Statistics question and answers for January 16, 2024
- Q A student took five exams in a course last semester The scores are shown below 84 95 94 96 90 Calculate the mean variance and standard deviation Round to 4...
- Q A teacher surveys 39 of the current 344 enrolled students at a local college What is the size of the sample What is the size of the population
- Q Find the width between the interval 6 7
- Q The useful life of a bicycle bought at Basement mart fits a log normal distribution with a mean of 15 months and a standard deviation of 13 92 months Suppose...
- Q There are 84 shoppers in the market a salesperson surveys 35 peop What is the size of the population What is the size of the sample
- Q A particular fruit s weights are normally distributed with a mean of 321 grams and a standard deviation of 26 grams If you pick 20 fruits at random then 10...
- Q Suppose that the value of stock varies each day from 14 to 25 with a uniform distribution Find the 20th percentile O2 2 O 14 2 O 22 8
- Q Which of the following is NOT a characteristic of the chi square distribution The mean of the chi square distribution is located to the left of the peak The chi...
- Q In a survey of 356 people who attended a local professional soccer team s most recent home game 135 said that they were fans of the visiting team Create a...
- Q The following data was calculated during a study on weight loss Interpret the p value for this hypothesis test A doctor would like to test the claim that the average...
- Q A health and fitness club reviews the weights of all of their members and found that the average weight was 148 lb Is this value a statistic or a parameter...
- Q A test consists of 10 multiple choice questions each with five possible answers one of which is correct To pass the test a student must get 60 or better on...
- Q A manager wishes to determine the relationship between the number of miles in hundreds of miles the manager s sales representatives travel per month and the amount of sales in...
- Q superintendent of a school district wants to understand the link between tendance and grade point average or GPA The GPA is out of 4 0 points with 0 being the...
- Q A nurse at a local hospital is interested in estimating the birth weight of infants How large a sample must she select if she desires to be 99 confident that...
- Q A researcher claims that 62 of voters favor gun control Assuming that a hypothesis test of the claim has been conducted and that the conclusion is failure to reject the...
- Q The distribution of cholesterol levels in teenage boys is approximately normal with m 170 and s 30 Source U S National Center for Health Statistics Levels above 200 warrant attention...
- Q With 95 confidence interval and n 12 Find right critical value for Zinterval O2 201 O 1 796 01 96
- Q Hypothesis testing concepts For a test of Ho p 0 60 the test statistic is determined to be z 2 11 a If the alternative hypothesis is Ha p 0...
- Q Test the claim that the mean GPA of night students is smaller than 3 5 at the 0 10 significance level The null and alternative hypotheses would be Ho 3...
- Q In a poll Australians were asked if they thought unemployment would increase At that time 284 out of 605 said that they thought unemployment would increase Estimate the proportion of...
- Q K The acceptable level for insect filth in a certain food item is 3 insect fragments larvae eggs body parts and so on per 10 grams A simple random sample...
- Q Assume that the heights of of adult males in a certain region are normally distributed The heights in inches of 20 randomly selected adult males from this region are listed...
- Q The recommended hours of sleep per night for adults is 8 hours A doctor who works at a sleep study facility believes the average number of hours of sleep per...
- Q An economist wondered if people who go to the movies on weekdays go more or less often on Fridays than any other day She figured that if it were truly...
- Q According to a recent study the mean number of hours college students spent studying per month was 75 hours with a population standard deviation of 25 hours Two weeks before...
- Q Suppose that the delivery times for a local pizza delivery restaurant are normally distributed with an unknown mean and standard deviation A random sample of 24 deliveries is taken and...
- Q he pages per book in a library are normally distributed with an unknown opulation mean A random sample of books is taken and results in a 95 confidence interval of...
- Q The diameters of apples from a certain farm follow the normal distribution with mean 4 inches and standard deviation 0 4 inch Apples can be size sorted by being made...
- Q In a large city s recent mayoral election 131 506 out of 309 153 registered voters actually turned out to vote If 20 registered voters are randomly selected find the...
- Q A basketball player has a 0 654 probability of making a free throw If the player shoots 13 free throws what is the probability that she makes less than 6...
- Q The amount of time it takes Emma to wait for the train is continuous and Uniformly distributed between 4 minutes and 11 minutes What is the probability that it take...
- Q A casino features a game in which a weighted coin is tossed several times The table shows the probability of each payout amount To the nearest dollar what is the...
- Q The city council conducts a survey of the city s residents to determine which services are most used by the community 60 of the residents say that they use the...
- Q Suppose A and B are mutually exclusive events and that P A 0 13 and P B 0 85 Find P A or B 0 98
- Q Sarah has two tests at school next week a math test and a physics test Let A represent the event that she passes her math test and B represents the...
- Q The owner of a radio station wants to determine how much airtime songs take up The owner collects the song length in seconds of 10 population songs The data are...
- Q 34 According to a recent report customers who shop at a certain online store spend on average 1 500 a year at the store To investigate whether the mean amount...
