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Denver daily news conducted a study,. First, a random sample of nine grocery items was selected. Next, the price of each selected item was checked at each of the three chains on the sames day. Use 0.05 level of significance. What is the decision rule for both.
The scheduled commuting time on the Long Island Rail Road from Glen Cove to New York City is 65 minutes. Suppose that the actual commuting time is uniformly distributed between 64 and 74 minutes.
A mean of 45 months and a standard deviation of 8 months. if a random sample of 600 batteries is selected, how many batteries would weigh last more than 48 months?
A company has just manufactured 1694 CDs and 376 are defective. If 9 of these CDs are randomly selected for testing, what is the probablity that the entire batch will be accepted?
Are the events "Republican" and "30-44" independent? Justify your answer. Are the events "Democrat" and "65+" independent? Justify your answer.
Uniformly distributed in the interval -0.5 cents to 0.5 cents. What is the probability that the round-off error exceeds 0.3 cents or is less than -0.3 cents?
Solve the equations using linear algebra
Construct a scatterplot, find the value of the linear correlation coefficient r, and find the P- value using a= 0.05. Is there sufficient evidence to conclude that there is a linear correlation between systolic measurement and diastolic measuremen..
Will the distribution of x bar always be approximately normally distributed, or does it depend on the distribution of the population?
A share tipping service claims that its selections give an average return of 10% if held for 12 months. An investor wants to investigate this claim and records the returns of the last 20 shares that have met the 12 month period.
Estimated sales resulting from a $15,000 investment in inventory and an advertising budget of $10,000. Interpret b1 and b2 in this estimated regression equation.
The bin with replacement, find the probability that all the bulbs selected are good ones. Round to the nearest thousandth if necessary.
Is there evidence of a difference in the median performance between the two methods? (Use x = 0. 05).
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