Basic Math question and answers for September 03, 2024
- Q Let x be a continous random variable that is normally distributed with a mean of u = 70 and a standard deviation of 4. Find the probability that x assumes...
- Q If you invest $6800 in a fund that pays 10% annual interest compounded monthly (12 times per year), how much will you have after 9 years?Use the formula for compound...
- Q Find the area under the normal distribution curve with ? = 20and o 4. (Keep 4 decimal places in your answers.)=a. Area between x = 20 and x = 29
- Q A group of adult males has foot lengths with a mean of 28.22 cm and a standard deviation of 1.22 cm. Usethe range rule of thumb to identify the limits...
- Q Suppose that the quantity supplied S and quantity demanded D of T-shirts at a concert are given by the following functions where p is the price.S(p)=-340+ 40pD(p) = 1100-50pAnswer parts...
- Q Consider two normal distributions, one with mean -4 and standard deviation 13, the other with mean 8 and standard deviation13. Answer the following statements using true or false.a) The two...
- Q (32,33,35,35,38,41,42,43,46,49)Calculate the mean absolute deviation for the data set shown above.
- Q A family purchased a new ski boat for $22,000. The loan agency required a 15% down payment and they financed the balance with a 60-month fixed installment loan with an...
- Q The Sky Train from the terminal to the rental car and long-term parking center is supposed to arrive every 12 minutes. The waiting times for the trainare known to follow...
- Q To estimate the accuracy of a laboratory scale, a weight known to have a mass of 98 grams is weighed 32 times. The reading of the scale is recorded each...
- Q The brain volumes (cm) of 20 brains have a mean of 1076.3 cm3 and a standard deviation of 126.6 cm. Usethe given standard deviation and the range rule of thumb...
- Q Watch your cholesterol: A sample of 290 patients between the ages of 38 and 82 were given a combination of drugs ezetimibe and simvastatin. Theyachieved a mean reduction in total...
- Q The total amount paid on a 5 year loan was $16,000. If the interest rate was 7% and compounded semi-annually, what wasthe principal? Round your answer to the nearest dollar.
- Q Translate to a system of equations and then solve.Mitchell left Detroit on the interstate driving south towards Orlando at a speed of 60 miles per hour. Clark left Detroit 1hour...
- Q Students in an experimental psychology class did research on depression as a sign of stress. A test was administered to a sampleof 30 students. The scores are shown below.43 51...
- Q Eighty-four percent of adults in a certain country believe that life on other planets is plausible. You randomly select five adults andask them whether they believe that life on other...
- Q A survey asks 1500 workers, "Has the economy forced you to reduce the amount of vacation you plan to take this year?"Forty-one percent of those surveyed say they are reducing...
- Q Sample annual salaries (in thousands of dollars) for employees at a company are listed.53 35 52 49 30 30 53 35 52 33 49 53 45(a) Find the sample mean...
- Q In IQ test was given to a simple random sample of 68 students at a certain college. The sample mean score was 105.6. Scores on this test are known to...
- Q Watch your cholesterol: A sample of 310 patients between the ages of 38 and 82 were given a combination of drugs ezetimibe and simvastatin. Theyachieved a mean reduction in total...
- Q Interpret a confidence interval: A dean at a certain college looked up the GPA for a random sample of 85 students. The sample mean GPA was 2.82, and a 95%...
- Q 79% of U.S. adults think that political correctness is a problem in America today. You randomly select six U.S. adults and ask them whether they think that political correctness is...
- Q Use the accompanying data set to complete the following actions.a. Find the quartiles.b. Find the interquartile range.c. Identify any outliers.61 54 58 63 58 64 63 64 62 58 55...
- Q 24% of U.S. adults say they are more likely to make purchases during a sales tax holiday. You randomly select 10 adults. Find theprobability that the number of adults who...
- Q Twenty-eight percent of U.S. employees who are late for work blame oversleeping. You randomly select four U.S. employees whoare late for work and ask them whether they blame oversleeping. The...
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