Statistics question and answers for September 19, 2023
- Q At most 69 of Internet users pay bills online Express the null and alternative hypotheses in symbolic form for this claim enter as a percentage Ho P H p Use...
- Q Use the method of least squares to find the parabola that is the best fit to the points 1 3 2 2 3 2 and 4 5 Graph the points...
- Q The p value for a hypothesis test turns out to be 0 07352 At a 6 level of significance what is the proper decision Reject Ho Fail to reject Ho
- Q Question 24 The weights for newborn babies is approximately normally distributed with a mean of 5 3 pounds and a standard deviation of 1 4 pounds Consider a group of...
- Q year the scores for the leading portion of a test were nomally distributed with a mean of a Find the probability that a randomly selected high school student who took...
- Q The data show the bug chirps per minute at different temperatures Find the regression equation letting the first variable be the independent x variable Find the best predicted temperature for...
- Q ou are conducting a study to see if the proportion of voters who prefer the Democratic candidate is gnificantly smaller than 70 at a level of significance of a 0...
- Q A variable is normally distributed with mean 20 and standard deviation 7 Use your graphing calculator to find each of the following areas Write your answers in decimal form Round...
- Q The lengths of mature trout in a local lake are approximately normally distributed with a mean of 13 3 inches and a standard deviation of o 1 9 inches Fill...
- Q 60 C d a The mean is b The standard deviation is e 64 Use the Empirical Rule to answer the following questions f 68 g h 72 Test Scores...
- Q A variable is normally distributed with mean 21 and standard deviation 3 Round your answers to the nearest hundredth as needed a Determine the z score for x 26 Z...
- Q The time to complete an exam is approximately Normal with a mean 50 minutes and a standard deviation a 9 minutes The bell curve below represents the distribution for testing...
- Q The testing times for a group of college students were normally distributed with a mean of 36 minutes and a standard deviation of o 3 3 minutes The bell curve...
- Q In a normal distribution a data value located 1 3 standard deviations below the mean has Standard Score z In a normal distribution a data value located 2 1 standard...
- Q A set of exam scores are approximately normally distributed with mean 68 and standard deviation 7 Use the Empirical Rule to determine the area of the shaded regions shown below...
- Q 25 36 47 a The mean is Based on the graph of this normal distribution b The standard deviation is 58 c 68 of the data values are between d...
- Q A set of exam scores is normally distributed with a mean 80 and standard deviation 6 Use the Empirical Rule to complete the following sentences 68 of the scores are...
- Q 2 Suppose that the platelet count measured in thousands per cc of blood in humans is approximately normally distributed with mean 272 8 and standard deviation 44 6 Let x...
- Q 60 70 a The mean is b The median is c The mode is 80 Based on the graph of this normal distribution Querties d The standard deviation is 90...
- Q Normal Distribution 1 Circumferences of regulation soccer balls have a mean of 69 cm with a standard deviation of 1 50 cm Assume that the circumferences of soccer balls are...
- Q benehts and the other is harmed is known as parasitism C There s yet another class of symbiosis that is controversial among scientists D Given the forces of natural selection...
- Q For a hypothesis test alpha 0 05 The computed P Value 0 1 Should HO be rejected Reject H 0 O Fail to Reject H 0 What is the correct...
- Q According to the Centers of Disease Control about 20 of American young people between the ages of 12 and 19 are obese A student claims that the students in his...
- Q According to the CDC the average weight of men in 1990 was 181 pounds Consider a claim that the average weight of men increased by 2014 https abcnews go com...
- Q f your claim is in the alternative hypothesis and you reject the null hypothesis then your conclusion would e The sample data support the original claim There is not sufficient...
- Q A manufacturer of rechargeable laptop batteries markets its batteries as having on average 500 charges A consumer group decides to test this claim by assessing the number of times 30...
- Q The blue catfish Ictalurus Furcatus is the largest species of North Amercian catfish The current world record stands at 143 pounds which was caught in the John H Kerr Reservoir...
- Q The following table shows students test scores on the first tw First test x Second test y C 53 93 45 6 57 98 53 6 Copy Data Step 1...
- Q a Identify the claim and state H and H Ho H Type integers or decimals Do not round The claim is the A consumer group claims that the mean minimum...
- Q Women are recommended to consume 1900 calories per day You suspect that the average calorie intake is smaller for women at your college The data for the 11 women who...
- Q The average number of accidents at controlled intersections per year is 4 3 Is this average less for intersections with cameras installed The 66 randomly observed intersections with cameras installed...
- Q The average American consumes 91 liters of alcohol per year Does the average college student consume more alcohol per year A researcher surveyed 13 randomly selected college students and found...
- Q 16 Investing Stocks and Bonds Do bonds reduce the overall risk of an investment portfolio Let x be a random variable representing annual percent return for Vanguard Total Stock Index...
- Q A research center claims that 28 of adults in a Cain country would travel into space on a ommercial flight if they coul afford it In a random sample of...
- Q A sample of 275 households in Elk Grove found that 178 of them follow current water restrictions for their neighborhoods The 99 confidence interval estimate for p the proportion of...
