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Thirty (30 ) students were asked if they voted for Hilary Clinton or John Nosh for president. Eighteen (18) said that they voted for Hilary and twelve (12) said they voted for John Nosh.
a) Using the proportions obtained for Clinton and Nosh, determine the sample size required to be 99% confident that the error is within 2 percentage points.
Sample size n = _______
b) If we have no information about the proportion of votes that either candidate received, determine the sample size necessary to be 95% confident that the error will be within 4 percentage points.
At the 5% level of significance, can we infer that the population mean weight of athletic men is lower than the population mean weight of non-athletic men by more than 2 pounds?
there are 40 students in an elementary statistics class. on the basis of years of experience the instructor knows that
the transportation safety authority tsa has developed a new test to detect large amounts of liquid in luggage bags.
At the .02 significance level can we conclude that the mean time to correcting a shipment is less than 10 minutes? Do the following: Compute the value of the test statistic.
in a game of chance a number of draws are made with replacement from a box of tickets 500 of these tickets are labeled
A survey taken in a restaurant shows the following number of cups of coffee consumed with each meal. Construct an ungrouped frequency distribution.
An automobile manufacturer would like to know what proportion of its customers are not satisfied with the service provided by the local dealer. The customer relations department will survey a random sample of customers and compute a 99% confidence..
truth tables are useful for testing the validity of simple arguments but are not usually considered adequate methods
Conduct a hypothesis test using the .04 level of significance to determine if there is a difference between the population means.
a town has 20 000 registered voters of whom 8800 are democrats. a survey organization takes a simple random sample of
Company reveal that 70% of the workers are married, 36% are college graduates, and half of the college graduates are married. What is the probability that a randomly chosen worker is?
Suppose that $532,000 is to be allocated for advertising, research, and investment in the ratio 8:7:4. How much money will be allocated for each?
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