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Prices of Toasters You took a random sample of 18 two-slice toasters and found the mean price was $65.49 and the standard deviation was $18.73. Assume the prices are normally distributed.
1. Which distribution, the t-distribution or the normal distribution, should be used for this problem?
State your reason why. If neither distribution can be used, explain why.
2. If you decided to use either the t-distribution or the normal distribution in question 13, construct a 90% confidence interval for the population mean. If you decided that neither distribution could be used, write "not applicable" for your answer.
a pizza shop offers nine toppings. no topping is used more than once. what is the probability that the toppings on a
A software company wants to determine whether there is a relationship between their three sales offices and the sales of their software products. The actual sales results are
If Kim expects to use phone for 21 hours per month, which plan must she choose?
Develop a scatter diagram for these data with years of experience as the independent variable and develop an estimated regression equation that can be used to predict annual sales given the years of experience.
What probability distribution does n1 alone have? Specify the values of the sample size index and parameter for that distribution
the pulse rates for 13 adult women were as follows. construct a 0.95 confidence interval for the mean pulse rate. give
the following data represent the percentage of people without health insurance for the 50 states and the district of
Calculate and interpret the appropriate statistical test to determine the relationship between the following two variables. Use the five-step model of hypothesis testing to draw conclusions at the .05 level of significance
What are the five steps in the hypothesis testing procedure, what does each step represent, what are the advantages and disadvantages of using a hypothesis testing procedure?
Develop a 90 percent confidence interval for the proportion of applicants that fail the test. (Round your answers to 2 decimal places.)
The chamber of commerce of a Florida Gulf Coast community advertises that area residential property is available at a mean cost of $125,000 or less per lot.
The snowball strikes the ground if it doesn't strike anything else while falling? (b) A man 1.9 m tall is standing 4 m from the edge of the barn. Will the snowball hit him?
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