Basic Math question and answers for September 12, 2024
- Q The Central Limit Theorem states that means will be normally distributed, even if the population isn't, if you take a sample size greater than or equal to 100304010
- Q The symbol p, (phat) stands forConfidence IntervalSample ProportionPopulation ProportionZ score
- Q A ball thrown in the air has a height of h (t) = -16t2 + 40t + 5 feet after t seconds.What is the average rate of change for h(t)...
- Q What critical value of z or z* should be used in an 85% confidence interval?1.6451.2821.9601.440
- Q On Monday, Ms. Liu asked the students how many Harry Potter books they have read in the last month and recorded the information in a dot plot. On Tuesday a...
- Q Use the following scenario for questions 1-4. Suppose it is estimated that 14% of American women are currently on a diet. A researcher would like to test this claim, so...
- Q A population of values has an unknown distribution with = 202.4 and ? = 11.5. You intend to draw a random sample of size n=144.What is the mean of the...
- Q A particular brand of tires claims that its deluxe tire averages at least 50,000 miles before it needs to be replaced. From past studies of this tire, the standard deviation...
- Q Pamela sets aside $100 per month during her 40 year career. She invests in the US stock market through an index fund that in 40 years. averages a 7% return...
- Q The population of a town t years after the beginning of the year 2000 is given byP(t)= 6020 e 0.025t. Find the AVERAGE population of the town from the beginning...
- Q Current Attempt in Progress Lazurus Steel Corporation produces iron rods that are supposed to be 36 inches long. The machine that makes these rods does not produce each rod exactly...
- Q The mean consumption of water per household in a city was 1215 cubic feet per month. Due to a water shortage because of a drought, the city council campaigned for...
- Q Which of the following is NOT a property of the t distribution?A) It is symmetric.B Its exact shape (i.e., spread) is characterized by the degrees of freedom.C) All of the...
- Q A professor sampled 46 students from a large university to obtain a 95% confidence interval for the proportion of students in favor of raising ASB fees. The interval was (.356,...
- Q A random sample of state gasoline taxes (in cents) is shown here for 12 states. Use the data to estimate the lower bound of the true population mean gasoline tax...
- Q Which of the following statements is false?A Alpha is the proportion in the tails of the distribution which are outside of the confidence interval.B) There is a different z-value (i.e.,...
- Q In a survey of 1000 U.S. adults, 700 think police officers should berequired to wear body cameras while on duty. Construct 99% confidenceinterval for the population proportion.
- Q A nutritionist found that in a random sample of 59 families, 21% indicated that they ate fruit at least 3 times a week. Find the lower bound limit of the...
- Q A factory manufactures a chip used in constructing central processing units for computers. The factory's quality control division has set a limit that no more than 2% of the chips...
- Q Red Blood Cell Count A simple random sample of 40 adults males is obtained, and the red blood cell count (in cells per microliter) is measured for each of them,...
- Q A recent study of 25 randomly selected employees of a company showed that the mean of the distance they traveled to work was 14.71 miles. The standard deviation of the...
- Q Frederick is creating a plan to conduct a randomized survey. He will be asking guests at a baseball stadium to rate their experience. At which location should he take the...
- Q 6. BMI for Miss America A claimed trend of thinnerMiss America winners has generated charges that thecontest encourages unhealthy diet habits among youngwomen. Listed below are body mass indexes (BMI)...
- Q A group of 625 students has a mean age of 15.8 years with a standard deviation of 0.6 years. The ages are normally distributed. What is the probability that a...
- Q Each bag of different colored jelly beans is supposed to have 30% blue jelly beans. Ramon believes there are actually a greater proportion of blue jelly beans. He randomly selects...
- Q Sylvia makes pizzas at an Italian restaurant. A large pizza is listed on the menu as being 16 inches. Sylvia wants to know how accurate she is at throwing dough...
- Q Consider a population with u-58.5 and o-5.7 is taken. Find the standard deviation of the sampling distribution of the samplemeans with a sample size of 76.
- Q A bus company is doing research to determine if it can save money by switching from gasoline-powered buses to electric-powered buses. The company randomly selects records of gasoline usage from...
- Q A poll of 1146 U.S. adults found that 972 U.S. adults,or 84.817% regularly used Facebook as a newssource.Find the margin of error and confidence interval forthe percentage of U.S. adults...
- Q According to an insurance company, theprobability that a woman will survive oneyear is0.992, and the probability that she will diein one year is 0.008. If she buys a $10,000one-year term...
- Q The following is a list of 12 measurements.35, -24, -7, -1, -93, 49, 15, 40, 29, 46, 92, 3Suppose that these 12 measurements are respectively labeled x?, x?, ..., x?2....
- Q You work for a marketing firm that has a large clientin the automobile industry. You have been asked toestimate the proportion of households in Chicagothat have two or more vehicles....
- Q Last year it was recorded that among the 2,896 students in the school district, 1,325 have visited the school nurse. You believe that the proportion of students who visited the...
- Q Fill in the blanks in the statement below.The__represents the expected proportion of intervals that will contain the parameter if a large number of different samples of size n is obtained....
- Q The recommended number of hours of sleep per night is 8 hours, but everybody "knows" that the average college student sleeps less than 7 hours. The number of hours slept...
- Q The owner of a local chain of grocery stores is always trying to minimize the time it takes her customers to check out. In the past, she has conducted many...
- Q If the claim of researchers is that the mean score is more than 92, what would be the correct alternate hypothesis for it?Mean score is less than 92.Mean score is...
- Q (a) What is the probability that a randomly selected pregnancy lasts less than 258 days?The probability that a randomly selected pregnancy lasts less than 258 days is approximately 0.3085.(Round to...
