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We wish to estimate the average daily yield of a chemical manufactured in a chemical plant. The mean daily yield was recorded for 50 days
In comparing purchases from 2 companies, a sample of 16 purchases from Cambells with the mean $ 11, 045 and Standard Deviation of $ 835 is taken
T test to evaluate one set of data points with another set of data points Use t test testing to evaluate which set of data points (population)
Id the average IQ of a group of researchers is quoted to be 260. Thinking that this figure is too large, consulting firm tested a random sample
A claim is made that the mean height of police officers is 5feet 11inches. To test whether this claim is true or not, a random sample of 25 police officer
A real estate agent gathered data from homes that recently sold in two local neighborhoods. It was decided to test to determine the relationship
A study examines self-esteem and depression in children. A sample of 25 children with low self- esteem is given a standardized test for depression.
It starts out by stating, you are given the responsibility fo presenting the results of a yearlong study of a teaching strategy to the school board.
Once all the data is collected, average glucose levels are then calculated for each individual - one for the 30 observations collected prior
Rental card gasoline prices per gallon were sampled at eight major airports. Data for Hertz and National car rental companies follow:
The Commercial Bank and Trust Company is studying the use of its automatic teller machines (ATMs). Of particular interest is whether young adults
In Sweden, a scientific journal stated that the average woman is 69 inches tall, with a standard height deviation of 2 inches
Assume that you want to test the claim that the paired sample data come from a population for which the mean difference is = 0. Compute the value of the t test
What is the role of simulation in statistical problem solving? Can you provide two examples of simulation in SPS?
Ms Moline is the budget director for Nexus Media Inc. She is comparing travel costs for sales and the audit staff. She collected the following sample data:
You are concerned about wait times at the cash registers in the supermarket. You collect data and have a sample size of 10, which test would you use a Z or a T
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