13. In a survey about the safety of air travel, 69% of the 1044 surveyed from the United States said that they consider air travel to be safe. a) Define p and p for this problem. Which is the one that we will estimate a confi- dence interval? Which is the one that we know from the survey and what is it? b) Find a 95% confidence interval for the population proportion of people that think U.S. air travel is safe. c) From this survey, can we be 95% confident that the majority of people think that U.S. air travel is safe?

Q: A magazine reported that at the top 50 business schools in a​ region, students studied an average of…

A: According to the given information in this question We need to identify the null hypothesis and…

Q: A consumer products testing group is evaluating two competing brands of tires, Brand 1 and Brand 2.…

A: From the provided information, Sample size (n) = 8 The difference table is as follow: Difference…

Q: A​ state-by-state survey found that the proportions of adults who are smokers in state A and state B…

A: Consider p1 as the proportion of adults who are smokers in state A and p2 as the proportion of…

Q: A researcher asked 35 participants (N = 35) to rate their level of life satisfaction on a 7-point…

A: Given that :- A researcher asked 35 participants (N = 35) to rate their level of life satisfaction…

Q: Given the information, fill in the blanks

A:

Q: 26. The acidity or alkalinity of a solution is measured using pH. A pH less than 7 is acidic; a pH…

A: Given data Tap Water: 7.64 7.45 7.47 7.50 7.68 7.69 7.45 7.10 7.56 7.47 7.52 7.47 Bottled…

Q: If, in a sample of n=20 selected from a normal​ population, X=53 and S=8​, what are the…

A:

Q: 5) How many five digit numbers are there that start and end with an odd digit and also the middle…

A:

Q: Share and discuss in general the use and misuse of statistics in our day to day lives.

A: HEALTH MANAGEMENT In this pandemic time of covid-19, statistics is used widely. If we need to…

Q: What is the variance of the small DATA: 7, 13, 5, 9, 16 a. 4.47

A: The data is given as follows 7 13 5 9 16

Q: 3. A television cable company receives numerous phone calls throughout the day from customers…

A: Let X be the length of time a caller is on hold.  It is given that X~N(3.1,9) Also it is mentioned…

Q: Lombard Electronics Company has just installed a new machine that makes a part that is used in…

A:

Q: A study is conducted to determine the relationship between a driver’s age and the number of…

A: For the given data,  We have to calculate  Correlation coefficient and value of a and b from…

Q: At one college, GPA's have a distribution that is unimodal and symmetric with a mean of 2.6 and a…

A: Since the distribution is unimodal and symmetric with a mean hence it is normal distribution with…

Q: student scored 65 on a Statistics exam that had a mean of 50 and a standard deviation of 10; she…

A: A student score on statistic exam X=65 from a distribution with mean 50 and standard deviation 10…

Q: 7. The ne idle loping problem as about 10 per cent of the Tigercats have an unstable fluctuating…

A: Given: Total cars n=100 Defect probability is 10%

Q: Find the p-value (decimal rounded to nearest 4 places) A company claimed that more than 75% of…

A:

Q: I need help with parts C, D, and E.

A: (c) To develop the estimated regression equation that could be used to predict the price given the…

Q: A school principal claims that the number of students who are tardy to school does not vary from…

A:

Q: variance.

A: Given information: X ~ Normal distribution P (X ≤ 66) = 0.0421 and P (X ≥ 81) = 0.1298

Q: a) The probability of the first serve is good for a tennis player is donated by p. A player decides…

A:

Q: Assume that adults have IQ scores that are normally distributed with a mean of 101.4 and a standard…

A: Mean(µ) = 101.4Standard deviations (σ) = 18.7X ~ N (µ, σ )= N(101.4, 18.7)

Q: . A pharmaceutical company conducted a study to test the effectiveness of its new antidepression…

A:

Q: An investigation of the cases in the 15-19-year age group revealed that 22 of the reported cases…

A: Epidemiology

Q: 1. c) southwestern variable. True False The daily fuel consumption by a fleet of buses serving a…

A: Here we have to check whether given statement is true or false  " The daily fuel consumption by a…

Q: Find the value of ZQ 20.23 20.23=

A: Givenz0.23=

Q: Let Y ∼N(μ,1) for μ unknown. Use the fact that P(|Y −μ|< 1.96σ) ≈0.95 to construct a random interval…

A: see the attachment............

