Basic Math question and answers for September 07, 2024
- Q A Food Marketing Institute found that 30% of households spend more than $125 a week on groceries. Assume the population proportion is 0.3 and a simple random sample of 481...
- Q Investors buy a studio apartment for $150,000. Of this amount, they have a down payment of $37,500. Their down payment is what percent of the purchase price? What percent of...
- Q A population of values has a normal distribution with =68.9 and ?= 34.3.A random sample of size n = 239 is drawn. Find the probability that asample of size n...
- Q Person A deposits $2700 in an account that pays 5% interest compounded once a year. Person B deposits $2550 in an account that pays 6% interest compounded monthly. Complete parts...
- Q The lengths of human pregnancies are normally distributed with a mean of 268 days and a standard deviation of 15 days. Given this information, find the probability of a pregnancy...
- Q Suppose 50 students took an exam with results that were approximately normally distributed. If the mean was 68 and the standard deviation was 10.5, use the normal model to determine...
- Q The area under a particular normal curve between 8 and 11 is 0.7794. A normally distributed variable has the same mean and standard deviation as the parameters for this normal...
- Q A variable is normally distributed with mean 10 and standard deviation 2.a. Find the percentage of all possible values of the variable that lie between 9 and 14.b. Find the...
- Q Records taken from a hospital show that the times between arriving patients have a mean of 8.7 minutes with a standard deviation of 8.7 minutes. Based solely on the values...
- Q Assume there is a certain population of fish in a pond whose growth is described by the logistic equation. It is estimated that the carrying capacity for the pond is...
- Q Determine the effective annual yield for each investment. Then select the better investment. Assume 360 days in a year.14% compounded monthly; 14.25% compounded annuallyThe effective annual yield for a 14%...
- Q A study finds that the carapace length of an adult spider is normally distributed with a mean of 19.55 mm and a standard deviation of 1.29 mm. Let x denote...
- Q How is a normal probability plot used to detect outliers?Choose the correct answer below.A. All observations are used to construct the normal probability plot, and any observations above 0 may...
- Q Based on a recent study, the pH level of the arterial cord (one vessel in the umbilical cord) is normally distributed with mean 7.26 and standard deviation of 0.15. Find...
- Q You invest $1950 in an account paying 5.9% interest compounded daily. What is the account's effective annual yield? Assume 360 days in a year.
- Q Mr. Jones has $10,000 to invest in three types of stocks, low-risk, medium-risk, and high-risk. He invests according to three principles. The amount invested in low-risk stocks will be at...
- Q A manufacturer produces a commodity where the length of the commodity has approximately normal distribution with a mean of 13.1 inches and standard deviation of 1.2 inches. If a sample...
- Q A student deposits $300 in a savings account that pays 4% annual interest. At the end of 9 years, how much money will be in the savings account? Round your...
- Q In an election, suppose that 65% of voters support a new tax on fast food. If we poll 187 of these voters at random, the probability distribution for the proportion...
- Q High school students bound for college take assessment tests. One test measures the verbal and mathematical abilities of prospective college students. Student scores are reported on a scale that ranges...
- Q You take a random sample of 500 people from the city of Salinas and find that theiraverage e income is $45, 000 per year with a standard deviation of $10,...
- Q On a common measure of extroversion, the general population has an average score of 51 with a standard deviation of 30.he probability of a researcher randomly selecting an individual who...
- Q A preliminary behavioral study of the Jingdong black gibbon, a primate endemic to the Wuliang Mountains in China, found that the mean song bout duration in the wet season is...
- Q 71% of all students at a college still need to take another math class. If 38 students are randomly selected, find the probability thata. Exactly 28 of them need to...
- Q The amount of syrup that people put on their pancakes is normally distributed with mean 62 mL and standard deviation 9 mL. Suppose that 44 randomly selected people are observed...
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