Basic Math question and answers for September 02, 2024
- Q Find the probability using the normal distribution: P(-1.36 <z<0). UseP(-1.36 <z< 0) =XThe Standard Normal Distribution Table and enter the answer to 4 decimal places.8EK
- Q Suppose the standard deviation of the weights of all Florida manatees is 24 pounds. Let x be the meanweight for a sample of a certain number of Florida manatees. What...
- Q Determine the total area under the standard normal curve in parts (a) through (c) below.(a) Find the area under the normal curve to the left of z= -1 plus the...
- Q A simple random sample of 16 bicycle helmets had a mean price of x-$38.12. It is reasonable to assume that the population of helmet prices is approximatelynormal with population standard...
- Q (a) If $4,500 is invested at 1.55% interest, find the value (in dollars) of the investment at the end of 4 years if the interest is compounded as follows. (Round...
- Q X follows a Binomial probability distribution with parameters n= ___ and p = ___Complete the notation:X ~ ___ (___.___)
- Q Determine the effective annual yield for each investment. Then select the better investment. Assume 360 days in a year.12.5% compounded monthly; 12.75% compounded annually
- Q A leading magazine (like Barron's) reported at one time that the average number of weeks an individual is unemployed is 30 weeks. Assume that for the population of all unemployed...
- Q Nimesh is creating a new app for real estate developers to estimate the number of nightclubs in a city. To do this, he samples a number of cities to measure...
- Q A set of data has a normal distribution with a mean of 47 and a standard deviation of 8. Find the percent of data within the following interval. from 39...
- Q You are conducting a study to see if the proportion of voters who prefer Candidate A is significantly less than 0.72. You use a significance level of a = 0.01.Ho:...
- Q If a vertical line is drawn through a normal distribution at each of the following z-score locations, then determine whether the tail is on the left side or the right...
- Q Find the minimum, first quartile, median, third quartile, and maximum of the data set below.4.6 3.2 6.4 5.2 5 4.9 6.2 3.8 12.4The minimum is. (Type an integer or a...
- Q Sarah will collect data to find out where the local Scout troops want to hold their end-of-the-year picnic. Which group should Sarah survey to collect the most accurate result?The first...
- Q Suppose your statistics professor reports test grades as z-scores, and you got a score of 2.50 on an exam.a) Write a sentence explaining what that means.b) Your friend got a...
- Q People with z-scores of 2.5 or above on a certain aptitude test are sometimes classified as geniuses. If aptitude test scores have a mean of 100 and a standard deviation...
- Q Students in a class were asked how many pets they had at home. Their answers are given below.0, 0, 0, 0, 2, 2, 2, 2, 3, 3, 4, 5, 6,...
- Q Type I error occurs whennull hypothesis is not correct, but we accept itnull hypothesis is not correct, and we reject itnull hypothesis is correct, and we accept itnull hypothesis is...
- Q The trade magazine QSR routinely checks the drive-through service times of fast-food restaurants. An 80% confidence interval that results from examining 580 customers in Taco Bell's drive-through has a lower...
- Q List five properties of the F-distribution. The F-distribution is a family of curves, each of which is determined by two types of degrees of freedom: the degrees of freedom corresponding...
- Q Team A and B love to play pickup basketball. There are no fouls and no three-pointers, so all shots are worth 2 points.The only problem is Team A always wins....
- Q The manager of a movie theater analyzed her popcorn sales (x) and beverage sales (y) and found a weak positive correlation. What does this mean?O As the number of bags...
- Q 3) Jack has $400 and is going to start saving $30 per week. Sally has $225 and is going to start saving $55 per week. How many weeks will it...
- Q The amounts of electricity bills for all households in a city have a skewed probability distribution with a mean of $137 and a standarddeviation of $30. Find the probability that...
- Q A five digit number (having all different digits) is formed using the digits 1, 2, 3, 4, 5, 6, 7, 8 and 9. The probability that the formed number either...
