Basic Math question and answers for September 07, 2024
- Q Find the standard deviation for the group of data items.6, 6, 9, 9, 9, 9The standard deviation is
- Q Find the standard deviation for the following group of data items.6, 9, 9, 15The standard deviation is approximately
- Q Under which condition is the sample proportion, P, a point estimate of the population proportion?A. The sample proportion is never a point estimate of the population proportion.B. The sample proportion...
- Q At one college, the distributions of GPA's is bell- shaped with a mean of 2.8 and a standard deviation of 0.4.According to the Empirical rule, about what percentage of students...
- Q In order to be accepted into a top university, applicants must score within the top 5% on the SAT exam. Given that the test has a mean of 1000 and...
- Q The heights of adult men in America are normally distributed, with a mean of 69.3 inches and a standard deviation of 2.63 inches. The heights of adult women in America...
- Q The number of cartoons watched by Mrs. Kelly's first grade class on Saturday morning is shown below:X P(x)0 0.151 0.202 0.303 0.104 0.205 0.05Find the probability that a student watches...
- Q The population of rabbits on an island is growing exponentially. In the year 2001, the population of rabbits was 2400, and by 2004 the population had grown to 2900. Predict...
- Q 6 calculate how much you can borrow with a $800 per month payment at today's mortgage rates and determine if it would be enough money to purchase the home you...
- Q A sample of 14 squirrels were found to have an average weight of 9.8 ounceswith a sample standard deviation is 0.30.Use this data to find the 95% confidence interval of...
- Q A tire company tested a particular model of super radial tire and found the tires to be normally distributed with respect to wear. The "average" (mean) tire wore out at...
- Q Suppose you and your brother each invest $5000 in a bank account. Both banks offer 6.5% annual interest. However, your brother's account is compounded annually, while yours is compounded monthly....
- Q A report states that 42% of home owners had a vegetable garden. How large a sample is needed to estimate the true proportion of home owners who have vegetable gardens...
- Q An insurance company will insure a $220,000 home for its total value for an annual premium of$510.The company spends $30 per year to service such a policy, and the probability...
- Q A random sample of 16 light bulbs has a mean life of 650 hours and a standard deviation of 32 hours. Assume the population has a normal distribution. Construct a...
- Q The pulse rates of 174 randomly selected adult males vary from a low of 35 bpm to a high of 115 bpm. Find the minimum sample size required to estimate...
- Q Compute the ordinary interest, the exact interest, and their difference. Round answers to the nearest cent.Ordinary ExactPrincipal, Rate, and Time Interest Interest Difference$3,650 at 8% for 75 days$294.10, $292.00, $2.10$73.00,...
- Q Find the critical value z necessary to form a confidence interval at the level of confidence shown below.c=0.83Z0=0
- Q Joanna set a goal to drink more water daily. The number of ounces of water she drank each of the last seven days is shown below.60, 58, 64, 64, 68,...
- Q Let Z be a standard normal random variable. Calculate the following probabilities using the ALEKS calculator. Round your responses to at least three decimal places.(a) P(Z > -1.25) =(b) P(Z...
- Q If a simple random sample is taken, and a 90% confidence interval of 1.53 <o<2.08 is constructed from the sample statistic, s, the following is the correctinterpretation: "We are 90...
- Q The mean SAT score in mathematics is 519. The founders of a nationwide SAT preparation course claim that graduates of the course score higher, on average, than the national mean....
- Q The half-life of gold-194 is approximately 1.6 days.How much of a 15 gram sample of gold-194 would remain after 4 days? Round to three decimal places.
- Q Thunderstorm Speeds A meteorologist who sampled 11 thunderstorms found that the average speed at which they traveled across a certain state was 13 miles per hour. The standard deviation of...
- Q High Cholesterol: A group of eight individuals with high cholesterol levels were given a new drug that was designed to lower cholesterol levels. Cholesterol levels, in milligrams per deciliter, were...
