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A survey of 1305 people who took trips revealed that 96 of them included a visit to a theme park. Based on those survey results, a management consultant claims that less than 8 % of trips include a
State the null and alternative hypotheses for testing Matt's claim. (Type the symbol "p" for the population proportion, whichever symbols you need of "<", ">", "=", "not =" and express any val
Is there sufficient evidence to support the claim that men have a higher rate of red/green color blindness than women, yes or no? Use a 1 % significance level. Construct the 99% confidence interval
Suppose on your twenty-fifth birthday you opened a retirement account with the Howard Fund - a fund paying investors 8 percent return compounded yearly on their investments - with a threethousand do
How long does it take to double an investment of $1000 deposited in an account paying 6% annually compounded monthly?
A study examining the correlation between caffeine and consumption and the speed of running during an athletic event has yeilded a value of +.65 for pearson r.
In the second community, a random survey of 90 households showed the mean household size was 4 with a standard deviation of 6. Assuming a significance level of .01, test the hypothesis that the two
The mean weight for a random sample of 16 ball bearings is 28.4 g with a standard deviation of 4.2 g. At the 0.05 significance level, test the claim that the sample comes from a population with a me
If you were to test the claim that there is a positive linear relationship between the explanatory and response variable, what would your null and alternative hypotheses be?
Total of 203 adults selected at random were cross-classified according to their gender (male; female) and their political affiliation (Democrat; Neutral; Republican). The table below features the re
Consider a customer service facility that is staffed with 2 representatives. We assume that the amount of time a customer spends with a representative is exponentially distributed with an average s
In studying the occurence of genetic characteristics, the following sample data were obtained. At the 0.05 significance level, test the claim that the characteristics occur within the same frequency
Tracking a ballistic missile with normal distribution measurement error. Estimate the value of ssa that gives smallest tracking error.
Suppose that incoming lots are 0.5% nonconforming. What is the probability of rejecting these lots under both plans?
Assume you are using a significance level of ?=0.05 to test the claim that ?<10 and that your sample is a random sample of 34 values. Find ?, the probability of making a type II error (failing to
A recent survey showed that among 850 randomly selected subjects who completed 4 years of college, 183 smoke and 667 do not smoke. Determine a 95% confidence interval for the true proportion of the
A newspaper conducted a statewide survey concerning the 1998 race for state senator. The newspaper took a SRS of n=1200 registered voters and found that 620 would vote for the Republican candidate.
Dylan wants to determine a 80 percent confidence interval for the true proportion of high school students in the area who attend their home basketball games. How large of a sample must he have to ge
Barna Research group collected data showing church attendance by age group (USA Today, November 20, 2003). Use the sample data to determine whether attending church is independent of age. Use a 0.05
The operator of a large production plant would like to estimate the mean amount of time a worker takes to assemble a new electronic component. Assume that the standard deviation of this assembly tim
There seems to be evidence that the patients taking the antidepressant drug have a different success rate of not smoking after one year than the placebo group.
At the .100 significance level, can the manufacturer conclude that the price reduction resulted in an increase in sales? Hint: For the calculations, assume the Reduced price as the first sample.
A candy maker produces mints that have label weight of 20 grams on each box. Assume that the weight of a box of mints is normally distributed with a standard deviation of 0.4 grams. Determine the sa