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A sample of 25 shoppers at a local pet store are asked how many cats and dogs they have. The sample mean is calculated and then the deviation and deviation squared of each response is calculated. Below are the sums of eachcolumn. Using that information, calculate the standard deviation.
Survey Response , Deviation , Deviation^2
0 374
3. Below is the mean and standard deviation of annual doctor salaries broken down by specialty. Which one has the greatest relative spread (hint: coefficient of variation).
Specialty Mean (in thousands of dollars) St. Dev.(in thousands of dollars)
Cardiology 410 105
Oncology 330 90
Pediatrics 202 85
a study of cats and dogs found that 25 of 45 cats and 44 of 60 dogs slept more than 10 hours per day. at the .05 level
A regression analysis was carried out to predict a firm's reputation (defined on a scale called the Carter-Manaster reputation ranking) on the basis.
Determine percentage of boys in this age range have carbohydrate intake above 140g/1000cal and carbohydrate intake below 90g/1000cal?
External auditors are hired to review and analyze the financial and other records of an organization and to attest to the integrity of the organization's financial statements. In recent years, the fees charged by auditors have come under incre..
Ten pairs of points yielded a correlation coefficient y of 0.79. If a=0.05, which of the following statements is correct if H 0:P=0? (Do not calculate a t-value.)
If a gambler rolls two dice and gets a sum of four, he wins $10; and if he gets a sum of three, he wins $25. The cost to play the game is $5. What is the expectation of this game?
a presidential candidate plans to begin her campaign by visiting the capitals in 4 of 47 states. what is the
Golfers arrive at the starter s booth of a public golf course at a rate of 8 per hour during the Monday-to-Friday midweek period.
the weekly income of night cashiers at a major department store follows the normal probability distribution. the
Calculate separate confidence intervals for the numbers of days absent for Clinic A and Clinic B, respectively.
mileage tests were conducted on a randomly sample of 100 new tires. the avg. tread wear was 50000 miles with standard
In the game of bridge, a player is dealt a hand of 13 playing cards from a standard 52 card deck. A hand is said to have a void in a suit if it contains no cards in that suit
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