Basic Math question and answers for September 11, 2024
- Q Curing diabetes: Vertical banded gastroplasty is a surgical procedure that reduces the volume of the stomach in order to produce weight loss. In a recent study, 82 patients with Type...
- Q A psychologist would like to estimate the proportion of Americans that say "the future of the nation is a significant source of stress for me." To help form an estimate,...
- Q The correlation coefficient of a set of data is 0.91. Select all of the statements that are true. The positive correlation coefficient tells us that there is an outlier. The...
- Q b) At age 35, Alberto stops making monthly payments into his annuity, but he takes the money he accumulated in his annuity and invests it into a savings account with...
- Q Which of the following is the first step of the four essential steps in designing an observational study or experiment in statistics? Formulate a question that can be answered with...
- Q In the following hypothetical scenarios, classify each of the specified numbers as a parameter or a statistic.There are nine justices currently serving in the United States Supreme Court, and 44%...
- Q Business Weekly conducted a survey of recent graduates from the top MBA programs. On the basis of the survey, assume that 55% of the recent graduates annual salary exceeds $55000....
- Q A sample of size 7-50 is drawn from a normal population whose standard deviation is a-7.1. The sample mean is x=48.52.(a) Construct a 99.9% confidence interval for H. Round the...
- Q At General Hospital, nurses are given performance evaluations to determine eligibility for merit pay raises. The supervisor rates the nurses on a scale of 1 to 10 (10being the highest...
- Q Express the confidence interval (0.065,0.109) in the form of p-E <p<p+E.<p< (Type integers or decimals.)
- Q Company XYZ know that replacement times for the quartz time pieces it produces are normally distributed with a mean of 16.4 years and a standard deviation of 2.1 years.Find the...
- Q Quarters are currently minted with weights normally distributed and having a standard deviation of 0.062. New equipment is being tested in an attempt to improvequality by reducing variation. A simple...
- Q The lengths of a certain species of crocodiles arenormally distributed with a mean of 12.5 ft and astandard deviation of 2.1 ft.Find the probability that a randomly selectedcrocodile is more...
- Q In a pizza takeout restaurant, the following probabilitydistribution was obtained.The random variable x represents the number oftoppings for a large pizza.Find the probability that more than one toppingsis ordered.0.400.700.200.30
- Q Select the correct values of the five-number summary for the data set:15, 17, 23, 21, 19, 20, 14, 25, 15, 24Minimum: 14Minimum: 15Minimum: 131st quartile: 231st quartile: 141st quartile: 15Median:...
- Q A sample of students is selected and it is found that 25% own a computer.Choose the correct statement below.Parameter because the value is a numerical measurement describing a characteristic of...
- Q Suppose you arrive into a building and are about to take an elevator to the your floor.Once you call the elevator, it will take between 2 and 40 seconds to...
- Q Which sampling method subdivides the population into categories sharing similar characteristics and then selects a sample from each subdivision? Choose the correct answer below. Systematic Convenience Cluster Stratified
- Q Jenna drives on average 46 miles per day with a standard deviation of 5.3 miles per day. Suppose Jenna's miles driven per day are normally distributed. Let X the number...
- Q You are testing the null hypothesis p = 0.4 and will reject this hypothesis if z is less than -1.97. (Give your answers correct to four decimal places.) (a) If...
- Q In a fictional study, suppose that a psychologist is studying the effect of daily meditation on resting heart rate. The psychologist believes the patients who not meditate have a higher10...
- Q Researchers compare the body composition of cattle feeding on a grain diet with that of cattle feeding on a grass diet. This method of gathering data is classified as(1)a census.(2)a...
- Q A single strand of spaghetti should be 11 inches long. The employee in charge of the machine that cuts the spaghetti thinks the machine is producing shorter strands. She randomly...
- Q A store manager timed Janette to see how long it would take her to fold and put away a sweater, a shirt, a pair ofpants, and a scarf. It took...
