Statistics question and answers for September 13, 2023
- Q An economist would like to estimate the average household income in Okechobee county The mean household income of a random sample of 152 families in Okechobee county was found to...
- Q Find the potential function f for the field F F 10x y5z7i 5x10y4z7j 7x10y5z6k 95 7 O A f x y z x 0y15 21 C OB f x y...
- Q Here yesterday s high temperatures in Fahrenheit in 14 U S cities 50 53 54 59 59 61 61 69 71 71 73 80 81 82 Notice that the temperatures...
- Q Espa ol The following are the ages of 11 music teachers in a school district 28 29 30 33 37 40 41 46 46 49 52 Notice that the ages...
- Q L m z y dzdy 1 Jy louble integral what is the answer if you use fubini to change order of ntegration
- Q Approximately 1 500 students attend Jones Middle School Below is the data collected from two random samp of 100 students regarding school lunch preference Sample 1 2 Hamburgers 12 12...
- Q A population of values has a normal distribution with 46 5 and o 20 1 You intend to draw a random sample of size n 90 NOTE Questions to ask...
- Q A normal distributed population has parameters 226 7 and o 89 1 If a random sample of size n 226 is selected a What is the mean of the distribution...
- Q The manager of a computer retail store is concerned that his suppliers have been giving him laptop computers with lower than average quality His research shows that replacement times for...
- Q A computer selects a number X from 2 to 9 randomly and uniformly Round all answers to 4 decimal places where possible a What is the distribution of X X...
- Q A population of values has a normal distribution with 12 7 and o 75 A random sample of size n 48 is drawn Find the probability that a sample of...
- Q Suppose the age that children learn to walk is normally distributed with mean 13 months and standard deviation 2 4 month 32 randomly selected people were asked what age they...
- Q uestion 6 unation 7 O Area under the standard normal distribution to the left of Z page 2 3 0 8 0 1 6 3 0 3 04 50 0...
- Q A standardized exam s scores are normally distributed In a recent year the mean test score was 20 7 and the standard deviation was 5 4 The test scores of...
- Q struct a frequency distribution and a relative frequency histogram for the data set using five classes Which class has the greatest relative frequency and which has the least relative frequency...
- Q The acccompanying data set lists the retirement ages for 24 doctors Use the data to construct a cumulative frequency distribution using six classes and to create an ogive for the...
- Q Click the icon to view the data set Complete the frequency distribution table below Use the minimum data entry as the lower limit of the first class Class Frequency Midpoint...
- Q High school graduates The National Center for Educational Statistics reported that 82 of freshmen entering public high school in the U S in 2009 graduated with their class in 2013...
- Q The accompanying data set lists the numbers of children of world leaders Use the data to construct a frequency distribution using six classes and to create a frequency polygon Describe...
- Q Electric bills The U S Energy Information Agency reported that the mean monthly household electric bill in the United States in a recent year was 110 14 Assume the amounts...
- Q 3 Example Confident Interval x standard 7 1 and standard error error 2 3 Construct a 98 A large sample has mean 7 1 and confident interval for the population...
- Q 10 Use the Central Limit Theorem to compute probabilities involving sample means A population has mean 50 0 and standard deviation o13 0 A sample of size 110 is drawn...
- Q 2 Area under standard Normal Curve TI 84 Plus using the 2 tast Find the area to the left of z 1 45 that the area to the left is...
- Q 18 Example 2 Confidence Interval TI 84 Plus deviation of 9 84 hours Assume this is a simple random sample from the population internet in an average week The sample...
- Q Scientists want to estimate the mean weight of mice after they have been fed a special diet A sample of 70 mice have been weighed and the standard deviation was...
- Q 2 points The arrival of patients to a pharmacy can be approximated by a Poisson distribution with a standard deviation of 1 6 hours The facility opens from 8 am...
- Q 3 3 points A company is conducting staff development training remotely for its 65 management staff across the nation During specialty sections participants were assigned to three breakout rooms according...
- Q 200nsip2 bailgga brs ankesnigna to 2 2 points The management of a particular gas station estimated that a quarter of customers do not fill their tanks It is assumed that...
- Q Suppose z follows the standard normal distribution Calculate the following probabilities using the ALEKS calculator Round your responses to at least three decimal places a P Z 0 84 0...
- Q During the busy season it is important for the shipping manager at ShipMundo to be able to estimate the time it takes the loading crew to load a truck The...
- Q Ravi a highway safety inspector is concerned about the potential for accidents caused by boulders that fall down a sandstone cliff beside a main highway As part of an accident...
- Q and 0 1 Y a random variable with values iii 0 1 2 Initially we have the following partial information about their joint probability mass function Subsequently we learn the...
- Q 2 The Triple E Lumber store found that 3 out of every 10 hammer drills they recently received were not properly assembled If they received 495 hammer drills about how...
- Q uppose Victor is conducting a study to discover a potential association between overall happiness and income level Victor andomly surveys 241 American adults and asks them to report their overall...
- Q Many birds are injured or killed by flying into windows It appears that birds do not see windows Can tilting windows down so that they reflect earth rather than sky...
- Q randomly selected n 259 adults who used a desktop or laptop outside of the workplace tablets and smartphones were excluded The subjects were asked to identify the operating system of...
