Basic Math question and answers for September 10, 2024
- Q Heavy children: Are children heavier now than they were in the past? The National Health and Nutrition Examination Survey(NHANES) taken between 1999 and 2002 reported that the mean weight of...
- Q Assume that X has a normal distribution, and find the indicated probability.The mean is ? = 60.0 and the standard deviation is o = 4.0.Find the probability that X is...
- Q Is there a doctor in the house? A market research firm reported the mean annual earnings of all family practitioners in theUnited States was $178,258. A random sample of 43...
- Q Efficient manufacturing: Efficiency experts study the processes used to manufacture items in order to make them as efficient aspossible. One of the steps used to manufacture a metal clamp involves...
- Q Find the P-value for the indicated hypothesis test.A random sample of 139 forty-year-old men contains 26% smokers. Find the P-valuefor a test to reject the claim that the percentage of...
- Q Find the P-value for the indicated hypothesis test. Round all proportions andstandard scores to two decimal places.In a sample of 47 adults selected randomly from one town, it is found...
- Q Find the critical value(s) and rejection region(s) for the indicated t-test, level of significance a, and sample size n.vTwo-tailed test, a= 0.01, n = 13Click the icon to view the...
- Q How's the economy? A pollster wants to construct a 99% confidence interval for the proportion of adults who believe thateconomic conditions are getting better.Part: 0 / 2Part 1 of 2(a)...
- Q Construct the indicated confidence interval for the difference between population proportions P1.P2. Assume that the samples are independent and that they have been randomly selected. In a random sample of...
- Q Suppose that replacement times for washing machines are normally distributed witha mean of 9.3 years and a standard deviation of 1.1 years. Find the probability that 70randomly selected washing machines...
- Q Use the given information to find the P-value. Also, use a 0.05 significance level andstate the conclusion about the null hypothesis (reject the null hypothesis or fail toreject the null...
- Q SAT scores: A college admissions officer takes a simple random sample of 100 entering freshmen and computes their meanmathematics SAT score to be 446. Assume the population standard deviation is...
- Q Your medical research team is investigating the mean cost of a 30-day supply of a certain heart medication. A pharmaceutical company thinks that the mean cost is more than $91....
- Q Use the given information to find the minimum sample size required to estimate anunknown population mean ?. How many commuters must be randomly selected to estimate the mean driving time...
- Q A final exam in Math 160 has a mean of 73 with standard deviation 7.8. If 24students are randomly selected, find the probability that the mean of their testscores is...
- Q Assume that a sample is used to estimate a population proportion p. Find themargin of error E that corresponds to the given statistics and confidence level.Round the margin of error...
- Q A population has a mean = 78 and a standard deviation ? =27. Find the mean and standard deviation of a sampling distribution of sample means with sample size n=...
- Q Intelligence quotients (IQs) on the Stanford-Binet intelligence test are normally distributed with a mean of 100 and a standard deviation of 16. Use the 68-95-99.7 Rule to find the percentage...
- Q The mean annual tuition and fees for a sample of 10 private colleges was $36,000 with a standard deviation of $4900 A dotplot shows that it is reasonable to assume...
- Q In a random sample of six people, the mean driving distance to work was 24.1 miles and the standard deviation was 7.5 miles. Assuming the population is normally distributed and...
- Q In a random sample of eight cell phones, the mean full retail price was $449.00 and the standard deviation was $225.00. Assume the population is normally distributed and use the...
- Q Use the standard normal distribution or the t-distribution to construct a 90% confidence interval for the population mean. Justify your decision. If neither distribution can be used, explain why. Interpret...
- Q The weight of an organ in adult males has a bell-shaped distribution with a mean of 350 grams and a standard deviation of 45 grams. Use the empirical rule todetermine...
- Q Use the confidence interval to find the estimated margin of error. Then find the sample mean.A biologist reports a confidence interval of (3.5,4.3) when estimating the mean height (in centimeters)...
