Homework Help Classof1: 424 books

"A fast food restaurant strives to serve 80 customers per hour during its peak lunch hour.  It samples 30 shifts (i.e. 30 peak lunch hours) to determine whether it is meeting this expectation.  The sample mean is 75 customers.  The population standard deviation is known to be...

According to Advertising Age, the average base salary for women working as copywriters in advertising firms is higher than the average base salary for men. The average base salary for women is $67,000 and the average base salary for men is $65,500 (Working Women, July/August 2000). Assume salaries are normally distributed and that the standard deviation is $7000 for both men and women.

Given the function, f(x,y), identify each stationary point as a local max, local min, or saddle point

Five neighborhoods (NB) all want to raise money for a playground for their kids. The neighborhood that raises the most money will be able to choose the name of the park. To raise money, they all decide to have a bake sale and sell cookies (C), cakes (K), and muffins (M). They plan to sell their bake...

a) What is the probability that the machine is in adjustment? b) The first unit produced after the calibration effort to be found to be defective. What is the probability that machine is in adjustment?

"Astronomers discover a binary star system that has a period of 93.0 days. The binary star system consists of two equal-mass stars, each with a mass twice that of the sun, that rotate like a dumbbell about the center of mass at the midpoint between them. How far apart are the two stars? "

The p-value for a test statistic is .085, what is the minimum level of significance required to reject the null hypothesis? a. 0.10 b. 0.05 c. 0.01 d. 0.085

A test was conducted to determine whether gender of a spokesperson affected the likelihood that consumers would prefer a new product.  A survey of consumers at trade show employing a female spokesperson determined that 70 out of 150 customers preferred the product while 62 of 180 customers preferred...

"1. At a college library exhibition of faculty publications, four mathematics books, four social science books, and four biology books will be displayed on a shelf. (a) In how many ways can the twelve books be arranged on the shelf? (b) In how many ways can the twelve books be arranged on the...

"For the first SLP I want you to put into practice what you have learned about sets and counting.  I want you to create three sets, set A, set B, and set C by going through the items in your wallet or purse.  Set A will be a list of all of these items.  Create Set B, from the...

"Use augmented matrices to solve the following   systems of equations. "

"Solve for X, Y, and Z using either substition or elimination methods: X + 2Y + Z = 6 X + Y  = 4 3X + Y + Z =  8 "

Cobalt-60 is radioactive isotope used to treat cancers. A gamma ray emitted by this isotope has an energy of 2.13 x 10—13 J. What is the wavelength (in meter) of this gamma ray?

Give a description of the physiological relationship between vision, smell and taste.