Statistics question and answers for October 15, 2023
- Q The percentage of seeds that germinate under ideal conditions is known as the germination rate of a seed For instance if 100 soybean seeds are planted and 88 germinate then...
- Q toothpaste A consumer advocacy group is highly suspicious of this claim and randomly surveys 269 dentists They find that 95 7 of the sample recommends the given brand of toothpaste...
- Q 2 While the exact distribution of the shearing stresses in a hollow cylindrical shaft is as shown in Fig a an approximate value can be obtained for Tmax by assuming...
- Q You are performing a right tailed z test If a 025 find the critical value to two decimal places HINT Remember to pay attention to whether you want a z...
- Q A public health official in Indian River county needs to estimate the average systolic blood pressure of all residents in Indian River county for a report that is being prepared...
- Q Determine the critical value s for a left tailed hypothesis test for a mean with the given characteristics Round any z value solution to two decimal places Round any t...
- Q An adviser in student services would like to estimate the average monthly car payment of all IRSC students From past research it is known that the standard deviation of the...
- Q A forester with the National Park Service was tasked with estimating the average age of the bald cypress trees Taxodium distichum in Big Cypress Swamp a region in Everglades National...
- Q An epidemiologist with the Florida Department of Health needs to estimate the proportion of Floridians who are infected with the corona virus but are asymptomatic show no signs of the...
- Q Suppose a hypothesis test was conducted for a proportion using a signifance level of 0 5 The p value for the test was calculated to be p 0 0039 Determine...
- Q Which if any of the following pairs are hypotheses for Ho p 23 Hi p 23 Ho 87 H p 87 Ho 25 H 25 Ho 229 H 29 H...
- Q 15 points 8 Good credit The Fair Isaac Corporation FICO credit score is used by banks and other lenders to determine whether someone is a good credit risk Scores range...
- Q The mean height of a certain kind of plant is 131 centimeters Suppose we want to carry out a hypothesis test to see if the mean height when these plants...
- Q You measure 38 dogs weights and find they have a mean weight of 30 ounces Assume the population standard deviation is 6 7 ounces Based on this construct a 95...
- Q 9 15 points Cable TV choices A telecommunications company provided Its cable TV subscribers with free access to a new sports channel for a period of one month It then...
- Q 10 point Babies According to a recent report a sample of 300 one year old baby boys in the United States had a mean weight of 25 5 pounds Assume...
- Q The lifetime of a certain brand of electric light bulb is known to have a standard deviation of 47 hours Suppose that a random sample of 80 bulbs of this...
- Q 15 points 7 House prices Data from the National Association of Realtors indicates that the mean price of a home in Denver bu Colorado In 2012 was 260 7 thousand...
- Q 4 10 points Changing jobs A sociologist sampled 228 people who work in computer related jobs and found that 51 of them have changed jobs in the past 6 months...
- Q 6 Determine whether the outcome is a Type I error a Type II error or a correct decision A test is made of H 32 versus H 32 The true...
- Q 7 points PC Gaming A computer magazine editor claims that the mean cost of a gaming computer is 1250 A test is made of Hol 1250 versus H u 1250...
- Q 3 10 points Let s go to the movies A random sample of 42 Foreign Language movies made since 2000 had a mean length of 110 2 minutes with a...
- Q 10 points Find the critical value 2 needed to construct a confidence interval with level 85 Round your final answer to 2 digits after the decimal point
- Q and 12 Question 26 of 82 The bar graph below shows that as costs changed over the decades a group of people devoted less of their budget to groceries Percentage...
- Q Assume that a normal distribution of data has a mean of 17 and a standard deviation of 5 Use the empirical rule to find the percentage of values that lie...
- Q Complete the problems to find the profit or loss 1 You paid 1 829 for 40 shares of JTT stock You sold the stock for 61 50 per share The...
- Q greater than 5 You want to test this claim To do so you collect a large random sample from the population and perform a hypothesis test at the o os...
- Q 0 20 10 18 0 21 40 Question 43 2 points Given the 5 summary statistics of a data set Minimum 10 Lower Quartile 12 Median Upper Quartile Maximum 13...
- Q 2 5 38 41 30 33 36 39 42 Question 47 2 points A high school student spends an average of 6 hours 6 on their phone a day with...
- Q O 33 36 39 42 Question 50 2 points What is the critical value 24 associated with a 95 confidence interval SOLA 1904 2 anni 0 950 1 645 1...
- Q Question 46 2 points Determine the area under the normal curve between the z scores z 0 8 and 1 6 as shown in the graph 0 267 0 684...
- Q A wedding website states that the average cost of a wedding is 27 825 One concerned bride hopes that the average is less than reported To see if her hope...
- Q Sampie Question 37 2 points Which type of sampling method is being employed in the following example A study was being conducted after a tsunami The researcher was trying to...
- Q A manufacturer of potato chips would like to know whether its bag filling machine works correctly at the 421 gram setting It is believed that the machine is underfilling the...
- Q The National Academy of Science reported that 33 of research in mathematics is published by US authors The mathematics chairperson of a prestigious university wishes to test the claim that...
- Q A researcher believes that 5 of pet dogs in Europe are Labradors If the researcher is right what is the probability that the proportion of Labradors in a sample of...