- Q At a particular location on Long Island a sample of precipitation levels from 10 Septembers in recent 2 92 inches and s 0 63 inches What is the 95 confidence...
- Q rk 7 3 K A coin is flipped until two tails ap through d below
- Q The mean weight of female dancers in a local modern dance company is at least 149 lbs Express the null and alternative hypotheses in symbolic form for this claim H...
- Q One number is 5 times a first number A third number is 100 more than the first number If the sum of the three numbers is 632 find the numbers
- Q 58 of workers indicate that they are mildly satisfied with their job Express the null and alternative hypotheses in symbolic form for this claim enter as a percentage Ho P...
- Q An article in the San Jose Mercury News stated that students in the California state university system take 5 5 years on average to finish their undergraduate degrees A freshman...
- Q From previous studies it is concluded that 30 of phone numbers in a certain city are unlisted A researcher claims that the proportion is larger than 30 and decides to...
- Q In 2011 a U S Census report determined that 56 of college students are working students A researcher thinks this percentage has changed and surveys 185 college students The researcher...
- Q The average student loan debt is reported to be 25 235 A student believes that the student loan debt is higher in her area She takes a random sample of...
- Q Peace of Mind Investments maintains a data base of companies they recommend to clients interested in investing only in organizations with the highest ethical standards The most prominent companies listed...
- Q A chi square distribution with 12 degrees of freedom is graphed below The region under the curve to the right of 16 is shaded 0 20 0 15 0 10...
- Q The mean SAT score in mathematics is 498 The founders of a nationwide SAT preparation course claim that graduates of the course score higher on average than the national mean...
- Q A chi square distribution with 5 degrees of freedom is graphed below The region under the curve to the right of 0 25 is shaded The area of this region...
- Q A researcher is going to perform a two tailed hypothesis test The test statistic will follow a standard normal distribution Answer parts a and b below You may use the...
- Q You are a researcher studying the health habits of people living in a large rural area In particular you are interested in the amount of weight gained early in life...
- Q Assume that last year in a particular state with 700000 children there were 1278 children out of 32500 in a random sample who were diagnosed with Autism Spectrum Disorder Nationally...
- Q 4 Create a scatterplot for the data in the table Based on the appearance of the scatterplot wh model does the data appear to follow High Temperature F Electric Bill...
- Q A County Board of Supervisors has appointed an urban planning committee to evaluate proposed community development projects The committee is analyzing among other things data on household Incomes in two...
- Q A is the set of outcomes when a coin is flipped A H T 1 2 3 4 5 6 C is the set of outcomes when a tetrahedral die...
- Q itity theft 23 of all complaints in 2007 were for identity theft In that year assume some state had 414 complaints of identity theft out of 1650 consumer complaints Do...
- Q In July of 2013 Australians were asked if they thought unemployment would increase and 47 thought that it would increase In November of 2013 they were asked again At that...
- Q The salaries of the employees at four companies are summarized below Answer the questions about them Company A The range of salaries is 52 000 and the mean salary is...
- Q T ain c Your answer is incorrect Empirical research on stock market data indicates tha
- Q You are performing a two tailed test If a 005 find the positive critical value to three decimal places Za 2
- Q You are performing a right tailed test with test statistic z 2 149 find the p value accurate to 4 decimal places p value
- Q The large airline company Cloudscape knows random sample of 10 Cloudscape passengers distribution CH
- Q For a large top rated corporation 97 of employees said the corporation is a great place to work Suppose that we will take a random sample of 7 employees Let...
- Q Consider the value of t such that 0 05 of the Step 1 of 2 Select the graph which best represents the given description of t Answer 1 Point t...
- Q Withdrawal symptoms may occur when people who have stopped using the pain
- Q yerHomework aspx homeworkld 641541742 questionId 5 flu k Chikungu a Wikip Coagulaci n intrava E MYELT Question 2 Part 1 in the accompanying bar graph are from a random sample...
- Q The National Institute of Mental Health published an article stating that in any one year period approximately 9 7 of American adults suffer from depression or a depressive illness Suppose...
- Q Ho p 0 25 H p0 25 Your sample consists of 149 subjects with 43 successes Calculate the test statistic rounded to 2 places
- Q In an experiment to compare two pain relievers seven subjects took one pain reliever for two weeks then switched to the other They rated their pain level from 1 to...
- Q Eyeglassomatic manufactures eyeglasses for different retailers They test to see how many defective lenses they made in a given time period and found that 13 of all lenses had defects...
- Q Suppose that a used to test a two tailed null hypothesis The result was z 2 01 Which of the following represents the correct interpretation of this two samples z...
- Q Hurricane damage In August and September 20 severely damaged or destroyed and of those that present a health hazard due to the large amounts the cleaning of one or more...
- Q The average retirement age in America is 63 years old Do small business owners retire at a younger average age The data below shows the results of a survey of...
- Q A student was asked to find a 95 confidence interval for weight of their backpacks in pounds using data from a random sample of size n 20 Which of the...
- Q A student was asked to find a 98 confidence interval for widget width using data from a random sample of size n 24 Which of the following is a correct...
- Q The national average age for menopause is 51 years old and is normally distributed A nurse practitioner believes that women at her clinic reach menopause earlier than the national average...
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