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A family has two cars. During one particular week, the first car consumed 30 gallons of gas and the second consumed 40 gallons of gas. The two cars drove a combined total of 1450 miles, and the sum of their fuel efficiencies was 40 miles per gallon. What were the fuel efficiencies of each of the cars that week?
Assume the probability that a person has the desease is 0.1 for all people, independently of each other. Compute the total expected number of tests necessary.
At 95% level of confidence, can we conclude that the babies using the Gibbs product gained less weight?
Find the 95% confidence interval for the true population mean. Identify the point estimate for mean and margin of error.
Normally distributed with mean equal to 15,000 and standard deviation equal to 1000. What is the lowest income among the richest 250 persons?
Find the probability that 5 randomly selected high school students will say that they exercise regularly. Express your answer for this item in percent.
A researcher has a series of Likert-scale items and a measure of frequency of absenteeism. He uses each of the Likert-scaled items in a separate bivariate correlation with absenteeism without testing for the assumptions of linear relationships. Is th..
Create a scenario where the binomial probability formula could be used to determine the probability of some number of successes, x, in some given number of trials,n.
Analysis of data sets assignment
What is the probability that the percentage in the sample will deviate from the population percentage by no more than 7 percentage points?
A statistic practitioner working for Major League Baseball determined the probability that the hitter will be out on ground balls is .75. in a game where there are 20 ground balls, find the probability that all of them were out.
Here is my data: these are the wages for women with a 2 yr degree, $11,702, $24,509, $34,746, $35,185 (median of $29,627) These are the wages for women with a 4 yr.
You are the manager of a fast food restaurant. You want to determine whether the population mean waiting time to place an order has changed in the past month from its previous population mean value of 4.5 minutes.
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