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Q1) Enterprising art historian just started new business: the production of walking tour audiotapes for use by those visiting major cities. She initially produced tapes for eight cities: paris , Rome. London, Florence, Jerusalem, Washington, New York, new haven. A test was performed to find out whether all 8 tapes (featuring various aspects of different cities) were evenly appealing to potential users. A random sample of 60 prospective tourists was chosen, 20 per city. Each person estimated tape he or she was given on the scales of 0 to 100. Results were analyzed using one -way ANOVA and included SSTR =7 , 102 and SSE = 10 ,511. Are all 8 tapes equally appealing on average? Determine p value?
We are establishing a quality control program for a process and need to establish the mean and standard deviation for the process. The first 10 batches had samples of size 5 taken.
You find that a random sample of five microwave ovens has a mean repair cost of $75 and a standard deviation of $12.50. At α = 0.01, do you have enough evidence to support the repairer's claim?
Assume that the number of left-handers is a binomial random variable. (Refer to the formula for mean and standard deviation for binomial prob. Distribution)
At.01 significance level is it sensible to conclude that modification decreased the number of traffic accidents?
A radio station wants to know if residents in their area are in favor of a proposed tax increase. They invite listeners to call in to respond to the poll. 645 of the 800 who responded were against the tax.
Calculate the probability that the median of the sample or average medians is:
The Price-to-Earnings ratio (P/E) of a publicly listed profit-making company is defined as the ratio of the stock price of the company to the earnings per share.
The chance both flights are full is 0.6. Are the two flights being full independent events and What was the mean ranking for the females in this class
Five test vehicles of each kind were crashed, with results given below. Research question: Are mean crash damages the same for these 3 vehicles?
What is the likelihood the sample mean is greater than $22.50 but less than $25.00?
What is the probability that there will be more than three trucks either being loaded or waiting?
Choosing the appropriate the sampling design for the given data
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