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you are a travel agent and wish to estimate, with 95% confidence, the proportion of vacationers who plan to travel outside the united states in next 12 months your estimate must be accurate within 3% of the true proportion A. no preliminary estimate is available firnd the minumum sample size needed, b. find the minimum sample size needed , using a prior study that found that 26% of the respondants said they planned to travel outside the US in next 12months, c. compare results from a & b.
Find out the range of the following set of whole numbers: 12, 13, 15, 17, 12, 18, 12, 19, 13, 12, 14, 13, 12, 15
Suppose a t- test is being applied to find out if the population monthly expenditure mean is less than $212. The level of significance selected is 1% and 26 accounts are sampled. What is the critical value?
At the .05 significance level, can we conclude that the mean waiting time is less than 3 minutes?
Data in table represent number of consumer complaints against major U.S. airlines. If one complaint from table is arbitrarily chosen, determine the probability that it was filed against United Airlines.
Sales of a product are influenced by the salesperson's level of education and gender, as well as consumer income, ethnicity, and wealth.
At the 1% significance level, can it be concluded that the current distribution of responses differs from that of a year ago ?? Formulate and test the appropriate hypotheses. Use the critical value approach.
For patients over age 80, probability is 0.05 that coronary bypass patient will die soon after surgery, if hospital performs eight such operations, determine the probability of two or more fatalities?
Based on its position in the periodic table of the elements, which pure element would also react violently with oxygen and water?
Which test do we use to see if the difference in our sample is statistically significant? Why? Should it be one or two-tailed?
Explain the effect that changes in η and β have on the shape of the Weibull density and the effect that they have on γ3 and derive an expression for the coefficient of skewness for the Weibull distribution.
A probability value of .25 means that an event will occur:
The port of Trop can service only 1 ship at a time. However, there is mooring space for 3 more ships. Trop is a favorite port of call, but, if no mooring space is available the ships have to go to the next port.
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