- Q Identify the explanatory variable and the response variable.A teacher wants to determine if the teaching method used by her students can be used to predict the students' test scores.The explanatory...
- Q Last year's report found that of the 30,215 students at a college, 8,913 had not taken a foreign language. A researcher believes this proportion has decreased this year and decides...
- Q A certain experiment produces the data (3,7.6), (4,5.6), and (5,-0.5). Describe the model that produces a least-squares fit of these points by a function of the formy= A cos x...
- Q Let p be the probability measure on S3 given by p(?) = 1/6, p((12)) = 1/6, p((13)) = 2/9, p((23)) = 1/9, p((123)) = 2/9, p((132)) = 1/9. Show that...
- Q The table shows the number of goals allowed and the total points earned (2 points for a win, and 1 point for an overtime or shootout loss) by 14 ice...
- Q Suppose that the mean cranial capacity for men is 1120 cc (cubic centimeters) and that the standard deviation is 300 cc. Assuming that men's cranial capacities are normally distributed, complete...
- Q A biologist is studying rainbow trout that live in a certain river and she estimates their mean length to be 526 millimeters. Assume that the lengths of these rainbow trout...
- Q According to a recent poll, 26% of adults in a certain area have high levels of cholesterol. They report that such elevated levels "could be financially devastating to the regions...
- Q Farmers sell milk by the hundredweight (100 pounds of milk). At one time the mean price was $16.30 per hundredweight with a standard deviation of 2.01. What is the probability...
- Q Donna De Paul is raising money for the homeless. She discovers that each church group requires 2 hours of letter writing and 1 hour of follow-up, while for each labor...
- Q Suppose the true proportion of voters in the county who support a restaurant tax is 0.44. Consider the sampling distribution for the proportion of supporters with sample size n =...
- Q Use the Corporate Income Tax information above to answer this question. A corporation has a taxable income of $7,857,693. At this income level, the federal income rate is 47%, the...
- Q In a certain animal species, the probability that a healthy adult female will have no offspring in a given year is 0.30, while the probabilities of 1, 2, 3, or...
- Q An avocado grower wants to plot the weights of the avocados his farm produced this season. He thought about using a box plot, but he ultimately chose to use a...
- Q Robert, a rookie statistician, decides he wants to practice the methods he learned for performing a proportion z-test in order to determine if the average height of children at a...
- Q The management of a supermarket wants to adopt a new promotional policy of giving a free gift to every customer who spends more than a certain amount per visit at...
- Q A teacher is interested in knowing the average score of his class. He has an idea that the mean score of his subject for the past two years has been...
- Q The scores of students on a college entrance exam were normally distributed with a mean of 19.4 and a standard deviation of 6.3. a. If a sample of 70 students...
- Q The average American eats 1.5 cups of vegetables a day (may not be accurate). A researcher is interested in whether teenagers eat less vegetables on average than does the average...
- Q The following data are the shoe sizes of some male students. The sizes are discrete data since shoe size is measured in whole and half units only.Dataset:9; 9; 9.5; 9.5;...
- Q The Lites-Are-Us company advertises that its average light bulbs last 365 days. They want to include a guarantee that a lightbulb will last between 255 and 475 days. Suppose the...
- Q The standard deviation of a probability distribution is 85, and using the 68-95-99.7 rule, about 68% of thevalues lie between 540 and 710. What is the mean of this distribution?625455795795
- Q Researchers examined the mechanical properties of webs spun by the orb spider, Nephelia edulis. A table in their published report gives summary statistics for a number of variables in the...
- Q The weights of a group of first-graders at a local elementary school were normally distributed. The mean was 70 pounds and the standard deviation was 3 pounds. What is the...
- Q Suppose that a sample of 800 adults in California revealed that 652 of them have had at least one dose of a Covid-19 vaccine. Test the claim that more than...
