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For the data on vehicles produced in Mexico, construct a bar chart displaying the amount produced by each company.
Suppose instead the econometrician gets both students to enter each form independently. What is the probability that both students will make at least one mistake when entering the same form?
The dean wants to know who applies o MBA programs. Determine the frequency distribution. What do the chart tell you about the sample of MBA applicants?
In addition, the portfolio is limited to a max of 1000 shares of u.s oil. The linear programming formulation that will maximize the total annual return of the portfolio is as follows.
The temperature in December in Buffalo, New York, is often below 40 degrees Fahrenheit (4 degrees Celsius). Determine the variance and standard deviation.
We test nullH of no differ. in preference between wines the P-value is equal to.0020. why these 2 choices are wrong?? and how to calculate P-value ??
Historically, 18% of professional tour golfers use Nike golf balls. Find the critical value (or values), and clearly show the rejection and nonrejection regions.
A random sample of 7 students selected from a large class revealed the following scores: midterm 70, 62, 57, 68, 89, 63, 82 and on the final 80, 79, 87, 88, 85, 79, 91. Is there evidence of an impro
Compute the 95% confidence interval for the population proportion of registered voters who favor the slow growth initiative.
How large a sample size will need to be selected if we wish to have a 99% confidence interval with a margin for error of .10 oz?
Selecting a customer at random, find the probability that the customer uses between 1,500 and 2,500 kilowatt hours in January.
How many standard deviations is the sample mean from the mean of the distribution of sample means? b. In general what is the probability that a random sample of size 36 has a mean of at least 15.67
After monty shows you what's behind curtain C, what is the probability that the car is behind curtain A? what is the probability that the car is behind curtain B?
Data is normally distributed and s= 12.324 dollars. Construct and interpret a 90% confidence interval for the standard deviation travel tax for a 3-day business trip.
Construct a 99% confidence interval for the proportion of Americans who live in neighborhoods with acceptable levels of carbon monoxide.
How many people are needed to estimate the number of hours people watch television per week within 2 hours with 95% confidence?
Determine and interpret a 95% confidence interval for the mean amount of time Americans age 15 or older spend eating and drinking each day.
The standard deviation is 100. If a random sample of 200 scores were selected and the sample mean were calculated to be 1050, would you be surprised? Explain.
Obtain descriptive statistics and graphic displays for these salt-taste indices. Do the indices appear to be normally distributed? Why or why not?
The estimated miles per gallon ratings of a class of automobiles are normally distributed with a mean of 12.8 and a standard deviation of 3.2. What is the probability that one of these automobiles s
Sun Microsystems has approximately 50% of the high-end Unix machines market with its closest competitor being IBM. What is the probability that exactly 8 firms purchase a Unix machine from Sun Microsy
If a quarter has high productivity, what is the probability that the quarter has a small pay increase? Are the events of productivity and amount of hourly pay increase independent? Explain.
The variable that you are looking to use as a predictor; and (b) is the intercept. Predict GPA from the following ACT scores using the regression equation/straight line formula (show all your work):
She randomly samples 67 CFOs and ?nds that 40 of them get their money news from newspapers. Does the test show enough evidence to reject the ?ndings of Robert Half International? Use a = .05.
Assume gasoline prices for a region are normally distributed. Do the data you obtained provide enough evidence to reject the claim? Use a 1% level of signi?cance.