Basic Math question and answers for September 12, 2024
- Q Assume that the readings at freezing on a bundle of thermometers are normally distributed with a mean of 0C and a standard deviation of 1.00C. A single thermometer is randomly...
- Q In a random sample of 12 dental assistants, the mean annual earnings was $31,721. The population is normally distributed with a standard deviation of $5260. Construct a 95% confidence interval...
- Q The population of lengths of aluminum-coated steel sheets is normally distributed with a mean of 30.05 inches and a standard deviation of .3 inches. What is the probability that the...
- Q The 1999 article about the CA lottery in the paper San Luis Obispo Tribune gave the following information on the age distribution of adults: 35% are between the ages of...
- Q GRADING ON A NORMAL CURVE-MR. SANDERSON MARKS HIS CLASS ON ANORMAL CURVE. THOSE WITH Z-SCORES ABOVE 1.8 WILL RECEIVE AN A, THOSEBETWEEN 1.8 AND 1.1 WILL RECEIVE A B, THOSE...
- Q The data in the accompanying bar graph are from a random sample of 806 adults. The graph shows four proposals to reduce gun violence in a country and the percentage...
- Q According to the National Institute on Drug Abuse, a U.S. government agency, 17.3% of 8th graders in 2010 had used marijuana at some point in their lives. A school official...
- Q If the mean, median, and mode for a given population are all equal and the relative frequency curve has matching tails to the right and left, then we would describe...
- Q Confidence interval precision: We know that narrower confidence intervals give us a more precise estimate of the true population proportion. Which of the following could we do to produce higher...
- Q In a poll, 900 adults in a region were asked about their online vs. in-store clothes shopping. One finding was that 24% of respondents never clothes-shop online. Find and interpret...
- Q A bank manager wants to know the average amount of time customers of the bank have to wait in line. The average waiting time for a sample of 35 customers...
- Q Loretta, who turns eighty this year, has just learned about blood pressure problems in the elderly and is interested in how her blood pressure compares to those of her peers....
- Q The number of potholes in any given 1 mile stretch of freeway pavement in Pennsylvania has a bell- shaped distribution. This distribution has a mean of 50 and a standard...
- Q An investor bought stock for $20,000. Fourteen years later, the stock was sold for $40,000. If interest is compounded continuously, what annual nominal rate of interest did the original $20,000...
- Q Short-term classes: Does taking a class in a short-term format (8 weeks instead of 16 weeks) increase a student's likelihood of passing the course? For a particular course, the pass...
- Q Let x represent the number of hours Trenton spends studying algebra, and let y represent the number of hours he spends studying history. For parts (a)- (e), write an inequality...
- Q Each year, Giselle plants and grows tomatoes in her backyard garden. Her plants typically produce a total of around 300 tomatoes during the season. However, each week approximately 4 tomatoes...
- Q Online photos: A poll surveyed 1802 internet users and found that 843, of them had posted a photo or video online. Can you conclude that less than half of internet...
- Q Hurricane damage: In August and September 2005, Hurricanes Katrina and Rita caused extraordinary flooding in New Orleans, Louisiana. Many homes were severely damaged or destroyed, and of those that survived,...
- Q The mean weight of male nurses working at a local hospital is less than 172 lbs. Express the null and alternative hypotheses in symbolic form for this claim.Ho: H?: Use...
- Q Use the confidence level and sample data to find the margin of error E. Round your answer to the same number of decimal places as the sample mean unless otherwise...
- Q There are over 3 million students enrolled in community colleges in the U.S. A total of 443,818 students at 699 community colleges completed the Community College Survey of Student Engagement...
- Q 1. The table shows the number of turtles hatched at a zoo each year since 2003.a. Find the line of best fit.Predict the number of turtles to be hatched in...
- Q Determine the point estimate of the population mean x? and margin of error (E) for each confident interval.Lower Bound: 15Upper Bound: 35(x)=25, E=15(x)=10, E=25(x)=25, E=10(x)=15, E=10
- Q The tread life of a particular brand of tire is a random variable best described by a normal distribution with a mean of 60,000 miles and a standard deviation of...
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