- Q estion 6 Dollar General has increased their number of stores tremendously over t decade In 2020 there were 17 266 Dollar General stores this total was up 30 from the...
- Q Statistics students believe that the mean score on a first statistics test is 65 The instructor thinks that the mean score is higher She samples 10 statistics students and obtains...
- Q Hypothesis testing concepts For a test of Ho p 0 60 the test statistic is determined to be z 2 11 a If the alternative hypothesis is Ha p 0...
- Q Part 1 o A sociologist claims the probability that a person picked at random in Times Square in New York City is visiting the area is no less than 0...
- Q A scientist claims that in a population of fish at least 54 are female A test is conducted to test the claim Identify the null hypothesis Ho O 0 0...
- Q Ho p 0 84 H p 0 84 Your sample consists of 51 subjects with 45 successes Calculate the test statistic rounded to 2 decima places Z
- Q Many people feel that cereal is healthier alternative for children over glazed donuts The table contains the amount of sugar in a sample of cereal that is geared towards children...
- Q Continuous is the type of quantitative data that is the result of measuring O True False
- Q A random sample of house sizes in major city has a sample mean of 1204 9 square feet and a sample standard deviation of 124 6 square feet Use the...
- Q For a confidence level of 99 with a sample size of 14 find the critical t value
- Q For a confidence level of 96 find the critical value
- Q A data set list the number of olives on each pizza ordered in the last few hours at a pizza shop For this data set the minimum is 4 the...
- Q Suppose you compute a 99 confidence interval What will happen to the confidence interval if you change the confidence level to 95 The confidence interval will become Select an answer...
- Q When considering different sampling methods cluster sampling includes the steps O Identify individuals of the poulation that are easily accessible obtain data from these individuals O list the members of...
- Q Timothy wants to estimate the mean number of siblings for each student in his school He records the number of siblings for each 75 randomly selected students in the school...
- Q According to a study conducted by a statistical organization the proportion of people who are satisfied with the way things are going in their lives is 0 74 Suppose that...
- Q On each blank below write in the probability that corresponds to the problem number in the tree diagram 1pt each 12 0 68 13 0 32 15 044 16 0...
- Q Match each term with the correct definition given on the right 1 pt ea 1 Probability 2 Mutually Exclusive 3 Conditional Probability 4 Independent 5 Complement Rule 6 In 2014...
- Q 10 What is the probability that Curry attempted a shot at the rim given that he made the shot 2 pts USE PROBABITY NOTATION 11 If a shot taken was...
- Q Rate 2 1 3 4 6 5 below a Calculate the coefficient of correlation r 2 sses the unemployment rate decreases Please note that this data is graphed b Using...
- Q A group on campus will make and sell bracelets to benefit a charity The profit from selling the bracelets will go to the charity The group members are trying to...
- Q 4 In the bottom of the ninth inning in a tie game the leadoff batter for the home team hits a double According to researcher Tom Tango teams in this...
- Q Part 2 Development issues Write your answer to the development questions in the space provided below clearly specifying your rating and including an appropriate justification Show all the details of...
- Q 4 The one child policy is an official program launched in the late 1970s by the Chinese central government with the aim of limiting the number of children per family...
- Q 2 Many baseball pitchers can throw 3 different types of pitches fastball curve and change up A certain pitcher throws his fastball 55 of the time curveball 30 of the...
- Q i 1 In 2018 quarterback Drew Brees had the highest statistical passer rating of any quarterback in the NFL The two way table summarizes the association between the quarter of...
- Q Question 22 Which of the following could be the value of x if x 2 A B C D WSSISIWNIH q S x 29 9 9 5 9 x 18
- Q Question 15 What is 0 8749 rounded to the nearest hundredth have A 0 87 B 0 875 C 0 88 D 0 884 tenths hundredths thou
- Q When 40 of 60 is added to 12 of 600 the resulting number A 24 B 72 C 96 D 140
- Q Section 1 Arithmetic Question 7 Bob deposits 20 of 140 into a savings account what is the amount of his deposit Q 10 T R 16 S 20 T 28
- Q The perimeter of the trapezoid below is 42 cm What is its area A 576 cm B 112 cm C 48 cm D 24 cm 2 6 cm 12 cm...
- Q In a stadium the ratio of home fans to visiting fans in a crowd is 11 1 Which of the following could be the total number of fans in the...
- Q A football team had 20 000 to spend on supplies The team spent 15 000 on new balls New sport shoes cost 140 each Which of the following inequalities represent...
- Q Section 1 Arithmetic Question 12 15 of what number is equal to 90 A 8 64 B 36 C 300 D 600
- Q Ion 18 What is 720 756 rounded to the nearest hundredth A 720 B 720 75 C 720 76 D 721
- Q Question 28 If 4x y 25 and x 2z 24 what is the value of x A 0 B 5 C 10 D It cannot be determined from the information...
- Q If 60 of x equal to 30 of 20 then what is the value of x 5 A 25 25 B 26 C 26 01 D 225
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