opened for a baby on 1985 with a $100 deposit. No withdrawals or deposits occurred since the account was opened. The current balance of the account is $246.47. Measured in dollars of the year in which the account was opened, how..
Take a confidence interval for the difference in the average of renting between the first andthird hotel.
What is the probability that the project will be completed in 17 months or less?
Probability distribution described by the following density curve and The expected value of the sum of the weights of the two oranges, in pounds
The Pearson Product-Moment Correlation Coefficient (r) is a measure of linear relationship between two variables.
Find out sample correlation coefficients of (I) age with dry weight, and (2) age with log 10 dry weight. Interpret your results.
What was the highest score earned on the exam? According to Chebyshev's Theorem, how many students scored between 42 and 74?
If random sample of thirty six customer transactions points out that sample mean withdrawal amount is $172, is there evidence to think that population mean withdrawal amount is no longer $160? Determine the mean of data above?
Create a 90% confidence interval for proportion of all kernels that would not pop.
What is the probability that the sum of their scores exceeds 1200 and probability that the average of the scores of all 400 student
The data in the scatterplot below are an individual's weight and the time it takes (in seconds) on a treadmill to raise his or her pulse rate to 140 beats per minute. The o's correspond to females and the +'s to males.
We want to test the hypothesis that the population variances are equal.
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