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1) Below is the data set for the amount of trash by ten households (in pounds per day). Assume the population is normally distributed. Pounds of trash: 3.9, 4.6, 15.6, 10.5, 16.0, 6.7, 12.0, 9.2, 13.8, 16.8 Construct a 95% confidence interval for the mean based on the sample. Calculate the sample mean. Hint: use the t-table. 2) A random sample of 175 registered voters revealed that 54% of them voted in the last election. Construct a 95% confidence interval to estimate the true proportion of voter turnout. 3)A company claims the average time a customer waits for help is 4.78 min. The sample size is 35 customers. Assume the population standard deviation for wait time is 1.8 min. Test the company claim at the α = 0.05 significance level by comparing the calculated z-score to the critical z-score
The cost of one serving of peanut butter ( in cents) for a random sample of 19 jars of peanut butter was found to be:
What assumption about the population distribution is needed in order to conduct the t test in (a)?
Suppose that weights of bags of potato chips coming from a factory follow a normal distribution with mean 12.8 ounces and standard deviation .6 ounces.
Using a 2-month weighted moving average, with weights of 2 for the most recent month and 1 for the previous month develop forecasts sales for March to June inclusive.
Write the regression equation approximately. Computed the coefficient of determination(r 2 ).
If the probability that it will rain tomorrow is 0.33, then what is the probability that it will not rain tomorrow?
When is a factorial ANOVA used? Give Example. When is a chi square test appropriate? Give Example. When does linear regression versus multiple regression apply? Give Example.
Find a 95% confidence interval for the population mean concentration of uric acid in this patient's blood. What is the margin of error?
Provide one example in the accounting department that you can apply a contingency table to. Briefly explain how a contingency table can be useful.
If employee is chosen at random, determine the probability that employee is female and salaried staff? Choose the best answer from the following.
Determine the probability that Mary obtains exactly one Head.
A bond analyst is analyzing the interest rates for equivalent municipal bonds issued by two different states.
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