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The taste test for PTC (phenylthiourea) is a common class demonstration in the study of genetics. It is know that 70% of the American population are "tasters" and 30% are "non-tasters". Suppose a genetics class of size 20 does the test to see if they match the U.S. percentages of "tasters" and "non-tasters". Assume the assignment of students to classes is a random process.
a.) Write the expression for P(X = 15 tasters) using pk(1-p)n-k notation.
b.) Use your calculator to evaluate the expression in a.).
c.) Using the notation in part a.), write out all of the probabilities need to evaluate P(X < 5 non-tasters). Use your calculator to evaluate the probability.
d.) Explain what probabilities you would use to evaluate P(3 < X < 9)
Assuming that the distribution of the salaries is normal, what is the probability that the average for this sample is between $36,000 and $42,000.
Compute a 3-month moving average forecast of demand for April through January (of the next year).
In 1992, the FAA conducted 90,000 pre-employment drug tests on job applicants who were to be engaged in safety and security-related jobs, construct a 95 percent confidence interval for the population proportion of positive drug tests.
a study by the national park service revealed that 50 of the vacationers going to the rocky mountain region visit
1 the speeds of car traveling on interstate highway i-35 are normally distributed with a mean of 74 miles per hour and
Would you be able to assist me in completing a 5 step hypothesis test on both hypotheses (1 parameter & another with 2 or more)? In completing this test, I need to explain how to complete it.
Calculate the probability that a randomly selected egg weights between 62.5 g and 68.75 g. Think of cartons of such eggs as SRSs of size 12 from the population of all eggs.
a sample of 66 women over the age of 50 used the new cream for 6 months. of those 66 women 30 of them reported skin
Describe how the confidence intervals will change depending on whether the population standard deviation is known or unknown.
Farley purchases and pays for merchandise 60% in the month of acquisition and 40% in the following month. Accounts payable is used only for inventory acquisitions. How much cash will Farley receive during November?
Do these data suggest that the amount of time devoted to urban problems in acceptance speeches of newly elected representatives to the U.S. Congress differ according to whether they come from rural or urban districts?
Of 146 adults selected randomly from one town, 31 of them smoke. Construct a 99% confidence interval for the true percentage of all adults in the town that smoke.
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