Suppose you were presented with the following prediction regression equation: Yhat = 30,000 + 2,000 (X) where the dependent variable is annual salary and the independent variable is years on the...

A manager restaurant wants to test his customer's favorite of newly introduced coffee based on gender. The manager feels that male customers prefer to order coffee than women. The data below shows...

In a large Statistics class, suppose 50% of students are studying a Bachelor of Science, 20% are studying Forensic Science, 10% are studying Environmental Science and the remaining 20% are from a...

a candidate must win 263 of the total of 523 votes in an electoral college. Let's suppose that the largest region gets 52 votes. Assuming that a candidate wins this region, the number of additional...

An electric company found the relationship between house size (x, in square feet) and monthly electric bill (y, in dollars) is given by yˆ y ^ = 0.03x + 18.50. Use this least squares...

A local board of education conducted a survey of residents in the community concerning a property tax levy on the coming local ballot. They randomly selected 850 residents in the community and contacted...

Quick Start Company makes 12-volt car batteries. After many years of product testing, the company knows that the average life of a Quick Start battery is normally distributed, with a mean of 43.6...

Gasoline mileage is to be compared for two automobiles, A and B, by testing each automobile on five brands of gasoline. Each car used one tank of each brand, with the following results (in miles per...

Researchers conducted an experiment to test the effects of alcohol. The errors were recorded in a test of visual and motor skills for a treatment group of  24 people who drank ethanol and...

find the required sample size for sample to construct a 95% confidence interval for the population meant that has sampling error SE=0.25, and it is given that population standard deviation is 7.5...

A temperature measurment F in degrees Fahrenheit can be converted to a measurement C in degrees Celsius using the formula C=(5/9) (F-32). Suppose 10 measurments in Fahreheit have a  mean of 86...

Suppose 5% of the population has O-negative blood type, making them universal blood donors. If 20 people come to donate blood (a random sample from the population), the probability that at least 2...

The observed yields are given in the following table. Control 3.3 3.6 3.8 3.9 4 4.1 4.4 Fertilizer 4.3 4.7 5.3 5.4 5.7 A rival researcher claims that adding fertilizer to the soil...

I would really appreciate the help guys! Thanks again ! 1) Use a 0.01 significance level to test the claim that the mean number of words spoken in a day by men is less than that for women...

I need to know how to solve this problem I am having trouble finding the answer