eeping outlier: A simple random sample of nine college freshmen were asked how many hours of sleep they typically got per night. The results were 8 8.5 9 Send data to Excel 24 6.5 6 9.5 otice that one joker said that he sleeps 24 hours a day. 7.5 7.5
Q: The International Air Transport Association surveys business travelers to develop quality ratings…
A: Obtain the mean and standard deviation of ratings for the random sample of 50 business travelers of…
Q: The researchers from a study interviewed two random samples, one in 2015 and one in 2018. Both…
A: Read a print book 2015 2018 total Yes 1195 1372 2567 No 726 605 1331 total 1921 1977
Q: An assembly line inspector is interested in determining if there is an equal proportion of “Type-A”…
A: Explanation: 1. Since, The inspector is interested in determining if there is an equal proportion of…
Q: Julius has conducted a very small study of the amount of sleep his dorm mates get each night. He…
A: Given: Julius conducted a very small study of the amount of sleep his dorm mates get each night and…
Q: elved are tracked using sortware that can tell the e-mali sender when, where, and on what type of…
A:
Q: (a) Construct a graphical display that represents the association between gender and job experience…
A: In the given scenario, a contingency table was given that contains the categories of job experience…
Q: About 5% of the population has a particular genetic mutation. 100 people are randomly selected. Find…
A: From the provided information,About 5% of the population has a particular genetic mutation that is p…
Q: a. What type of research design was used by the researchers? b. For each variable, identify the…
A: Since you have posted a question with multiple subparts, we will solve first three subparts for you.…
Q: A local Crossfit gym offers a one-month program designed to help customers lose weight. The table…
A: Linear Regression : Regression analysis is used to estimate or predict the dependent variable based…
Q: According to Masterfoods, the company that manufactures M&M's, 12% of peanut M&M's are brown, 15%…
A: Hey there! Thank you for posting the question. Since your question has more than 3 parts, we are…
Q: About 3% of the population has a particular genetic mutation. 100 people are randomly selected.…
A:
Q: For the data given, as the confidence leel increased from 95% to 99% did the margin of error…
A: We have given that a random sample of eye colours collected from a group of 40 MVCC students.
Q: About 9% of the population has a particular genetic mutation. 500 people are randomly selected.…
A: Given that About 9% of the population has a particular genetic mutation. 500 people are randomly…
Q: A biology professor claims that, on the average, 15% of her students get a grade of A, 25% get a B,…
A: The number of categories k is 5.
Q: D what is the variance hr tece following setof scoms? Scones;4,17
A: From the provided information, The scores are as follow: 4, 1, 7
Q: About 10% of the population has a particular genetic mutation. 900 people are randomly selected.…
A: Obtain the mean for the number of people with the genetic mutation in such groups of 900. The mean…
Q: A set of 5 scores has SS = 20. If the scores are from a sample, the sample variance is ____. If the…
A: Given , Sample size n=5 and S.S = 20Sample variance = S.Sn-1=205-1=204=5∴ Sample…
Q: About 8% of the population has a particular genetic mutation. 100 people are randomly selected.…
A: Given that about 8% of the population has a particular genetic mutation. Sample size, n = 100
Q: A student obtained the mean and SD of 100 observations as 40 and 5.1 respectively. It was later…
A: The Variance formula of ungrouped data set is given by Variance σ2=∑xi-x2n…
Q: In a 25-Question multiple-choice, there are five possible answers of which one is correct. Let X:…
A: X=number of correct answers n=number of trials=25 p=probability of success= 1/5 =0.2 [because each…
Q: Suppose Consumer Reports would like to ipvestigate the relationship between the battery life, in…
A: Given: Sr. No. Battery life (y) Screen Size (x) 1 3.4 15.8 2 4.5 17.5 3 4.1 14.4 4 4.4…
Q: A set of 5 scores has SS = 80. If the scores are a sample, the sample variance is ____ and if the…
A: Given,n=5SS=∑(Xi-x¯)2=80 Population variance(σ2)=1n∑(Xi-x¯)2Sample variance(s2)=1n-1∑(Xi-x¯)2and…
Q: An analysis of variance produces SStotal = 80 and SSwithin = 30. For this analysis, what is…
A: From the provided information,
Q: Is there any reason to doubt the expected ration of 9:3:3:1 (the counts above are given in order)?
