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10 people taste wine A and wine B, X= denote the number prefer A. Assume that all others prefer B. These people random sample..
1- is X=9,a 95% CI for the true proportion who favour A is(.54,1)
2- if X=10,and we test nullH of no differ. in preference between wines the P-value is equal to.0020
Why these 2 choices are wrong??and how to calculate P-value ??
Determine the sample size needed in order to be 99% confident that the sample proportion of the current customer accounts is within .03 of the true proportion of all current accounts for this company.
Using a separate 2 by 2 table, compute predictive value positive and predictive value negative for population of 1,000 drug users.
Ethics The one-time fling! Have you ever purchased an article of clothing (dress, sports jacket, etc.), worn the item once to a party, and then returned the purchase?
Are all the events in this distribution mutually exclusive? Describe in detail.
A arbitrary sample of 8 students is selected. Illucidate the probability that among the students in the sample at least 7 are female.
You take a random sample and perform a hypothesis test, getting a p-value of 0.2578. What is the appropriate conclusion? Conclude at the 5% level of significance.
N=120, population standard deviation is (known) 5, alpha =.05, standard error of the mean (sigma of xbar)= .46, h0 is rejected if xbar
Absenteeism is distributed evenly throughout the week. The 0.01 level is to be used. The sample results are:
The inside diameter of a randomly selected piston ring is a random variable with mean value 12 cm and standard deviation 0.02 cm.
In a large western university, 15% of the students are graduate students. If a random sample of 20 students is selected, what is the probability that the sample contains:
You manufacture and sell an iron rod whose electrical conductivity is supposed to be 10.1. You plan to make 6 measurements of the conductivity of a rod you plan to sell.
Calculate the mean, median and mode for both sets and do graph/histogram to chart the results and conclude if indeed one set of year had more the other as far a snowfall.
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