- Q A pollster took a random sample of 100 students from a large university and computed a confidence interval to estimate the percentage of students who were planning to vote in...
- Q NeverReady batteries have engineered a newer, longer-lasting AAA battery. The company claims this battery has an average life span of 17 hours with a standard deviation of 0.8 hours. Your...
- Q The weight of oranges growing in an orchard is normally distributed with a mean weight of 7.5 oz. and a standard deviation of 1.5 oz. Using the empirical rule, determine...
- Q Julio reads that apples contain an average of 6 seeds. He thinks the number of seeds is greater for Granny Smith apples. He randomly samples 20 Granny Smith apples and...
- Q Noise levels at various area urban hospitals were measured in decibels. The mean of the noise levels in 88 randomly selected corridors was 81.1 decibels, and the standard deviation of...
- Q Measurements of the diameters of a random sample of 205 ball bearings made by a certain machine during one week showed a mean of 0.873 inch and a standard deviation...
- Q Suppose that you are testing the hypotheses Ho: = 19 vs. HA: > 19. A sample of size 25 results in a sample mean of 18.5 and a sample standard...
- Q 7 students took a test which was conducted by a public school. Their test scores are 85, 96, 78, 84, 97, 48, and 60. Find the median of the test...
- Q The weights, in grams, of 30 randomly selected apples from a large bin are shown below. The mean weight is 112 grams and the standard deviation is 5.5 grams. Does...
- Q You are running a business that manufactures sneakers. A women's size 9 sneaker is known to have a length of 10 inches. You are concerned that the sneakers being produced...
- Q A random sample of 212 college students was asked if they believed that places could be haunted, and 56 responded yes. Estimate the lower bound limit of the true proportion...
- Q Since 1975 the average fuel efficiency of U.S. cars and light trucks (SUVs) has increased from 13.5 to 25.8 mpg, an increase of over 90%. A random sample of 73...
- Q Yumi reads that the average maple leaf is 5.5 inches in length. She believes the maple leaves growing on the trees in her yard are longer. She randomly selects 15...
- Q You are the manager of an assembly line with machines that fill bags of trail mix. The machines are known to overfill bags 3% of the time. You think one...
- Q An aquarium reports that guests' mean visit time is 134 minutes. Benjamin, a dolphin trainer at the aquarium, believes the mean visit time is not accurate for guests who visited...
- Q The proportion of American adults who own a motorcycle is 2%. Samip believes the proportion of adults who own a motorcycle in his hometown is even lower. He randomly surveys...
- Q A group of 10 students from elementary school has their height measured. The sample mean is 136 cm and the sample standard deviation is 4.19 cm. What is the lower...
- Q A random sample of 470 students from a wide geographic area indicated that 73 attended private schools. Estimate the lower bound limit of the true proportion of students attending private...
- Q What is the probability that score pulled at random is less than 48.4?Express your answer rounded correctly to the thousandth place.Probability =
- Q A CBS News/New York Times poll found that 350 out of 796 randomly selected adults said they would travel to outer space in their lifetime, given the chance. Estimate the...
- Q An advertisement for a video game claims that 75% of people who own the game have completed the game's final quest. Avery believes that is not an accurate proportion of...
- Q The average daily volume of a computer stock in 2011 was u = 35.1 million shares, according to a reliable source. A stock analyst believes that the stock volume in...
- Q Decide if regression should be done at the alpha 0.05 level, then use that information to find the number of ice creams sold when the temp = 51F.temp (F) ...
- Q The Malones' electric bills for January through June, 2006, were $95.37, $106.51, $87.73, $83.07, $76.57, and $68.28. For these bills, determine the (a) mean and (b) median.a) The mean is...
- Q An online newspaper sent out a poll regarding the highest level of math that adults think they needed. The 90% confidence interval for a random sample of 200 people stated...
