Statistics question and answers for December 30, 2023
- Q Giving a test to a group of students the grades and shirt colors are summarized below A B Red Shirt 19 3 Blue Shirt 14 2 C Total 35 33...
- Q Every cereal box has a gift inside but you cannot tell from the outside what the gift is The store manager assures you that 13 of the 60 boxes on...
- Q Calculate the 45th percentile of the data shown X 5 8 9 14 6 14 8 16 5 19 2 19 9 21 1 24 5
- Q 67 Determine which of the following are true and which are false Then in complete sentences justify your answers a When the sample size is large the mean of X...
- Q Here is a data set 89 63 58 51 54 51 63 57 75 64 62 68 60 84 85 67 52 71 67 57 73 57 67 65 68...
- Q Sales 8 7 6 5 4 3 2 1 Wed Thur Q The plot above shows the number of computers a store sold the first four days of this wee...
- Q 72 Which of the following is NOT true about the theoretical distribution of sums a The mean median and mode are equal b The area under the curve is one...
- Q that oration Phi Delta Kappa PDK is an international professional organization for edu Gallup has been conducting polls on the public s attitudes toward the public schools since 1969 The...
- Q Write the given number using prime factorization Write your answer using Exponential Notation For instance 98 2 7 2 Instructions Find the prime factorization of 6
- Q Events A and B are independent if the occurrence of one does not affect the probability of the other occurring This statement is best represented in symbols by OP A...
- Q Enter the prime factorization of 77 Use exponents for repeated factors Be sure to use the between different factors For example the pr factorization for 12 can be entered as...
- Q Events A and B are mutually exclusive if they can not occur simultaneously This statement is best represented in symbols by P A and B 0 A given B 0...
- Q Sara draws the 7 of hearts from a standard deck of 52 cards Without replacing the first card she then proceeds to draw a second card a Determine the probability...
- Q Let P U 0 15 and P V 0 44 Events U and V are mutually exclusive Find P U or V O 0 59 O 0 29 O 2...
- Q Two dice are rolled What is the probability P sum is 3 OO 11 18 1 12 1 18 19 36
- Q Table Frequencies by grades and shirt color Shirt Color A B Blue Shirt 20 10 Red Shirt Total C 4 7 3 11 27 13 15 Total 34 21 55...
- Q 64 Suppose that a category of world class runners are known to run a marathon 26 miles in an average of 145 minutes with a standard deviation of 14 minutes...
- Q 65 The length of songs in a collector s online album collection is uniformly distributed from 2 to 3 5 minutes Suppose we randomly pick five albums from the collection...
- Q Here is the probability model for the blood type of a randomly chosen person in the United States Blood type 0 A B AB Probability 0 49 0 17 0...
- Q Events A and B are mutually exclusive if they can not occur simultaneously This statement is best represented in symbols by OA given B 0 OP A B 0 OP...
- Q There are 13 freshmen and 16 sophomore students in a classroom We randomly select two students Suppose the students were selected with replacement a If the first student was a...
- Q Let P U 0 3 and P V 0 34 Events U and V are mutually exclusive Find P U or V O 0 102 O 0 04 O 0...
- Q A certain virus infects one in every 600 people A test used to detect the virus in a person is positive 90 of the time if the person has the...
- Q The length of time it takes to find a parking space in a certain city at 9 A M follows a normal distribution with a mean of five minutes and...
- Q Which of the following scenarios represent random sampling without replacement 1 We visit a farmer s market and ask a vendor for four pears from a crate The vendor picks...
- Q A poll showed that 58 4 of Americans say they believe that Marilyn Monroe had an affair with JFK What is the probability of randomly selecting someone who does not...
- Q 62 Suppose that the distance of fly balls hit to the outfield in baseball is normally distributed with a mean of 250 feet and a standard deviation of 50 feet...
- Q A company that makes cartons finds that the probability of producing a carton with a puncture is 0 05 the probability that a carton has a smashed corner is 0...
- Q The length of time it takes to find a parking space in a certain city at 9 A M follows a normal distribution with a mean of five minutes and...
- Q A Manufacturing and the life times distribution with to set wants Only 2 of 2 of the bulbs what should hours period Period Company Produces light bulbs of these bulbs...
- Q You may need to use the appropriate appendix table to answer this question According to Money magazine Maryland had the highest median annual household income of any state in 2018...
- Q Step 3 The probability statement was determined to be P z 2 Recall that the normal probability table gives the area under the curve to the left of a given...
- Q We found P z 0 53 0 7019 and P z 1 21 0 8869 Subtract the smaller area from the larger area to find the requested probability P 0...
- Q The probability statement was determined to be P z 0 36 Recall that the normal probability table below gives the area under the curve to the left of a given...
- Q Converting an hour to minutes the probability of completing the exam in an hour or less is P x 60 Before finding this probability the random variable x needs to...
- Q The average starting salary of this year s MBA students is 55 000 with a standard deviation of 5 000 Furthermore it is known that the starting salaries are normally...
- Q Use the table excerpt above to find the area under the standard normal curve to the left of z 0 46 P z 0 46 P z 0 46 0...
