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Suppose a recent poll of American Househoolds about pet ownership found that for households with one pet, 39% owned a dog, 33% owned a cat, and 7% owned a bird. suppose that three households with o
The mean price of ground beef in 75 cities in the midwest is 2.11 and teh standard deviation is .56. a midwest grocer is selling ground beef for 3.25. What is the price in standard units? Assuming t
IQ scores have a mean of 134. A sample of 13 people had a mean IQ of 129 with a SD of 9. Find the value of the test statistic. Round to three decimals.
Use the given data to find the minimum sample size required to estimate a population or proportion or percentage.
Since the P Value is (greater or less) than the level of significance (reject, or not reject) null hypothesis. There is or is not sufficient evidence to conclude that the fund has moderate risk at the
The Organization for Equality in the Workplace (TOEW) is studying the gender gap in starting pay for people with bachelor's degrees. Samples of 180 women and 190 men who recently graduated from Big
One concern about the depletion of the ozone layer is that the increase in UV light will decrease crop yields. An experiment was conducted in a green house where soybean plants were exposed to varyi
Being a wise student of statistics, you decide to stand back and observe the outcome of the next ten games before deciding whether to pay your three dollars to play the game. You have just conducted
The worker at a carnival game claims that he can communicate with a small magic rock and to prove it he tells you to hide it in your hand behind your back and he will identify the hand holding the r
A bicycle factory runs two assembly lines, A and B. 97% of line A's products pass inspection and 89% of line B's products pass inspection. 40% of the factory's bikes come off assembly line B and the
A biologist has found that 40% of all brown bears are infected with trichinosis. 10 brown bears are tested for trichinosis. What is the probability that less than 3 will have trichinosis? Please sho
Suppose that from the past experience a professor knows that the test score of a student taking his final examination is a random variable with mean 66 and standard deviation 11. How many students w
Use normal approximation to estimate the probability of getting less than 45 girls in 100 births. Assume that boys and girls are equally likely.
The 24 children in the passive group had these counts of correct identifications:
A selection of cereals was sampled and the number of calories was plotted against the number of grams of protein with the following results: Which of the following is NOT CORRECT?
Conduct a one-tailed hypothesis test given the information below. A manufacturer wants to increase the shelf life of a line of cake mixes. Past records indicate that the average shelf life of the mi
Calculate the Pearson Correlation Coefficient for these two variables.
Calculate the residual for the x, y pair ($62,511, $5,028). Did the regression equation underestimate or overestimate the net income?
The control group gets Sugar Pops. Final scores averaged 66 for the treatment group; the SD was 21. For the control group, the figures were 60 and 22. Find the p-value.
An exam was given to a random sample of 360 new recruits. P(x) is the probabiity of new recruits with a score of x. The battalion needs recruits with a score of 7 or higher on the exam. What is the
Alexander Industries is considering purchasing an insurance policy for its new office building in St. Louis, Missouri. The policy has an annual cost of $30,000. If Alexander Industries does not purc
A warped coin has probability of 0.5 of landing Heads, probability of 0.3 of landing Tails, and probability 0.2 of landing on its Edge. It is flipped 5 times. What is the probability that more Heads
What is the Taguchi constant for a device that costs $400 to repair and a tolerance of plus or minus 0.5 mm with a mean squared deviation from the target of 0.3?
The city was concerned that Brink's was stealing money from the parking meter receipts. Assume that this sample of months is like a random sample. Given your answers to the rst two parts, what is th
Calculate the expected number of bad checks the grocery chain will get in one week. Calculate the sandard deviation for the # of bad checks.