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Solar Energy in Different Weather: A student of the author lives in a home with a solar electric system
A study was conducted on the annual incomes of corporate trainers in the state of New York in metropolitan areas having a population less than 100,000
You work for a soda company. Last year a large survey found that 50% like you diet soda. This year a spot survey of n=900 found that 54% liked the soda.
A market analyst wants to determine the difference in the average price of a gallon of milk in Cleveland and New York.
Work through a t-test to compare the means of two groups of data. One possible example is to compare the tenure of females to the tenure of males
As a researcher evaluate the effectiveness of the workout programs purchased. This done by comparing the weight loss for a sample size of n=1 person
What factor determines whether you should use a z-score or a t statistic for a hypothesis test?
The average electric bill for residents of Anderson creek is at least 52.98 per month. Develop the appropriate null and alternative hypothesis
The average annual rent for office space in Tampa was 17.63 per square foot. A real estate agent selected a random sample of 15 rental properties
A consumer products testing group is evaluating two competing brands of tires, Brand 1 and Brand 2. Though the two brands have been comparable in the past
Explain each of the 5 hypothesis steps individually and in detail.
A consumer electronics firm has developed a new type of remote control button that is designed to operate before becoming intermittent.
A sample of 64 observations is selected from a normal population. The sample mean is 215, and the sample deviation is 15.
Mary claims to be able to hypnotically cause her clients to perform significantly higher on the SAT. The national mean is 1200 with a standard deviation
A furniture store claims that a specially ordered product will take, on average, M = 35 days (5 weeks) to arrive. The standard deviation of these waiting times
A company implemented a safety program designed to reduce the number of work related injuries. Human Resources department collected the following data
You have collected the following data from two suppliers. Are the suppliers significantly different at the 0.05 level of significance?
Dunkin Donuts advertises that a dozen of their donuts weighs about 43 oz. A certain baker has figured out that she can stay out of trouble with her manager
In an investigation of the possible brain damage due to alcoholism, CAT scans were used to measure brain densities in eleven chronic alcoholics.
A personal computer manufacturer is interested in comparing assembly times for two keyboard assembly processes
The data that you will be using for this exercise came from a survey of two insurance carriers.
You are provided with the male and female unemployment data for the 1960-2005 periods.
The Business Administration department at a local university delivers some of its courses using online instruction
How investors assess the stability of a public company? What are the key financial ratios that measure the stability of an organization? Define stability.
A hypothesis states a difference exists between two populations. Sometimes this is an obvious conclusion because the means will be very different