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With n = 66 and sample mean of $3903 and known standard deviation of (sigma) = $801; Determine and describe a 95% confidence interval for population mean M.
Assume that you want to test the claim that the following paired date come from the population for which the mean difference is Md = 0. Do the complete hypothesis test and describe your decision.
500 of the voters are randomly chosen and asked whether they planned to vote for democratic incumbent or the Republican challenger. Of 500 surveyed, 400 said they would vote for Democratic incumbent
Truck tire life is normally distributed with the mean of 70,000 miles and standard deviation of 5,000 miles. Based on buying four tires from a manufacturer, determine the probability that a tire wil
If a men's basketball team shoots 70% on free throws. If we randomly pick a player to shoot 5 free throws, determine the total probability that he makes 2 OR less?
Given: mean value 10000, and standard deviation 500, random sample size n = 40
Two random variables and their possible values, and joint pdf of (X,Y), and the function.
Let Y be a random value with the pmf in the table
Find out the probability that at least 2 women are on the committee.
Calculate the number of ways that a committee of 3 students which has at least 1 girl can be selected from the group
In sentence, determine the null hypothesis being tested. Using symbols, determine the null hypothesis and the alternative hypothesis. Conduct the hypothesis test using a two-tailed test with a a=.05
Find out the mean of the sampling distribution of the sample mean. Find out the standard deviation of the sampling distribution of the sampling mean
You want a confidence level of 95% with the significance level of 0.05. You find out the mean number of hours spent studying per day to be 2.4.
In the survey of 200 students, it was found that 60 students said English wasn't their first language. Make a 95% confidence interval for true proportion of students whose first language isn't Engli
Determine whether the following events are independent or dependent being african american or any person of color increased in the poverty stricken part of the big city and going to college for highe
Your grade in the class consists of 2 midterms 15% each, homework 10%, project 5%, attendance 10%, and final 30%. Determine weighted mean if your scores are as follows.
When assessing the appropriateness of the regression line, it is often helpful to examine a residual plot. A residual plot is a scatterplot of the (a) x values (b) y^ values (c)residuals plotted aga
You desire to reward 2% of the customers that wait the longest amount of time. So what should you tell your customers regarding minimum waiting period before they can get reward?
Suppose that the mean and standard deviation of nicotine in cigarettes haven't changed. Determine the probability of randomly selecting 50 cigarettes with a mean of .893 or less. Would you agree wit
A new drug named CURAIDS that is 60% effective in extending average life of AIDS patient by twenty years. Five randomly chosen AIDS patients from Africa are treated with this new drug. Answer follo
You're curious to know whether Hartnell College students on average study more than three hours per day. So you surgery 30 students randomly and ask them individually about number of hours they stud
A toy manufacturer ships toys from 3 plants to three regional distribution centers. The shipping costs per carload, plant capacities (in carloads) as well as demands (in carloads) are given below. S
In the past, n = 50 fuses are tested each and every hour and pbar = 0.03 have been defective. Compute the UCL and LCL. After a production error, assume that the true p shifts to p = 0.05.
A population include five numbers 1,3,5,7,9. Assume we randomly choose three of those five numbers without replacement and calculate the sample mean and sample median, of the three numbers selected