Statistics question and answers for October 19, 2023
- Q Heights cm and weights kg are measured for 100 randomly selected adult males and range from heights of 136 to 191 cm and weigh of 40 to 150 kg Let...
- Q 3 When Hannah wakes up on time there is a 10 chance she will miss the bus for school If she oversleeps there is a 50 chance she will miss...
- Q In a particular survey of internet users 3633 respondents say that they use social networking sites and 1402 respondents say that they do not use social networking sites What is...
- Q Households are randomly selected and partitioned into groups of four For those groups the random variable x is the number of households with a printer Determine whether a probability distribution...
- Q Groups of adults are randomly selected and arranged in groups of three The random variable x is the number in the group who say that they would feel comfortable in...
- Q mal curve Those with z scores above 2 2 will receive an A those between 2 2 and 0 8 will receive a B those between 0 8 and 0...
- Q A computer randomly selects a number from 1 through 50 Two selections are made by the computer to create an ordered pair of numbers How many elements are in the...
- Q Mr Sanderson marks his class on a normal curve Those with z scores above 2 2 will receive an A those between 2 2 and 0 8 will receive a...
- Q Assume the annual day care cost per child is normally distributed with a mean of 8000 and a standard deviation of 1400 What percent of day care costs are more...
- Q 1 The table shows the number of turtles hatched at a zoo each year since 2003 a Find the line of best fit b Predict the number of turtles to...
- Q A poll showed that 48 out of 120 randomly chosen graduates of California medical schools last year intended to specialize in family practice What is the width of a 90...
- Q Use the set of data below to do the following a Draw a scatter diagram b Find the value of r c Determine whether a correlation exists at 0 05...
- Q 4 51 Pitchers The table shows the number of wins and the num ber of strike outs SO for 40 baseball pitchers in the major leagues in 2011 Source 2011...
- Q A 95 percent confidence interval for the true mean time spent preparing and recording a lecture is reported to be 75 to 95 minutes The point estimate for the true...
- Q The research department of a board game company surveyed some shoppers at a local mall The team asked shoppers how often they read the news among other questions Then the...
- Q The data to the right represent the cost of living for 20 states The cost of living is a measure of the average price paid for housing utilities groceries healthcare...
- Q The accompanying data represent the approximate population in millions of the 20 most populous cities in the world Use these data to construct a frequency distribution with a first class...
- Q 4 6 Comparing Salaries The scatterplot shows the salary and year of first employment for some professors at a college Explain in context what the negative trend shows Who makes...
- Q In general round z scores to 2 decimal places and probabilities to 4 decimal places 1 As part of a study of property values in Minneapolis an appraisal company chose...
- Q SECTION 4 1 1 Predicting Land Value Both scatterplots concern the ssessed value of land with homes on the land and both depict he same observations a Which do you...
- Q 3 58 of students at a certain college are fernale A random sample of 50 students is to be selected Let the random variable X be the number of female...
- Q RY 4 5 Weight Loss Example 1 The scatterplot shows the actual weight and desired weight change of some students Thus if a student weighed 220 and wanted to weigh...
- Q Women s Median dollars per yea 50000 45000 40000 35000 30000 3 40000 50000 60000 70000 80000 Men s Median Pay dollars per year b Use the regression equation above...
- Q 4 18 Matching Pick the letter of the graph that goes with each numerical value listed below for the correlation Correlations 0 903 0 374 0 777 A Acreage 6...
- Q Count the number of F s in the following sentence Finished files are the result of years of scientific study combined with the experience of years There are F s
- Q 4 7 Sisters and Brothers The scatterplot shows the numbers of brothers and sisters for a large number of students Do you think the trend is somewhat positive or somewhat...
- Q 4 4 Shoe Size and GPA The figure shows a scatterplot of shoe size and GPA for some college students Does it show an increasing trend a decreasing trend or...
- Q Proceed as in Example 4 in Section 11 3 to find a particular solution xo t of equation 11 in Section 11 3 kx f t 11 m xp t...
- Q The Abco Company manufactures electrical assemblies The current process uses 10 workers and produces 200 units per hour You are considering changing the process with new assembly methods that increase...
- Q Consider the function C f x 1 0 x 1 1 20 0 x 1 0 Find the half range cosine expansion of the given function 1 200 f x...
- Q Expand the given function in a Fourier series Give the Fourier series that is the periodic extension off with period 2r f x x 0 x 2 r f x
- Q 3 58 of students at a certain college are female A random sample of 50 students is to be selected Let the random variable X be the number of female...
- Q 1 The table shows the wind chill factor for various wind speeds when the Fahrenheit temperature is 40 Wind Speed x 10 15 20 25 32 30 29 Wind chill...
- Q 12 You buy a sharing size package of 125 M Ms and 120 of them are red What is a 95 confidence interval for the true proportion of red M...
- Q 4 Assume that the finishing times in a New York City 10 kilometer road race are normally distributed with a mean of 63 minutes and a standard deviation of 8...
- Q 8 Determine if the variable is discrete or continuous 1 5 pts ea a No of ounces dispensed in a cup of coffee b No of televisions in a household
- Q 7 Identify the method of sampling simple random systematic stratified cluster convenience 4 pts a The country is divided into economic classes and a sample of 500 households from each...