- Q Rice is one of the most widely consumed grain worldwide As increasing global temperatures hamper rice production scientists are searching for varieties exhibiting some degree of heat resistance The HT54...
- Q acmillan Learning Suppose Sora is arguing with her mother Jane Jane believes that Sora eats mostly candy and doesn t eat enough fruits and vegetables but Sora claims that she...
- Q Consider the value of such that 0 05 of the area under the curve is to the right of 7 Step 1 of 2 Select the graph which best represents...
- Q A survey of 1010 college seniors working towards an undergraduate degree was conducted Each student was asked Are you planning or not planning to pursue a graduate degree Of the...
- Q f Now assume instead the government increases spending without changing taxes to close the recessionary gap What effect will this policy have on the national debt
- Q A university dean is interested in determining the proportion of students who receive some sort of financial aid Rather than examine the records for all students the dean randomly selects...
- Q Five randomly selected men were asked to run on a treadmill for 6 minutes After the 6 minutes their pulses were measured and the following data were obtained 122 114...
- Q In a random sample of 60 dog owners enrolled in obedience training it was determined that the mean amount of money spent per owner was 109 33 per class and...
- Q A pollster wishes to estimate the number of left handed scientists What size sample should be obtained in order to be 98 confident that the sample proportion will not differ...
- Q A local bank needs information concerning the savings account balances of its customers A random sample of 15 accounts was checked The mean balance was 686 75 with a standard...
- Q Find the critical t value that corresponds to 99 confidence and n 10 Round to three decimal places A 2 821 B 2 262 O C 3 250 D 1...
- Q g Draw a correctly labeled graph of the loanable funds market and show the effect of the change in the national debt on the equilibrium real interest rate
- Q A researcher at a major clinic wishes to estimate the proportion of the adult population of the United States that has sleep deprivation What size sample should be obtained in...
- Q A group of 19 randomly selected employees has a mean age of 22 4 years with a standard deviation of 3 8 years Construct a 99 confidence interval for the...
- Q A random sample of 10 parking meters in a resort community showed the following incomes for a day Assume the incomes are normally distributed Find the 95 confidence interval for...
- Q Determine the critical value Za 2 that corresponds to the given level of confidence rounding to two decimal places 88 A 1 56 OB 1 18 O C 1 21...
- Q A sample of 15 randomly selected math majors has a grade point average of 2 86 with a standard deviation of 0 78 Construct a 90 confidence interval for the...
- Q A survey of 2 620 musicians showed that 339 of them are left handed Find a point estimate for p the population proportion of musicians that are left handed rounding...
- Q An economy is currently in a recession a Draw a single correctly labeled graph with both the short run and long run Phillips curves Label the current short run equilibrium...
- Q A survey of 500 non fatal accidents showed that 113 involved faulty equipment Find a point estimate for p the population proportion of accidents that involved faulty equipment rounding to...
- Q A normal distribution has a mean of 37 and a standard deviation of 3 Find the probability that a randomly selected x value from the distribution is in the given...
- Q Woodland and Willow Road are schools in different states The heights of students at Woodland have a population mean of 54 5 inches and a standard deviation of 1 7...
- Q Center to see if she really has psychic abilities While talking to her on the phone we ll thoroughly shuffle a standard deck of 52 cards which is made up...
- Q Circles G and H have centers 0 3 and 4 5 and radii of lengths 2 and 10 respectively To prov circle G similar to circle H each of the...
- Q There is a weekend fishing competition that Ivan participates in each year There are several other fishing boats that participate in this competition Ivan caught 42 fish at the competition...
- Q 14 A study examined the effect of protein consumption on weight gain in rats Investigators obtained 14 female rats and randomly assigned 7 of them to a low protein diet...
- Q 10 A manufacturer claims that the mean driving cost per mile M of its vehicles is less than that of its leading competitor You conduct a study using 30 randomly...
- Q 17 Which of the following statements would lead us to believe that the t procedures were NOT safe to use here The experiment was not double blinded The distributions of...
- Q 7 Researchers examined the effect of phosphate supplementation on bone formation in 6 healthy adult dogs For each dog bone formation was measured twice once after 12 weeks of phosphate...
- Q 13 Under which of the following conditions can a large P value arise a Ho is indeed true b Ho is not actually true but too close to the real...
- Q 5 Based on this test and using a significance level of 0 05 what should we conclude a Reject the null hypothesis P 0 05 b Reject the null hypothesis...
- Q 3 Here are some summary statis university
- Q 1D Practice 1 Researchers in an early childh vocabularies of young children Age Mean
- Q 7 The histogram represents the distribution of the number of seconds it took for each of 50 students to find the answer to a trivia question using the internet Which...
- Q 1 Twenty students participated in a psychology experiment w rates in two different situations 70 70 75 75 80 80 85 90 situation A 85 90 situation B 95 00...
- Q 2 Which of the dot plots shows a skewed distribution C A B 1 1 9 0 5 1 10 1 2 1 3 11 12 1 4 1 5...
- Q 6 The dot plots display the height rounded two different tree farms 3 3 4 4 5 LO 5 6 6 00 7 7 8 heig 000 8
- Q A national chain of department stores ranks its 900 000 salespeople by the monetary value of their sales Ahmad s sales are at the 93rd percentile Teresa s sales are...
- Q 4 Here are two box plots 95 95 100 100 box
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