- Q b What is the probability that a Dutch male is taller than 194 cm Round your answer to four decimal places You may need to use the appropriate appendix table...
- Q You may need to use the appropriate appendix table to answer this question The average return for large cap domestic stock funds over three years was 14 4 Assume the...
- Q You may need to use the appropriate appendix table to answer this question Given that z is a standard normal random variable find z for each situation Round your answers...
- Q Stop We found P Z 1 95 0 0256 and P z 0 46 0 6772 Subtract the smaller area from the larger area to find the requested probability P...
- Q 0 3 12 Points 0 66 0 60 0 60 0 66 You may need to use the appropriate appendix table or technology to answer this question Given that z...
- Q You may need to use the appropriate appendix table or technology to answer this question Given that z is a standard normal random variable compute the following probabilities Round your...
- Q Before finding this probability the random variable x needs to be converted to the normal random variable z so that a table of probabilities can be used Recall the formula...
- Q DETAILS ASWSBE14 6 E 022 MY NOTES ASK YOUR TEACHER You may need to use the appropriate appendix table to answer this question Suppose that the mean daily viewing time...
- Q will be for a range of values and represented by the area under the graph between the values The desired probability is for the region between z 1 95 and...
- Q You may need to use the appropriate appendix table or technology to answer this question Given that z is a standard normal random variable what is the value of z...
- Q You may need to use the appropriate appendix table to answer this question Given that z is a standard normal random variable compute the following probabilities Round your answers to...
- Q According to a survey 54 of the residents of a city oppose a downtown casino Of these 54 about 8 out of 10 strongly oppose the casino Complete parts a...
- Q You may need to use the appropriate appendix table or technology to answer this question z is a standard normal random variable What is the value of z if the...
- Q The following data were collected by counting the number of operating rooms in use at Tampa General Hospital over a 20 day period On four of the days only one...
- Q The probability that a person in the United States has type B blood is 8 Three unrelated people in the United States are selected at random Complete parts a through...
- Q In this question we will formulate a measure to quantify the level of association between the two categorical variables Such a measure is often used in a statistical test called...
- Q 3 Points DETAILS Consider the experiment of a worker assembling a product a Define a random variable that represents the time in minutes required to assemble the product Let x...
- Q Select True or False from each pull down menu depending on whether the corresponding statement is true or false 1 If a sample has 18 observations and a 90 confidence...
- Q Odiscrete c Audit 40 tax returns random variable x number of returns containing errors Identify the values that the random variable can assume O 0 1 2 O 0 1...
- Q c Compute o the standard deviation of x Recall that the standard deviation is the positive square root of the variance That is o 2 The variance was found to...
- Q A random sample of 13 size AA batteries for toys yield a mean of 3 37 hours with standard deviation 1 16 hours a Find the critical value t for...
- Q Katie thinks that people living in a rural environment have a healthier lifestyle than other people She believes the average lifespan in the USA is 77 years A random sample...
- Q Use the frequency distribution which shows the number of American voters in millions according to age to find the probability that a voter chosen at random is in the 18...
- Q Therefore the monthly order should be 435 Step 3 b Assume that each unit demanded generates 65 in revenue and that each unit ordered costs 50 How much will the...
- Q The access code for a car s security system consists of four digits The first digit cannot be 2 and the last digit must be even How many different codes...
- Q b Compute o the variance of x The variance o2 of a probability distribution is used to describe the spread of the values of the random variable The formula for...
- Q The probability distribution for the random variable x follows X 20 0 25 25 0 15 30 0 20 35 0 40 a Is this probability distribution valid Explain Since...
- Q Step 1 a Compute E x the expected value of x The expected value of a random variable is a measure for the central location Thus the expected value of...
- Q 300 400 400 500 Unit Demand Probability X f x 500 600 Here the random variable x is represented by the unit demand 600 Step 2 The random variable x...
- Q The following table provides a probability distribution for the random variable y y f y 2 0 30 7 0 10 0 40 8 0 20 a Compute E y...
- Q New legislation passed in 2017 by the U S Congress changed tax laws that affect how many people file their taxes in 2018 and beyond These tax law changes will...
- Q A psychologist determined that the number of sessions required to obtain the trust of a new patient is either 1 2 or 3 Let x be a random variable indicating...
- Q 2 I surveyed each house on the block to determine how much we are spending on Halloween treats The distribution below represents the results in dollars Spent mid 50 59...
- Q 3 Costco sells paperback books in their retail stores and wants to examine the relationship between the prices and sales The price of a particular novel was adjusted each week...
- Q The lengths of a particular animal s pregnancies are approximately normally distributed with mean 276 days and standard deviation o 16 days a What proportion of pregnancies lasts more than...
- Q Steel rods are manufactured with a mean length of 22 centimeter cm Because of variability in the manufacturing process the lengths of the rods are approximately normally distributed with a...
- Q The time required for an automotive center to complete an oil change service on an automobile approximately follows a normal distribution with a mean of 19 minutes and a standard...
- Q The number of chocolate chips in an 18 ounce bag of Chips Ahoy chocolate chip cookies is approximately normally distributed with a mean of 1262 chips and a standard deviation...
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