- Q N Consider the following data set 120 170 157 172 183 162 156 84 195 169 158 171 a Obtain the five number summary for the given data 5 pts...
- Q 5 To qualify for security officers training recruits are tested for stress tolerance The scores are normally distributed with a mean of 72 and a standard deviation of 9 If...
- Q accompanying lavie are heights in of mothers and their first daughters The data pairs are from a journal kept by Francis Galton Use the listed paired sample data and assume...
- Q A high school guidance counselor has a pamphlet that says that 40 of all high school students go to a community college after graduation In a survey of 275 randomly...
- Q According to the 2014 National Survey on Drug Use and Health 11 4 of adolescents in the United States had at least one major depressive episode MDE in the year...
- Q In 2012 the U S Food and Drug Administration approved the first over the counter HIV testing kit the OraQuick In Home HIV Test The sensitivity and specificity of a...
- Q Polydactyly is a fairly common congenital abnormality in which a baby is born with one or more extra fingers or toes It is reported in about one child in every...
- Q Hemophilia refers to a group of rare hereditary disorders of blood coagulation Because the disorder is caused by defective genes on the X chromosome hemophilia affects primarily men According to...
- Q Birth certificates show that approximately 9 of all births in the United States are to teen mothers ages 15 to 19 24 to young adult mothers age 20 to 24...
- Q A large governmental survey of dental care among children 2 to 17 years old found the distribution of times since the last visit to the dentist Time since last visit...
- Q Manatees are an endangered species of herbivorous aquatic mammals found primarily in the rivers and estuaries of Florida As part of its conservation efforts the Florida Fish and Wildlife Commission...
- Q Determine whether to reject or fail to reject Ho at the level of significance of a a 0 08 and b a 0 05 Ho 138 H 138 and P...
- Q A large study of German children of Caucasian descent found that 46 have brown hair and that 25 have freckles Nonetheless you cannot conclude that because 0 46 0 25...
- Q symbolic form More than 29 of Internet users pay bills online ess the full hypothesis Ho and the alternative hypothesis H in OC Ho p 0 29 H p 0...
- Q Find the A 3 The critical value s is are Round to two decimal places as needed Use a comma to separate answers as needed Draw a graph of the...
- Q Use the given data to find the minimum sample size required to estimate a population proportion or percentage n Margin of error two percentage points confidence level 90 from a...
- Q A researcher want to determine an interval estimate for the average weight of adult gorillas in pounds She wants to be 95 certain that she is within 5 7 of...
- Q An article reported that for a sample of 41 kitchens with gas cooking appliances monitored during a one week period the sample mean CO level ppm was 654 16 and...
- Q A sample of ultimate tensile strength observations ksi was taken Use the accompanying descriptive statistics output from Minitab to calculate a 99 lower confidence bound for true average ultimat tensile...
- Q In a survey of 3484 adults aged 57 through 85 years it was found that 84 2 of them used at least one prescription medication a How many of the...
- Q Use the simplex method to find x 20 and x2 20 such that X 3x 221 X X 543 and such that z 12x 10x2 is maximized You MUST SHOW...
- Q isted in the accompanying table are heights in of mothers and their first daughters The data pairs are from a journal kept by Francis Galton Use the isted paired sample...
- Q Find the standard score and the percentile for a data value 2 5 standard deviations above the mean O A z 2 5 Percentile 1 95 OB z 2 5...
- Q A graduate student wanted to estimate the average time spent studying among graduate students at her school She randomly sampled graduate students from her school and obtained a 99 confidence...
- Q A Use the given confidence interval limits to find the point estimate p and the margin of error E 0 768 0 944 6 0 E I
- Q Salaries of 43 college graduates who took a statistics course in college have a mean x of 61 900 Assuming a standard deviation o of 10 395 construct a 95...
- Q Researchers studied the mean egg length in millimeters for a bird population After taking a random sample tempts of eggs they obtained a 95 confidence interval of 45 60 What...
- Q 4 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...
- Q Are you smarter than a second grader A random sample of 62 second graders in a certain school district are given a standardized mathematics skills test The sample mean score...
- Q A 99 confidence interval for the mean surgery time for this procedure is 132 8 143 4 Part 1 2 Part 2 of 2 X S b If a 90...
- Q If a Type II error is made what conclusion will be drawn regarding the mean breaking strength The conclusion will be that the mean breaking strength is less than 50...
- Q A 98 confidence interval for the proportion of people who performed volunteer work in the past year is Part 2 3 Part 3 of 3 X p c A sociologist...
- Q A concerned group of citizens wanted to determine whether the proportion of armed robberies in the state of Texas was different in 2011 than in 2010 Research shows that of...
- Q Part 1 of 2 a An article in a medical journal suggested that approximately 5 of such operations result in complications Using this estimate what sample size is needed so...
- Q Testing testing An instructor believes that the mean time that students will spend on the take home test is 8 hours A test is made of H 8 versus H...
- Q b Should this confidence interval be used to estimate the mean weight of all one year old babies in the United States Explain The confidence interval Choose one be used...
- Q a Construct a 90 confidence interval for the mean weight or all one year old baby boys in the United States Round the answer to at least one decimal place...
- Q 3 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...
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!