- Q The mean output of a certain type of amplifier is 117 watts with a variance of 100 If 42 amplifiers are sampled what is the probability that the mean of...
- Q Decide if the statement is True or False Answer 2 Points A sampling distribution refers to individuals rather than groups O False
- Q Suppose the following estimated regression equation was determined to predict salary based on years of experien Estimated Salary What is the estimated salary for an employee with 3 years of...
- Q Score on last try 0 of 1 pts See Details for more You can retry this question below Suppose a jar contains 19 red marbles and 26 blue marbles If...
- Q Score on last try 0 of 1 pts See Details for more Next question You can retry this question below If you randomly select a letter from the phrase Ichiro...
- Q Using your favorite statistics software package you generate a scatter plot with a regression equation and correlation coefficient The regression equation is reported as y 66 69x 14 13 and...
- Q The mean height of a certain kind of plant is 167 centimeters Suppose we want to carry out a hypothesis test to see if the mean height when these plants...
- Q 1 30 students in SUNY New Paltz plan to have lunch in New Paltz There are plenty of restaurants in New Paltz and they have 20 restaurants they can choose...
- Q Answer the following questions on the F test statistic Complete parts a through d below a If s represents the larger of two sample variances can the F test statistic...
- Q Large samples of women and men are obtained and the hemoglobin level is measured in each subject Here is the 95 confidence interval for the difference between the two population...
- Q The radioactive isotope Pu 240 has a half life of about 6564 years If 50 grams present now how much will be left 3 000 years from now Round to...
- Q On the Orange River a particular boat traveling with the current can travel 72 miles in 2 hours Traveling against the current the boat can travel 54 miles in 2...
- Q The graph of y 52 13 70 is the graph of y 5 shifted how State the direction of each shift followed by the number of units of that shift...
- Q A chemist needs to mix a 10 alcohol solution with a 70 alcohol solution to get 15 liters of a 46 alcohol solution How many liters of the 10 solution...
- Q How long does it take a 5200 investment to double when it is invested at 3 7 interest compounded quarterly Use the compound interest formula Round to the nearest hundredth...
- Q After studying all night for a final exam a bleary eyed student randomly grabs 2 socks from a drawer containing 13 black socks 8 brown socks and 2 blue socks...
- Q A reader wrote the following passage to a column in a magazine You have 6 envelopes to pick from Two thirds that is 4 are empty One third that is...
- Q For the experiment described below let x determine a random variable and use your knowledge of probability to prepare a probability distribution The sums that appear when two fair four...
- Q wo cards are drawn at random from an ordinary deck of 52 cards What is the probability that all 2 are the same ne probability is P E ype an...
- Q K Twenty five slips of paper are each marked with a different letter of the alphabet and placed in a basket A slip is pulled out its letter recorded in...
- Q Three crows 6 blue jays and 7 starlings sit in a random order on a section of telephone wire Find the probability that birds of a feather flock together that...
- Q Find the expected payback for a game in which you bet 8 on any number from 0 to 999 If your number comes up you get 500 The expected payback...
- Q A survey found that customers are overcharged by price scanning systems on average on 1 65 of items Suppose a customer purchases 14 items Find the following pr A customer...
- Q A die is rolled 10 times Find the probability of rolling no more than 4 sixes The probability of rolling no more than 4 sixes is Type an integer or...
- Q A bag contains 5 red balls and 3 blue balls If 2 balls are selected at random find the probability of selecting 2 red balls Which of the following can...
- Q A die is rolled 4 times Find the probability of rolling exactly 1 five Use the formula for binomial probability to calculate the probability of rolling exactly 1 five Assume...
- Q A survey finds that customers are overcharged by price scanning systems on average on 1 70 of items Suppose a customer purchases 10 items Find the following proba A customer...
- Q A raffle offers a first prize of 1000 2 second prizes of 300 and 20 third prizes of 10 each If 10000 tickets are sold at 25 cents each find...
- Q A die is rolled 9 times Find the probability of rolling exactly 1 The probability is Round to four decimal places as needed
- Q 1 Suppose that a family has 7 children Also suppose that the probability of having a boy based on the gender assigned at birth is Find the probability that the...
- Q One option in a roulette game is to bet 8 on red There are 18 red compartments 18 black compartments and two compartments that are neither red nor black If...
- Q 1 Suppose that a family has 4 children Also suppose that the probability of having a girl based on the gender assigned at birth is Find the probability that the...
- Q A container contains 6 diesel engines The company chooses 4 engines at random and will not ship the container if any of the engines chosen are defective Find the probability...
- Q survey finds that customers are overcharged by price scanning systems on average on 1 70 of items Suppose a customer purchases 10 items Find th A customer is not overcharged...
- Q A raffle offers a first prize of 500 and 3 second prizes of 80 each One ticket costs 1 and 600 tickets are sold Find the expected payback for a...
- Q hipment of 9 printers contains 3 that are defective Find the probability that a sample of size 3 drawn from the 9 will not contain a defective probability is pe...
- Q probability is P E be an integer or a simplified fraction
- Q Here is a bivariate data set x 1 7 67 5 46 5 12 6 23 9 r y 65 4 173 8 107 4 88 4 80 1 4...
- Q Data for motor vehicle production in a country for the years 1997 to 2004 are given in the table Year 1997 1998 1999 2000 2001 2002 2003 2004 Thousands 1...
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