- Q Suppose you want to conduct a survey of benefit packages available in private businesses in the Research Triangle. You want a sample size of 100. Identify the sampling method.Assign each...
- Q Consider the following. (Give your answers correct to two decimal places.)(a) Find the standard score (z) such that the area below the mean and above z under the normal curve...
- Q Which of the following questions is not a statistical question? On average, how many people brought their lunch to school today? What is the average age for students at your...
- Q 28% of all Boone students believe Monday will be a snow day. You take a sample of 50 students and find that 15 of them believe Monday will be a...
- Q A magazine provided results from a poll of 2000 adults who were asked to identify their favorite pie. Among the 2000 respondents, 11% chose chocolate pie, and the margin of...
- Q The grades on the second statistics test for Mrs. Sweeney's class are in the following list. Complete the frequency distribution table for the grades.F, A, F, D, F, D, B,...
- Q Suppose that the heart beat per minute (bpm) of adult males has a normal distribution with a mean of ?=68 1 bpm and a standard deviation of ? = 11.6...
- Q An elevator has a placard stating that the maximum capacity is 4100 lb-27 passengers. So, 27 adult male passengers can have a mean weight of up to 4100/27=152 pounds. Assume...
- Q The probability that it will snow on January 10 is 0.25. What is the probability that it will snow on January 10 three years in a row?0.0160.2500.7500.062
- Q A student downloaded a new game on her phone that was recommended by her friend. She wanted to show her friend how good she was doing, so she wrote down...
- Q In a random sample of size 100 taken from a population of size 1,000, the mean and s.d. of a sample characteristic are found to be 4.8 and 1.1 respectively....
- Q Choose the correct words to fill in the blanks below.relativehistogrampolygonogive1. A ... is a type of bar graph that visually presents the information contained in frequency distribution tables.2. The fraction...
- Q In a recent survey, 65% of those surveyed were in favor of a local school levy. The margin of errorwas 2%. How many people were surveyed?Hint: Use the Margin of...
- Q A company who manufactures hearing aids has a goal of having no more than 10 defective hearing aids per shipment. A company executive sampled 32 shipments and found an average...
- Q Two car brands have a friendly competition over the longevity of their cars.A sample of 16 cars from company A stays on the road an average of 13.1years with a...
- Q Suppose that the populations of Mexico and India both increase by 11 million people inone year. What would be the relative change for each country? Answer to the nearesttenth of...
- Q Sarah Meeham blends coffee for Tasti-Delight. She needs to prepare 150 pounds of blended coffee beans selling for $4.17 per pound. She plans to do this by blending together a...
- Q A survey of 1,700 licensed drivers revealed that 33% have received at least 1 speeding ticket in the last 2 years. Construct a 99% confidence interval for the population mean...
- Q In the US, 44% of households subscribe to a cable service. Assume that 200 homes are randomly surveyed. Let x the number that subscribe to a cable service. Assume that...
- Q A student creates a survey to see how many computers households own in a specific neighborhood. Of 500 responses, 54 households own no computers, 129 households own one computer, 97...
- Q A food processing plant fills snack-sized bags of crackers. The hean number of crackers in each bag is 22 and the standard deviation is 2. The factory supervisor selects one...
- Q Use the data below to answer the following question.x (time in m) 0 3 6 9 12y (height 10 in m) 10 15 19 26 30y=9.8x+1.7y=1.7x+9.8y=-1.2x+10y=-10x+1.2Calculate a linear regression model...
- Q A company that manufactures paddle boards has a fixed cost of $21,000. It costs $100 to produce each paddle board. The selling price is $250 per paddle board. 1. Write...
- Q A rare form of malignant tumor occurs in 11 children in a million, so its probability is 0.000011. Four cases of this tumor occurred in a certain town, which had...
- Q A bacteria culture initially contains 100 cells and grows at a rate proportional to its size. After an hour the population has increased to 420.(a) Find an expression for the...
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!