Q: answers

A: Given Data:

Q: The following data give the percentage of women working in five companies in the retail and trade…

A: (C)  Many different straight lines can be drawn to provide a linear approximation of relationship…

Q: Why is 150 x 298 if one couple has been chosen? Shouldn't it be 149 x 298, since one couple has been…

A: here the total number of couples =150 Total number of people =300 number of people in one team =3

Q: You wish to test the following claim (Ha) at a significance level of α=0.02. For the context of this…

A: The following data has been provided: pre-test post-test 74.9 134.9 52.4 139.2 50.6 91…

Q: for the 20 individuals

A: The rate table is given as,   Ate Ate Ate Not ate Not ate Not ate Menu Total Became ill Rate %…

Q: The graph below shows five black bars. Adjust the light bar so that it has the mean height of the…

A: From the given diagram, the y axis (frequency) ranges from 0 to 15. The frequency of the first bar…

Q: Participants A B C D E F G X 4 7 8 6 9 8 7 Y 70 86 90 75 85 81 73

A: Given : Sample size (n) = 7 Participants X Y A 4 70 B 7 86 C 8 90 D 6 75 E 9 85 F 8…

Q: mean of the sample means is ten and the computed values for the UCL and espectively. Below is the…

A: sample mean 1 9 2 11 3 6 4 12 5 9 6 11 7 7 8 8 9 12 10 16 11 6 12 13 13 12…

Q: A certain species of tree has an average life span of 130 years. A researcher has noticed a large…

A: Given: n = 27 μ = 130 Years. Formula Used: Test-statistic t = X - μsn

Q: DDonuts claims that the waiting time of customers for service is normally distributed with a mean of…

A: Parametric test are one of the hypothesis test. It used to make conclusion about the larger…

Q: QUESTION 4 (LINEAR REGRESSION) Based on the image attached, shows the results of one data…

A: X:24,35,64,20,33,27,42,41,22,50,36,31  Y:90,65,30,60,60,80,45,45,80,35,50,45

Q: Sales Representative Actual Sales, Y 30 60 40 60 30 40 40 50 30 70 ABCDEFGH с D I J Estimated Sales,…

A: Given : Sales Representative Actual Sales , Y Estimated Sales, Y' A 30 42.6316 B 60 66.3156…

Q: Problem 5 Two process A and B are used a supplier to produce the same product. The specifications of…

A: ProbabilityProbability is that the branch of mathematics concerning numerical descriptions of how…

Q: Amount 20.50 14.63 23.77 29.96 29.49 32.70 9.20 20.89 28.87 15.78 18.16 12.16 11.22 16.43 17.66 9.59…

A: Given : Sample size (n) = 64 Population SD (σ) = 15 Confidence level = 99% So , significance level…

Q: Given: The table below shows the scores on a Chem 103 test consisting of 10 questions worth 10…

A: Table are used to consolidate the larger number of data set. Table shows the similarity and…

Q: Using pairwise comparison between P and R, what is the score of R? No. of Votes 14 10. 8. 4. 1 1st…

A:

Q: hours of sleep (y) 8 8 7 7 5 6 6 6 est the significance of the correlation coefficient at 0.05 level…

A: x y age hours 8 8 15 8 22 7 27 7 34 5 40 6 20 6 25 6 41 8 15 7 36 5

Q: Reuben is a human resources executive for a technology company. He is deciding between two types of…

A: From the provided information,

Q: What is the Standard Deviation and the Percentage that falls within the 1 Distance of Standard…

A: N=30 for the given data  First we will calculate mean  We have to calculate standard deviation and…

Q: subjects.

A:

Q: A simple random sample of size n is drawn from a population that is normally distributed. The sample…

A: It is given that Sample size n = 21, 12 Sample mean M = 114 Sample SD s = 10 Level of confidence =…

Q: isted below are the salaries of ten instructors in a particular college. $88516 $75264 $74861…

A: Given : Sample size (n) = 10 Confidence level = 95% So ; significance level (α) = 5%=0.05…

Q: Calculate Q1, Q2, Q3, D1, D4, D5, D7, P10, P25, P50 and P70 for the following IQ scores: 87 90 95 96…

A: The total observation (score) present here is 23. Therefore, the size N is 23. The given…