- Q You run a regression analysis on a bivariate set of data (n= 33). You obtain the regression equationy = 3.146x + - 12.726with a correlation coefficient of r = 0.847...
- Q Karlha reads that 38% of American teenagers say chocolate is their favorite flavor of ice cream. Karlha believes that a greater proportion of teenagers in Arizona say chocolate is their...
- Q A random sample of 40 students ate at a fast-food restaurant an average of 4.3 times a week with a standard deviation of 2.1. Using the table below, find the...
- Q You roll one red die and one green die. Define the random variables X be the number showing on the red die and Y be the number of dice that...
- Q You are interested in estimating the the mean age of the citizens living in your community. In order to do this, you plan on constructing a confidence interval; however, you...
- Q Oak Tree circumference and AgeCircumference (in) 26 48 46 47 55 ...
- Q Suppose a simple random sample of size n = 64 is obtained from a population that is skewed right with ?= 90 and ? = 24.(a) Describe the sampling distribution...
- Q Choose all of the statistical questions.(A) How many texts did you send today?(B) When is your birthday?(C) On average, how old are college graduates?(D) How many texts a day do...
- Q A college nursing program has select admissions to their program and only accepts 28% of applicants. Every year, a high school surveys 50 their students who applied and recorded who...
- Q A random sample of 318 students from a large college was asked if they plan to visit family during Thanksgiving break. Based on this random sample, a 99% confidence interval...
- Q A simple random sample of size n is drawn. The sample mean, x, is found to be 18.1, and the sample standard deviation, s, is found to be 4.7.(a) Construct...
- Q Find the specified nth term in the expansion of the binomial. (Write the expansion in descending powers of x.) (4x + 5y)^6 ,n=4a)160,000x^3y^3b)15x^2y^4c)240x^2y^4d)15,625y^6e)360x^2y^4
- Q A researcher surveys 220 men and 190 women and finds that 207 of the men and 171 of the women wear their seatbelts. At alpha = 0.10, is there evidence...
- Q The graph of the probability density function of a normal random variable with parameters 3 and 9 is symmetricA. with respect to the straight line r = 3B. with respect...
- Q You are interested in estimating the mean distance students travel to school. From past data, you estimate that the standard deviation of distances to be approximately 2 miles. What sample...
- Q Which one of these statements is NOT an example of a straw-man null hypotheses?(A) Families with cars have the same access to healthcare providers as families without cars.(B) Cats and...
- Q A nationwide chain of cooking schools gives all students a test at the end of training. The mean score is 89.7 with a standard deviation of 20.3. If 60 students...
- Q The effectiveness of a blood-pressure drug is being investigated. An experimenter finds that, on average, the reduction in systolic blood pressure is 26.6 for a sample of size 628 and...
- Q The price-earnings (PE) ratios of a sample of stocks have a mean value of 10.5 and a standard deviation of 1.1. Assume the PE ratios have a bell shaped distribution....
- Q The Malones' electric bills for January through June, 2006, were $95.37, $106.51, $87.73, $83.07, $76.57, and $68.28. For these bills, determine the (a) mean and (b) mediana) The mean is...
- Q Suppose a game has payoff matrix [0 -4 2] ...
- Q It is known that 259 of the 876 birds that nest in a certain park prefer worms. You believe that the proportion of brown birds that nest in a certain...
- Q You intend to estimate a population mean ? with the following sample.35.653.748.142.97.55.611.6You believe the population is normally distributed. Find the 99% confidence interval. Enter your answer as an open-interval (i.e.,...
- Q Suppose a brand of cereal claims that each box contains 7%marshmallows and 93% flakes. You believe that there are fewer than 7% marshmallows in each box. In a certain...
- Q In a survey, 17 people were asked how much they spent on their child's last birthday gift. The results were roughly bell-shaped with a mean of $47 and standard deviation...
- Q You are interested in estimating the mean weight of the local adult population of female white-tailed deer (doe). From past data, you estimate that the standard deviation of all adult...
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