A poll reported that 63​% of adults were satisfied with the job the major airlines were doing. Suppose 20 adults are selected at random and the number who are satisfied is recorded. Would it be unusual to find more than 17 who are satisfied with the job the major airlines were​ doing?   The result is/is not​ unusual, because P(x>17​) = _____ under the assumption that the proportion of adults that are satisfied with the airlines is 63​%. Thus, in 100 random samples of size 20​, this result is expected in about ______ of the random samples. ​(Type integers or decimals. Round to four decimal places as​ needed.)

Q: Suppose that the grades in a statistics class are described by N(75,5). Use statkey to determine the…

A: Given, Mean =75 Standard deviation 5

Q: In a blind taste test, people were given four different types of water and asked to select their top…

A: It is given that, 10 participants selected tap water. 25 participants selected Aquafina. 41…

Q: 6.2.6 In a survey of introductory statistics students, an in- structor asked her students to report…

A: We have to answer the question based on number of facebook friends and sex of person

Q: In order to gain more insight on-employee’s preferences, twenty-three (23) employees from the…

A:

Q: If all the possible random samples withn 36 scores are selected from a normal population with u- 80…

A: sample mean=E(X¯)=E∑i=1nXi/n=∑i=1nμn=nμn=μsample mean=μ=80

Q: Are Republicans less likely than Democrats to display the American flag in front of their residence…

A:

Q: A travel agency is interested if there is a difference in preference for U.S. city as a favorite…

A: Answer H0: There is not significant difference in preference toward favorite U.S. cities to…

Q: A political analyst believes that a recent to support a in a senator's decision bill resulted drop…

A: Here, the claim is, senator’s recent decision to support a bill resulted in a drop of approval…

Q: Nine students have been chosen to take part in a study. Each student will be taught statistics by…

A: Given information: x¯d=-5.00sd2=77.0n=9α=.10

Q: Recently, a nurse commented that when a patient calls the medical advice line claiming to have the…

A: Givensample size(n)=25p=4%=0.04

Q: Q9. What is the probability that a randomly chosen number among these data points is between 95 &…

A: Given that, Total number of data values nS=16

Q: A researcher is interested in examining whether the location that a person lives is related to the…

A: Given Total number of people = 30  Divided them into 3 groups  Urban , suburban , rural  Each group…

Q: Suppose you are asked to carry out a 1-in-k systematic random sample of students from a local…

A: Solution:  Given information: N= 800 Population size n= 12 Sample size

Q: 1000 persons of London were asked by a B.B.C. investigator to give the nationality of the music they…

A: According to addition rule the total number of unique elements in 3 events is given by the formula…

Q: Suppose that a survey of randomly chosen people revealed that • 40% of the people like broccoli 30%…

A: According to the given information,40% of the people like broccoli. That is, P(B) = 40% = 0.4030% of…

Q: Birth Position 1st 2nd 3rd 16 Outgoing 13 Reserved 17 31 19 4

A: Given,   Birth Position     1st 2nd 3rd Total Outgoing 13 31 16 60 Reserved 17 19 4 40…

Q: A researcher is interested in the relationship between birth order and personality. A sample of n =…

A: The question is about categorical data analysisGiven :To find :Is there a significant relation…

Q: In a driver-side "star" scoring system for crash-testing new cars each crash-tested car is given a…

A: The table shows the drivstar, count and percent.

Q: Lout lin ne tim

A:

Q: Suppose the weights (in pounds) of eight rowers on each of the Cambridge and Oxford crew teams are…

A: To test the hypothesis that the mean weights of the populations of rowers on the Cambridge and…

Q: A researcher studying public opinion of proposed Social Security changes obtains a simple random…

A:

Q: A researcher wishes to determine if there is a relationship between residence and approval of some…

A: The following information has been provided:   Favor Oppose Urban 164   134   Suburban…

Q: Mean = 0.170 SD = 97.891 40 80 120 160 200 -400 -200 200 400 Shuffled differences in means h. On the…

A:

Q: This past February1 a survey of n-Canadians between the ages of 18 and 34 years of age. The finding?…

A: The proportion of all Canadians between the age of 18 and 34 years of age who admit to having…

Q: A survey shows that 64% of American teenagers want to be eventually be self-employed. A simple…

A: Given that 64% of American teenagers want to be eventually be self-employed and a simple random…

Q: political analyst believes that a senator's recent decision to support a bill resul aim, he selects…

A: If the same subject is measured before and after conducting some treatments then the paired t-test…

Q: A real estate agent believes that the values of houses in the neighborhood she works in have…

A: Hypothesis:Hypothesis is an assumption about the parameter of the population which will be made on…

Q: A real estate agent believes that the value of houses in the neighborhood she works in has increased…

A: It is given that the alterative hypothesis is as follows: Ha : µd > 0, the t test statistic is…

Q: d. Which of the following is the appropriate null hypothesis? Circle one. A. There is an association…

A: The claim is to check whether there is an association between number of Facebook friends and a…

Q: The critical value is:…

A: Given:   Birth position     1st 2nd 3rd Total Outgoing 13 31 16 60 reserved 17 19 4 40…

Q: Suppose that a certain paper included the accompanying data on the tar level of cigarettes smoked…

A: The expected values are 303.5 for each of the four cells. The test statistic is,…

Q: pearance in a member of the of Fomen replying in the affirmative in general, a greater percentage…

A: Given : x1= 412 n1= 500 x2= 298 n2= 519 significance level, 0.01

Q: Determine this mean number of points x, earned on the test.

A: A sample of 30 students at a local college were given a test consisting of 10 questions about…

Q: In a study, it was found that 42.5% of the population drink soda at least once a day. You randomly…

A: It is an important part of statistics. It is widely used.

Q: Suppose that 6% of a particular population have a particularly nasty disease. There is a test for…

A: Note:- Since you have posted a question with multiple subparts we will provide solutions only to the…

Q: A researcher is interested in the relationship between birth order and personality. A sample of n=…

A: Given, Birth position  1st 2nd 3rd Total outgoing 13 31 16 60 Reserved 17 19 4 40 Total 30…

Q: his graph shows data from people from the sub-Saharan area of Africa who have contracted HIV.…

A: Given the graph shows data from people from the sub-Saharan area of Africa who has contracted HIV.

2-Proportion Test

In a 2-proportion test, two separate proportions are measured at the same time, and their similarity is evaluated. It is also known as a 2-proportion z-test, and a comparison of two different proportions is done in this method.