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Six people have declared their intentions to run for a county commission seat in the next general election. A political poll is conducted three-quarters of the way into the campaign to determine if there are any clear preferences on the part of the voters. One thousand twenty randomly-selected voters were asked to indicate their choice. The responses are presented in the table. (Use the Ch-square method.)
Candidate Number of responsesA 180B 240C 200D 130E 125F 145
Test the appropriate hypothesis to determine if there is a preference among the candidates. (Let the significance level = 0.05)
A leasing firm claims that the mean number of miles driven annually,M , in its leased cars is less than 13020 miles. A random sample of 90 cars leased from this firm had a mean of 12750 annual miles driven.
Professor wishes to determine whether prior statistical knowledge assists students in their performance on the final exam. What is the relationship between pretest scores and final exam scores after controlling for cumulative GPA. What SPSS test w..
Assume that a simple random sample has been selected from a normally distributed population and test the given claim. Use the p-value method for testing hypotheses.
The firm has already decided that any sample mean below 78 or above 82 will signal the workers that the process is not working properly.
A random sample of 41 basketball players from The Official NBA Basketball Encyclopedia gave the sample standard deviation for player height as s=3.32 inches.
If the loss of weight of customers at the end of their first month is normally distributed with a mean of 6.7lbs and a standard deviation of 0.81lbs
The formula for the ratio is the mileage that 14 students drive to work out of 20 students. Compute the central tendency (mean, median, mode) and dispersion (range, variance, standard deviation).
Genetics of peas. According to genetic theory, the blossom colour in the second generation of the certain cross of sweet peas should be red or white in a 3:1 ratio. That is, each plant has probability 3/4 of having red blossoms, and the blossom co..
The distributor selects one cable at random from among all cables in stock. If the cable selected is found to meet the strength specifications, what is the probability that the cable was produced at Plant A?
The cost of one serving of peanut butter ( in cents) for a random sample of 19 jars of peanut butter was found to be:
A machine fills containers with a mean weight per container of 16oz. If no more than 5% of the containers are to weigh less than 15.8oz, what must the standard deviation of weights equal?
How large should n be so that Chebyshev's inequality guarantees that the estimate is within 5 centimeters from h, with probability at least 0.99?
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