- Q In a random sample of 8 people, the mean commute time to work was 36.5 minutes and the standard deviation was 7.2 minutes. A 98% confidenceinterval using the t-distribution was...
- Q Use the confidence interval to find the margin of error and the sample mean.(1.62,1.96)The margin of error is 0.17.(Round to two decimal places as needed.)The sample mean is..
- Q A nutritionist claims that the mean tuna consumption by a person is 3.2 pounds per year. A sample of 90 people shows that the mean tuna consumption by a person...
- Q Find the critical value ze necessary to form a confidence interval at the level of confidence shown below.c=0.86Zc =
- Q Find the critical value(s) and rejection region(s) for the indicated t-test, level of significance a, and sample size n.Two-tailed test, a=0.02, n=17
- Q Find the minimum sample size n needed to estimate for the given values of c, ?, and E.c=0.95, ?=6.4, and E= 2Assume that a preliminary sample has at least 30...
- Q The following data represent the flight time (in minutes) of a random sample of seven flights from one city to another city. 284, 270, 260, 266, 257, 263, 269 Compute...
- Q A factory machine is producing Jeans to the length of 49cm. The standard deviation of thepopulation is taken to be 0.3cm. A sample of 50 pairs of jeans is taken...
- Q Use the calculator displays to the right to make a decision to reject or fail to reject the null hypothesis at a significance level of a = 0.01Choose the correct...
- Q Your medical research team is investigating the standard deviation of the cost of a 30-day supply of a certain heart medication. A pharmaceutical company thinks that the standard deviation of...
- Q A researcher studies children in elementary school and finds a strong positive linear asso- ciation between height and reading scores. a) Does this mean that taller children are generally better...
- Q In a poll, 1,005 adults in a country were asked whether they favor or oppose the use of "federal tax dollars to fund medical research using stem cells obtained from...
- Q A small warehouse employs a supervisor at $1200 a week, an inventory manager at $700 a week, six stock boys at $400 a week, and four drivers at $500 a...
- Q For the statement below, write the claim as a mathematical statement. State the null and alternative hypotheses and identify which represents the claim.A laptop manufacturer claims that the mean life...
- Q A pharmaceutical company wants to test the effectiveness of a new allergy drug. The company identifies 250 females 30-35 years old who suffer from severe allergies. The subjects are randomly...
- Q True or false If false, explain briefly.a) We choose the linear model that passes through the most data points on the scatterplot.b) The residuals are the observed y-values minus the...
- Q Determine whether the underlined number describes a population parameter or a sample statistic. Explain your reasoning.A survey of 2213 adults in a country found that 85% think that militant terrorists...
- Q A local chess club claims that the length of time to play a game has a mean of 27 minutes or more. Write sentences describing type I and type II...
- Q Choose the correct description of the population.A. The party of registered voters in the countyB. The number of registered voters in the county who responded to a surveyC. The number...
- Q A sample of students is selected and it is found that 50% own a television. Choose the correct statement below.Parameter because the value is a numerical measurement describing a characteristic...
- Q Define and distinguish among mean, median, and mode.Choose the correct description of the mean below.A. The mean is the middle value in a data set. It is not affected by...
- Q The numbers of words defined on randomly selected pages from a dictionary are shown below. Find the mean, median, and mode of the listed numbers.69 33 50 49 66 59...
- Q For any set of data, what must be done to the data before percentiles can be determined?Choose the correct answer below.A. The data must be ranked.B. The quartiles of the...
- Q For the following set of numbers, find the mean, median, mode and midrange.11, 11, 12, 13, 15, 15, 15, 16, 27The mean isThe median isSelect the correct choice below and...
- Q By studying the standard deviation formula, given below, explain why the standard deviation of a set of data will always be greater than or equal to 0.s=??(x-x) n-1Choose the correct...