A: 4) Let ppr is defined as the proportion of purple round, ppw is defined as the proportion of purple…
Q: About 8% of the population has a particular genetic mutation. 200 people are randomly selected. Find…
A: The sample size n is 200 and the proportion of population has a particular genetic mutation (p) is…
Q: Use the following table to answer the question. A random sample of college students was asked to…
A: An event is the outcome of an experiment. The experiment is the study of a subject based on the…
Q: The following dotplot shows the cost of electricity during a summer month for a random sample of 50…
A: Introduction - mean =sum of observations total number of observations Standard deviation…
Q: Julius has conducted a very small study of the amount of sleep his dorm mates get each night. He…
A: Given, Two samples are given, Testing of hypotheses are, H0 : μ1= μ2 There is no significant…
Q: genetic mutation. 800 people are randomly selected. Find the mean for the number of people with the…
A: It is given that P( success ), p = 9% = 0.09Sample size, n = 800
Q: A forester reported the following distribution of tree types to a local logging company. Tree Type…
A: The observed proportion of trees is: Tree Types Spruce Pine Fir Deciduous Others Percent 52%…
Q: If 2% of the components produced by a machine are defective. What is the variance of the number of…
A: According to the question, Number of components, n=300 Probability to be defective p =0.02
Q: Macmillan Learning What population is sampled in this survey? O The population is 100,000 randomly…
A: It is given that In 2010, the Physicians Foundation conducted a survey of physicians attitudes about…
Q: A manager wants to study the employees' absence behaviour in his company. He wishes to find the…
A: (a) Obtain the average number of days an employee absence last year. Use EXCEL Procedure for…
Q: About 9% of the population has a particular genetic mutation. 800 people are randomly selected.…
A: The random variable X denoting the number of people with genetic mutation, follows binomial…
Q: About 9% of the population has a particular genetic mutation. 900 people are randomly selected.…
A: According to the given information, we have Sample size, n = 900 Given that about 9% of the…
Q: A senior accounting major has job offers from four CGA (certified general accountant) firms. To…
A: ANOVA is a hypothesis testing method used to check for the means of the factors are all equal.
Q: A researcher wants to determine if the number of years of education for a parent correlates with the…
A:
Q: A study was conducted to investigate the effectiveness of hypnotism in reducing pain. Results for 8…
A: Given data is fit for paired t-test for testing of hypothesis.
Q: If the variance is 64, then what will be the value of o? a. 4096 O b. 128 O C. 8 O d. 32
A: given variance=64
Step by step
Solved in 4 steps with 6 images
- Read the study below carefully. Then answer the questions that follow by typing in the letter of the correct response. Rhianna hears that watching ASMR videos on YouTube can help with insomnia. She conducts a sleep study on 60 people who have difficulty sleeping by asking a simple random sample of 30 participants to watch at least 20 minutes of ASMR videos prior to sleeping and the remaining 30 participants to attempt to sleep without watching any videos. During the study, the subjects are connected to an EEG machine, which is used to measure brain activity. Rhianna analyzes the EEG results and concludes that those who watched the ASMR videos experienced a better quality of sleep than those who did not. i. Identify the treatments in Rhianna’s study. A. being connected to an EEG machine B. experiencing difficulty sleeping C. watching at least 20 minutes of ASMR videos D. watching at least 20 minutes of non-ASMR videos E. watching no videos prior to sleep F. all…A box contains 5 green and 3 orange balls. If three balls are taken at random with replacements, what is the variance number of orange balls? A. 45/8 B. 15/8 C. 1/8 D. 9/8Researchers asked parents of 19 American children, ages 8 to 12, to complete surveys on the number of hours their children spent reading and the number of hours they spent on screen-based media time. Each of the children also underwent magnetic resonance imaging (MRI) to assess connectivity in the brain. More time spent reading was associated with higher connectivity, while more screen time was associated with lower connectivity in the brains of the children. 1. What is the sample in this study? c 2. What is a possible population? F6 3. Is this an experiment or an observational study? Why did you make that decision? 4. Can we conclude that more time spent reading increases connectivity in children's brains? 5. Identify a possible confounding variable and explain how it meets the definition of a confounding variable. MacBook Air tv♫ F7 * 2 DII F8 ( ZA F9 1 F10 & F11 DOCX A