- Q a. Find the critical value(s).Select the correct choice below and fill in the answer box(es) within your choice.(Round to two decimal places as needed.)A. There are two critical values; the...
- Q Another baseball team had a batting average of 0.290 with a standard deviation of 0.04. What is the probability that aplayer on that team had a batting average between 0.330...
- Q A baseball team had a batting average of 0.245 with a standard deviation of 0.02. What is the probability that a player had a batting average between 0.245 and 0.305?...
- Q In a mid-size company, the distribution of thenumber of phone calls answered each day by each ofthe 12 receptionists is bell-shaped and has a mean of38 and a standard deviation...
- Q The function f(x) is continuous over the interval [?2, 5] and has a critical point at x = 1. If f" is negative on thisinterval, which of the following is...
- Q In the upcoming election for governor, the most recent poll, based on 900 respondents, predicts that the incumbent will be reelected with 55 percent of the votes. For the sake...
- Q In a recent year, the Better Business Bureau settled 75% of complaints they received. (Source: USA Today, March 2, 2009) You have been hired by the Bureau to investigate complaints...
- Q What is one potential problem with this simulation?In order to run this simulation you would need to plot the data in a sampling distribution to see where the average shoe...
- Q Use the table of critical values of the Pearson correlation coefficient to determine whether the correlation coefficient is statistically significant at thespecified level of significance for the given sample size....
- Q USE THE NORMAL CURVE TABLE TO DETERMINE THE PERCENT OF DATA SPECIFIED.A) BETWEEN z = -1.34 AND z = 2.24B) GREATER THAN z = -1.90C) TO THE RIGHT OF 1.78D)...
- Q A statistician uses Chebyshev's Theorem to estimate that at least 65 % of a population lies between the values 1 and 17. Use this information to find the values of...
- Q Scores on a standardized test are normally distributed, perfectly symmetric and mound shaped, with a mean of 100 and a standard deviation of 20. If these scores are converted to...
- Q Write the hypothesis.1) A recent study claimed that more than 15% of junior high students are overweight. In a sample of 160 students,18 were found to be overweight. At a...
- Q APPLICANCE WARRANTY-THE WARRANTY ON THE MOTOR OF A DISHWASHER IS8 YEARS. IF THE BREAKDOWN TIMES OF THIS MOTOR ARE NORMALLY DISTRIBUTED, WITH A MEAN OF 10.2 YEARS AND A STANDARD...
- Q Body Mass Index: In a survey of adults with diabetes, the average body mass index (BMI) in a sample of0.3. The average BMI in a sample of 1559men was 30.50...
- Q 7.40 Testing a random number generator. Statistical software has a "random numbergenerator" that is supposed to produce numbers uniformly distributed between 0 and1. If this is true, the numbers generated...
- Q For a data set of the pulse rates for a sample of adult females, the lowest pulse rate is 38 beats per minute, the mean of the listed pulse rates...
- Q Furnace repair bills are normally distributed with a mean of 269 dollars and a standard deviation of 20 dollars. If 64 of these repair bills are randomly selected, find theprobability...
- Q Consider a population of size N = 9, 800 with a mean of ? = 161 and standard deviation of a = 17. Compute the following z-values for either the...
- Q A student at a junior college conducted a survey of 20 randomly selected full-time students to determine the relation between the number of hours of video game playing each week,...
- Q A town that had 4000 people at the beginning of the year 2000 has been decreasing by 3.1% per year.(a) What is the 1-year percent change in the city's population?(b)...
- Q 23, 20, 24, 19, 27, 20, 31 What is the mode? B. 31 D. 27 A. 20 C. 23.4
- Q Samples of size n = 900 are randomly selected from the population of numbers (O through 9) produced by a random-number generator, and the proportion of numbers 2 5 is...
- Q Given a sample size n, how will the distribution of the sample mean behave?unable to discern from this informationlike the original distributionlike the normal distributionlike the uniform distribution
- Q Samples of size n = 90 are randomly selected from the population of numbers (0 through 9) produced by a random-number generator, and the variance is found for each sample....
- Q You owe $190 on your credit card. The minimum payment is $20.00 and the interest rate on the credit card is 1.8%. What is the interest charged?
- Q Scientists researching crickets have observed that the rate at which a certain species chirps may be related to their surrounding temperature. The table below contains chirping rates of crickets for...
- Q The data below shows the height of a Ferris wheel at different pointsin time.x (time in m) 0 3 6...
- Q A population of values has a normal distribution with ?=152.1 and ?= 6.7. You intend to draw a random sample of size n = 25.First calculate z, round it to...
- Q The use of a tremendously large sample does not solve the question of quality for an estimator. What problems do you anticipate with very large samples? (Select all that apincrease...
- Q In a study of the cost of speeding tickets across the nation, the cost is reported to be Normally distributed with a mean of $152. A local newspaper believes that...
- Q Using a calculator or statistical software, find the linear regression line for the data in the table below. Enter your answer in the form y = mx +b, with m...
- Q The manager of a DVD rental store analyzed the number of DVD rentals (y) to the number of weeks the DVD had been available (x) and found a strong negative...
- Q If 15% of adults in a certain country work from home what is the probability that fewer than 30 out of a random sample of 250 adults will work from...
- Q A researcher studying public opinion of proposed Social Security changes obtains a simple random sample of 50 adult Americans and asks them whether or not theysupport the proposed changes. To...
- Q A student satisfaction survey was completed with respect to the middle schoolcafeteria. Two methods were discussed. Decide which method is better and why.Method A: A survey of 65 students randomly...
- Q In a large city, a transportation engineer wants to estimate the proportion of residents who use the bus system regularly. Out of a random sample of 2000 residents, 1220 use...
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!