- Q If you compared the distribution of weights of 20 elite female gymnasts to the distribution of weights of 20 randomly selected women, you would expect the variation of the weights...
- Q The salaries of 10 employees of a small company are listed. Complete parts (a) through (f) below.a) Determine the mean.The mean salary is $ 37100.(Simplify your answer.)b) Determine the median
- Q Determine the mean, median, mode, and midrange of the set of data.1, 9, 10, 26, 36, 15, 11, 8, 1
- Q The prices of the 19 top-rated all-season tires for a specific tire size, are as follows. Answer parts (a) - (c).$87 $115 $98 $79 $81 $92 $94 $88 $94 $80$108...
- Q Coke wants to survey people at the Indiana State Fair and try and decide if they like Diet Coke or Diet Pepsi better. Coke hires the employees and supplies all...
- Q Identify the sampling technique used to obtain the following sample.A state is divided into regions using zip codes. A random sample of 40 zip code areas is selected.Choose the correct...
- Q Find the range and standard deviation of the set of data.6, 10, 11, 13, 14, 18The range is 12.(Simplify your answer.)The standard deviation is(Round the final answer to the nearest...
- Q You have the following question on a survey. "Would you like a greasy hamburger that is microwaved for lunch or would you rather have a lean, healthy, grass fed grilled...
- Q Find the range and standard deviation of the set of data.230, 235, 240, 245, 250, 255, 260The range is 30.(Simplify your answer.)The standard deviation is
- Q The following statistics represent weekly salaries at a construction company.Mean $800 First quartile $430Median $690 Third quartile $765Mode $680 83rd percentile $805The most common salary is $ 680.The salary that...
- Q Without actually doing the calculations, decide which, if either, of the following two sets of data will have the greater standard deviation. Explain why.5,8,9,10,12,1612,13,13,14,14,15Choose the correct answer below.A. The standard...
- Q Classify this question: "Are you willing to deal with the noise and increased traffic just to have another unnecessary store like IKEA built in Indianapolis?"BiasedUnbiased
- Q McDonalds wanted to find out the favorite sandwich of teen-agers from the ages of 15 - 18. They release a questionnaire to 3 local high schools and ask them to...
- Q You want to estimate the number of students in a high school who ride the bus. Which sample is best?7 random students in the hallway50 students in the band100 students...
- Q You want to know what freshman think of their science class. You poll 100 freshman by using a random number generator to pick students by their student number.RandomNon-random
- Q The mean height of women in a country (ages 20-29) is 64.2 inches. A random sample of 65 women in this age group is selected. What is the probability that...
- Q You survey customers at a mall. You want to know which stores they shop at the most. You walk around a computer shop and choose 20 customers there for your...
- Q The amount of money Stephanie collected in tips in each of seven days is $46, $82, $103, $27, $54, $71, and $65. Determine the mean, median, mode, andmidrange.
- Q The population mean and standard deviation are given below. Find the required probability and determine whether the given sample mean would be consideredunusual.For a sample of n = 70, find...
- Q Find the probability and interpret the results. If convenient, use technology to find the probability.The population mean annual salary for environmental compliance specialists is about $62,000. A random sample of...
- Q What is a sample obtained by using chance methods? Every member of the population has an equal chance of being selected.biasednone of the answer choicesrandomsystematic
- Q Classify the following: A person's salary and the amount of money saved.No correlationCorrelation that implies causationCorrelation only
- Q Identify the study as observational, experimental, or neither.A professor finds that people who are overweight have higher cholesterol levels than those that are not overweight.experimentalobservationalneither answer choice
- Q A superintendent of schools decided to look at the GPA of the two high schools in his district to decide which one should receive more funding. High School A's GPA...
- Q The mean height of women in a country (ages 20-29) is 63.9 inches. A random sample of 75 women in this age group is selected. What is the probability that...
- Q Construct the confidence interval for the population mean ?.c= 0.98, x? = 5.1, ?=0.9, and n=46
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