- Julius has conducted a very small study of the amount of sleep his dorm mates get each night. He believes that those who are on one of the school’s sports teams will get more sleep (measured in hours per night) than those who are not. Julius surveyed 12 people. Of these, 6 played on a sports team and 6 did not. The descriptive statistics from his survey are given below. PLAYS SPORTS (Sample 1) DOES NOT PLAY SPORTS (Sample 2) 8 6 9 6 8 5 7 7 8 7 7 6 What is the critical value for this test? what is the t-obtain value for this t-test? Based on your t-obtained value, what should you conclude about the null hypothesis for this test?A 2012 study of freely forming groups in bars all over Europe examined the natural behavior of groups. The researchers recorded the group size (number of individuals in the group) of all 501 groups in the study that were naturally laughing. The findings were displayed in the figure below. 300 Number of groups 250 200 O 52 O 2.7 0 2 150 3.5 4 100 50 0 254 2 Enter your answer here The median laughter group size in this study is 168 3 The mean laughter group size in this study is O 100.2 Enter your answer here 52 4 5 Laughter group size 21 6 6 Can we conclude from these findings that, in European bars in 2012, smaller groups were more likely than larger groups to be naturally laughing? Explain your statistical reasoning in one sentence.Problem Solving. Solve the following problems. No immediate rounding. Round off final answers to three decimal places. A protective enchantment which alerts the Charms professor when a death eater attacks a magical school is designed to have a 90% reliability rate. Suppose that the nine magical schools equipped with this enchantment experienced an attack from the death eaters. Define the random variable X as the number of Charms professors alerted out of nine. Assuming that protective enchantment alerts are independent 1. Write down the associated PMF of X. 2. Compute for the probability of alerting at least 7 Charms professors.
- A samll town installed a Blue streetlights, in part, to help reduce crime in particular areas. The city collected the number of property crimes along nine randomly selected streets in the month before and after the Blue light installation, and claims that crime has been reduced.The number of crime data is shown in the table. No before Blue Light After Blue Light 1 17 14 2 25 20 3 10 14 4 14 12 5 16 8 6 34 35 7 32 27 8 21 18 9 14 12 a. Specify the competing hypotheses to test the s,all town's claim.b. Calculate the value of the relevant test statistic and find the critical value at the 5% significance level.c. Does the evidence support the small town's claim at the 5% significance level?2. Reporting on cheats What proportion of students are willing to report cheating by other students? A student project put this question to an SRS of 172 undergraduates at a large university: "You witness two students cheating on a quiz. Do you go to the professor?" Only 11% answered "Yes." The dotplot shows the proportion who would go to the professor in each of 1000 random samples of size 172 from a population where 11% would go to the professor. 17 0.1 0.15 0.2 0.25 Simulated sample proportion who would say "Yes" 0 0.05 Distribution of simulated proportion # samples 1000 mean 0.11 SD 0.024 (a) Use the results of the simulation to approximate the margin of error for Gallup's estimate of the proportion of U.S. adults who were satisfied with the way things were going in the United States at the time of the poll. (b) Interpret the margin of error.NEED ANSWER ASAP
- Mr Alsup asked the studentS in his third-and sixth-period English classes whether they had chosen a topic for thier writing assignment. he recorded the data in a two-way table, as shown below English class Yes No Total Third period 24 6 30 Sixth period 22 3 25 Total 46 9 55 if jannette in in mr alsup sixth-period english class what is the probablity that she has not chosen a topic for her writing assignment? a- 3% b- 5% c- 12% d-14%When a student performs poorly on a midterm exam, the student sometimes is convinced that their score is an anomaly and that they will do much better on the final exam. The data below show the midterm and final scores (out of 100 points) for eight students in an introductory statistics class. Student Midterm Final 1 70 88 2 58 52 3 85 84 4 82 74 5 70 80 40 36 7 85 48 8 85 96 a) Construct a scatterplot for the data. Describe the pattern that you see in the scatterplot. Are there any clusters or outliers? If so, how would you explain them? b) Calculate the regression line for predicting a student's score on the final exam based on the student's score on the midterm.Is there an association between hair color and body type? The table below shows the results of a researcher's observations of randomly selected people. Frequencies of Hair Colors for Various Body Types Blonde Brunette Red Head 71 80 96 108 55 115 46 91 Short and Slender Short and Pudgy Tall and Slender Tall and Heavy What can be concluded at the o= 0.01 significance level? 53 74 69 63