Stats Help for College-level Students

Probability: school children with asthma

A research company stated that 20% of missed school days are due to asthma. If a group of 400 school children are selected at random, what is the probability that fewer than 70 will miss school because of asthma? a) 0.1056 b) 0.0947 c) 0.1170 d) 0.4049 e) None of the above

Working with probability in a coin toss

If one flips a fair coin 5 times, what is the probability of not getting 5 tails?

Hypothesis Testing

3. Are stock splits beneficial to stockholders? SNL Securities studied stock splits in the banking industry over an 18-month period and found that stock splits tended to increase the value of an individual’s stock holding. Assume that of a sample of 20 recent stock splits, 14 led to an increase in value, four led to a decrease ...continues

Multiple regression: a. Complete the missing entries in this output. b. Compute F and test using level of significance = .05 to see whether a significant relationship is present. c. Did the estimated regression equation provide a good fit to the data on employees Explain. d Use the t test and level of signficance =.05 to test H0: b1 = 0.

Recall that in Exercise 45 the personnel director for Electronics Associates developed the following estimated regression equation relating an employee's score on a job satisfaction test to length of service and wage rate. Y = 14.4 minus 8.69 x1 minus 13.5 x2 Where X1 = length of service in years X2 = wage rate i ...continues

Probabilities

1.Find the probabilities for the standard normal random variable z: P(-1.551.38 4. Assume the heights of men have a mean of 69 inches with a stan ...continues

Multiple choice statistic questions: Chebyshev's Theorem, Standard Deviation, Coefficient of Variation, Relative Dispersion, Pearson's Coefficient, and Variance.

See attached file for full problem description. Multiple choice statistics questions: Chebyshev's Theorem, Standard Deviation, Coefficient of Variation, Relative Dispersion, Pearson's Coefficient, and Variance.

a. Determine the control limits for the mean and the range. b. Plot the control limits for the mean outside diameter and the range. c. Are there any points on the mean or the range chart that are out of control? Comment on the chart.

A new machine has just been installed to cut & rough-shape large slugs. The slugs are then transferred to a precision grinder. One of the critical measurements is the outside diameter. The quality control inspector randomly selected five slugs each hour, measured the outside diameter, and recorded the results. The measurements ( ...continues

NPV of projects

#1 The Acme Manufacturing has a project involving the purchase of equipment for $35,000 that will increase sales of Acme Manufacturing by $ 14,500 per year. The annual running costs of this equipment for the first 3 years are $ 1,000, $ 2,000, and $ 4,000 respectively. It will increase by $ 3,500 every year from then on. The e ...continues

Hypothesis Testing

Sampling problem and hypothesis testing. Please see the attached file.

Elementary Statistics

Elementary statistics, please provide me solutions with formulas and calculations. Its required that you provide step by step solutions to that I can compare my answers and fill in the attached answer sheet.