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The random variable x is number of houses sold by realtor in single month at real-estate office. Calculate standard deviation of random variable.
Let x¯ denote mean age of the random sample of n = 50 students. Find out mean and standard deviation of random variable x¯.
Find the probability that 15 randomly selected jars of this brand of salsa will have the mean weight of less than 660 grams.
Plot the following parabolic functions in Excel and then answer the discussion question below . Use at least 8 points for each plot:
Use the data to get 90% confidence interval evaluate for mean starting monthly salary, µ, of all recent graduates with bachelor's degrees in marketing from university.
A group of investors wants to develop a chain of fast-food restaurants. In determining potential costs for each facility, they must consider, among other expenses, the average monthly electric bill.
In a survey of 8000 woman, 5431 say they change their nail polish once a week. Construct a 99% confidence interval for the population proportion of woman who change their nail polish once a week.
Suppose that ages are normally distributed with standard deviation of sigma = 0.8 year. Find 95% confidence interval for mean age, µ, of first semester college dropouts.
State appropriate null and alternative hypotheses for question. Perform statistical test of null hypothesis at significance level of 5%.
In support of decision illustrate null and alternative hypothesis and value of test statistics computed for assessing significance level.
How many subjects are needed to estimate the number of books read the previous year within one book with 99% confidence? Initial survey results indicate that standard deviation = 17.1 books. A 99%
What does slope for regression line represent in terms of current GPAs? Use regression equation to forecast current GPA of student with entering GPA of 3.6.
A large part of workflow processes is embedded learning theories. How will the organization teach the workflow process in order to reach Knowledge products?
Can your idea be tested with any of the different types of experimental designs? Why or why not? What is your design? Why have you chosen that design?
The amount of paper used by 30% so you change shape of newspaper to a parallelogram. Find the height of the parallelogram-shaped newspaper?
It is commonly supposed that the stock market yields a 10% rate or return (on average) on investments made in market long term. Write down an essay looking at the advantages and disadvantages of inv
At last it was decided that they would produce banner for each possible arrangement of four symbols. How many different banners were to be placed along course?
Assuming your account is earning (prime interest rate + 4%) in interest, compounded monthly, how much do you have in your account at the age of 70? Hint: Treat each time that you change the deposit
Two people, Ella and Jane, decide to start saving for retirement. Ella decides to invest $4000 a year in an annuity at age of 25. At the age of 35 she stops making investments and just leaves the mo
You wish to deposit $500 per month into an account for 36 months. Suppose your interest rate is equal to prime interest rate.
Determine at least five regular household items which are shaped like rectangular prisms or cylinders. You should have at least one prism and one cylinder.
All coins looked same, but fake was slightly lighter. Collector used balance scale and two weighings to discover false coin. How was it done?
The local varsity club spent 40% of its budget on art supplies, 15 percent on t-shirts, 10 percent on photocopying. If the amount remaining in the budget is $420, how much did they spend on art supp
To have the average of at least 90 for grading period, determine the lowest score Chelsea can get on final test?
Compute 2σ (sigma) control limits. The centerline must be based on data from these 15 days. All calculations must be to three decimal places (x.xxx).