- Q Your credit card has a balance of $1,200. Its interest rate is 20.5%. You have stopped using the card, because you don't want to go any deeper into debt. Each...
- Q For one week (five days) a student tracked their waiting time for parking at the college. The wait timeswhere: 14, 11, 12, 13, and 23 minutes.Calculate the mean and median...
- Q Number of Jobs A sociologist found that in a sample of 50 retired men, the average number of jobs they had during their lifetimes was 7.3. The population standard deviation...
- Q Consider the case of a male student who has three beers and weighs 120 pounds. Simplify the Widmark equation as much as possible for this case, rounding any constants to...
- Q The activity on Marny Zell's MasterCard account for one billing period is shown below. Find the average daily balance and the finance charge if the billing period is June 26...
- Q Use the given degree of confidence and sample data to construct a confidence interval for the population mean ?. Assume that the population has a normal distribution.n = 30, x...
- Q Your grade point average (GPA) is a form of a weighted average. That is, 4 units of A counts more than 4 units of B. The most common weight for...
- Q A simple random sample is taken from a population and yields the following data for a variable of the population.9 34 38 37 1924 11 19 21 32Find a point...
- Q A recent study of 400 patients found that of 95 alcoholic patients, 79 had elevated cholesterol levels, and of 305 nonalcoholic patients, 70 had elevated cholesterol levels. If a patient...
- Q Job Elimination In the past year, 15% of businesses have eliminated jobs. If 3 businesses are selected at random, find the probability that at least 1 has eliminated jobs during...
- Q For an outdoor concert by the city orchestra, concert organizers estimate that 10,000 people will attend if it is not raining. If it is raining, concert organizers estimatethat 3000people will...
- Q Suppose Exam 1 has a normal distribution with mean = 78 andstandard deviation = 14.9. Select one student at random,a. find the probability that the student got at least 90...
- Q A farmer is growing a type of apple with a known meanweight of 0.3 lbs. and a standard deviation of 0.05 lbs.After looking through his orchard, he believes his applesmight...
- Q Kari is purchasing a home for $260,000. The down payment is 25% and the balance will be financed with a 15 year mortgage at 8% and 4 discount points. Kari...
- Q A baseball supply store has many inexpensive baseball gloves. In fact, over half of the gloves in stock cost less than $50. However, there are also a few high-end, more...
- Q The amount of water consumed each week by Montana residences is normally distributed. A simple random sample of 25 residences was taken with a sample mean of 120.3 gallons and...
- Q Thirty-nine different video games showing violence were observed. The duration times of violence (in seconds) were recorded. When using this sample for a t test of the claim that the...
- Q Assume that a sample is used to estimate a population mean ?. Use the given confidence level and sample data to find the margin of error. Assume that thesample is...
- Q Suppose Robbie is the educational director for a group of teen testprep programs in Nevada. He knows that the mean score on Nevada'smathematics exam is 114 points with a standard...
- Q The number of breakfast drive thru customers per day is normally distributed with a mean of 44 and a standard deviation of 6.A. What precent of days have between 38...
- Q Some species of eagles have been fighting extinction due to environmental hazards such as DDT, PCBS, and dioxin. The problem is with the food chain. Fish or rodents consume contaminated...
- Q Your alpha level is 0.05. The probability of observing two sample means that you have gathered if the means of the population are the same is 0.04. Which statement below...
- Q Assume SAT Math scores are normally distributed with a mean of 500 and standard deviation of 100. A) Find the probability that a student scores lower than 575 B) Find...
- Q From recent survey data, its known that the proportion of adults in the United States who are smokers is 18%. For a random sample of size 150, what is the...
- Q A random number generator picks a number from 13 to 38 in a uniform manner. Round answers to 4 decimal places when possible.a. The mean of this distribution isb. The...
- Q The time that it takes for the next train to come follows a Uniform distribution with f(x) =1/30 where x goes between 4 and 34 minutes. Round answers to 4...
- Q The round off errors when measuring the distance that a long jumper has jumped is uniformly distributed between 0 and 5.6 mm. Round values to 4 decimal places when possible.a....
- Q Fill in the blanks to correctly complete the sentence below. Suppose a simple random sample of size n is drawn from a large population with mean ? and standard deviation...
- Q Suppose that the weight of an newborn fawn is Uniformly distributed between 1.5 and 3.6 kg. Suppose that a newborn fawn is randomly selected. Round answers to 4 decimal places...
- Q X' is a normally distributed random variable with a mean of 7.0 and a standard deviation of 3.00. Find the value x such that P(X<x) is equal to 0.86. (Note:...
- Q Assuming the population has a bell-shaped distribution, if a sample size n = 19 has a sample mean x? = 33 with a sample standard deviation s = 7, find...
- Q Assuming the population has a bell-shaped distribution, if a sample size n 12 has a sample mean x= 35 with a sample standard deviation s = 7, find the margin...
- Q Suppose that in a large population of students, the mean amount of sleep the previous night was ? = 6.9 hours and the standard deviation was ? = 1.55 hours....
- Q We want to obtain a sample to estimate a population mean. Based on previous evidence, researchers believe the population standard deviation is approximately ? = 1.3. We would like to...
- Q Which of the following is NOT involved in the process of interpreting pictures?Determine what type of picture it is.Form an opinion on the quality of work.Analyze the author's intentions.Observe the...
- Q The average height of young adult males has a normal distribution with standard deviation of 2.4 inches. You want to estimate the mean height of students at your college or...
- Q Among various ethnic groups, the standard deviation of heights is known to be approximately three inches. We wish to construct a 95% confidence interval for the mean height of male...
- Q If the average price of a television in my store is $900 with stock is morally a standard deviation of $50. Assuming my distributed where is:A. 68% of the computers...
- Q The offensive line of a football team is larger than in previous years. The program will list a statistic to show this fact. Which statistic (mean, median, or mode) might...
- Q Rabies is an often-fatal disease, which is typically transmitted through the bite of an infected animal. The state of Florida has been recording all known cases of rabies for the...
- Q A reporter is doing a story on the falling prices of homes in a large neighborhood. The reporter wants to demonstrate how the prices have fallen for all homes, not...
- Q Tables in the dining hall are numbered 1-12 for students who eat there. The principal calls out a number for the table that will go through the buffet line first....
- Q A sports psychologist tests a new coaching method and finds that of the 43 novice athletes who were trained under the new method, they only froze/choked when in high stakes...
- Q For a particular diamond mine, 76% of the diamonds fail to qualify as "gemstone grade". A random sample of 108 diamonds is analyzed. Find the standard deviation.0.0410.960.240.76
- Q The unit cost, in dollars, to produce tubs of ice cream is $3 and the fixed cost is $8918. The price-demand function, in dollars per tub, is p(x) = 283...
- Q Engineers must consider the diameters of heads when designing helmets. The company researchershave determined that the population of potential clientele have head diameters that are normallydistributed with a mean of...
- Q Find the area under the standard normal curve within three standard deviations of the mean. Round thesolution to four decimal places, if necessary.
- Q What percentage of the general U.S. population are high-school dropouts? The Statistical Abstract of the United States, 120th Edition, gives the percentage of high- school dropouts by state. For convenience,...
- Q The residents of a city voted on whether to raise property taxes. The ratio of yes votes to no votes was 4 to 5. If there were 6417 total votes,...
- Q College students average 7.1 hours of sleep per night with a standard deviation of 45 minutes. If the amount of sleep is normally distributed, what proportion of college students sleep...
Get Answers to Unlimited Questions
Join us to gain access to millions of questions and expert answers. Enjoy exclusive benefits tailored just for you!
Membership Benefits:
- Unlimited Question Access with detailed Answers
- Zin AI - 3 Million Words
- 10 Dall-E 3 Images
- 20 Plot Generations
- Conversation with Dialogue Memory
- No Ads, Ever!
- Access to Our Best AI Platform: Flex AI - Your personal assistant for all your inquiries!