A medical doctor claims that 40% of the patients utilize health insurance, but a social worker thinks that this proportion may be is too high. In a sample of 12 medical bills, 4 were partially covered by health insurance, what can we conclude at 0.05 level of significance. What is the summation of x and decision

Q: A certain university claims that for the last school year the proportion of students who were not…

A: Given, A certain university claims that for the last school year the proportion of students who were…

Q: udy by estigate whether this result applies to its own product, the manufacturer of a national…

A: We have given that  Population proportion p=64%=0.64 Sample size n =100 Favorable cases x =52 Sample…

Q: A doctor claims that less than 30% of all persons exposed to a certain amount of radiation will feel…

A:

Q: An independent research group is interested in showing that the percentage of babies delivered…

A:

Q: The Old Farmer’s Almanac stated that the average consumption of water per person per day was 123…

A: Given:               Hypothesis :                                 Under The null hypothesis, the…

Q: A sample of n = 81 scores is obtained from a population with µ = 80 and σ = 27. If the sample mean…

A: Given that, Sample size, n = 81 Z score = +2.33 μ=80 and σ=27

Q: A medical doctor claims that 40% of the patients utilize health insurance, but a social worker…

A:

Q: 2. A decade-old study found that the proportion, p, of high school seniors who believed that…

A: Given that,possible chances (x)=165sample size(n)=240success rate ( p )= x/n = 0.6875success…

Q: n automobile owner found that 20 years ago, 74% of Americans said that they would prefer to purchase…

A:

Q: Among college students, the proportion p who say they're interested in their congressional…

A: The random variable interest rate follows normal distribution. We have to test whether the…

Q: A physicist claims that the average wind speed in a certain city is 8 miles per hour. A sample of 33…

A: We have given that Population mean (µ) = 8Population Standard deviations (σ) = 0.6Sample size (n) =…

Q: city official claims that the proportion of all commuters who are in favor of an expanded public…

A: Given :  Claim : The proportion is different from 50%

Q: A multinational firm hired a consultant to determine if the workers in their domestic plants were…

A: Given Information : A multinational firm hired a consultant to determine if the workers in their…

Q: 187 families have health insurance out of a random sample of 292 families. Kaiser states that the…

A: (c) To find the critical value use invNorm(). (d) From the information, the hypotheses test for…

Q: In a recent poll, 450 people were asked if they preferred cats or dogs. 52% said they preferred dogs…

A: Given data: n = 450  52% said they preferred dogs and 48% of people said they preferred cats, with a…

Q: A medical researcher says that less than 74​%of adults in a certain country think that healthy…

A: It is given that n is 600 and p hat is 0.71.

Q: Among college students, the proportion p who say they're interested in their congressional…

A: Given X=185 n=260

Q: llowing scores after 5 games: 196, 205, 197, 280 and 202.How much does the bowlers mean score…

A: Given: Score: 196, 205, 197, 280 and 202 Here, the outlier is 280. First of all mean with outlier:…

Q: A statistics instructor believes that more than 20% of Evergreen Valley College (EVC) students…

A: Given: p=proportion of student attended the opening midnight show=0.20

Q: A random sample of voters found that 180 out of 320 people were in favor of a gas tax. Election…

A: Given Random sample is 180 out of 320 voters are in support of tax. Total 36000 people voted in…

Q: A researcher rejected the null where r(98) = .770, p < .001 and concluded that the effect size was…

A: Conditions: If the value of r lie between 0.1 to 0.3 then the effect size is small. If the value of…

Q: Among college students, the proportion p who say they’re interested in their congressional…

A: Given:  Among the college students the proportion p who say they’re interested in their…

Q: To see if the average number of family-owned daycares per county is greater than the average number…

A: The study is about to see the average number of family-owned daycares is greater than the average…

Q: Among college students, the proportion p who say they’re interested in their congressional…

A:

Q: A market research study conducted by a local winery on white wine preference found the following…

A: Let p1 denote the proportion of women who prefer white wine, p2 denote the proportion of men who…

Q: Plastic is now surpassing aluminum as the packaging material of choice for soft drinks. According to…

A:

Q: A corrections officer read that 58% of runaways are female. He believes that the percentage is…

A: The null hypothesis for testing significance of difference between sample proportion (p) and…

Q: Among college students, the proportion p who say they’re interested in their congressional…

A: Givensample size(n)=255x=172p^ =172255=0.675α=0.05

Q: A local jam production company is confident that 60% of the population will like its new grapefruit…

A: Here events are independent.

Q: For the past years, 20% of the babies were delivered through cesarean section. The research group…

A: Given- For the past years, 20% of the babies were delivered through cesarean section. The research…

Q: Among college students, the proportion p who say they’re interested in their congressional…

A: From the provided information, Sample size (n) = 250 From which 180 students say they’re interested…

Q: ls there evidence, at 5% level, that the choice of Phone Company is independent of the type of…

A: Since , the level of significance is 5% Here , we want to test the claim that the choice of Phone…

Q: Suppose the proportion of all college students who have used marijuana in the past 6 months is p =…

A: The proportion of the students used marijuana in the past 6 months is, p = 0.40 The objective is to…

Q: Before an election, a scientific poll conducted amongst voters found that Candidate A has 53% and…

A:

Q: State the null hypothesis H0 and the alternative hypothesis H1 . H0: H1: (b) Determine the type of…

A: Given that  Sample size n =270 Favorable cases x =194 Sample proportion p^=x/n  =194/270 =0.7185…

Q: recent poll showed that 61% of adult Americans are comfortable with the legalization of marijuana,…

A: A recent poll showed that 61% of adults Americans are comfortable with the legalization of…

Q: Estimate the proportion of parts from vendor A that are defective and find the uncertainty in the…

A: here given , In a random sample of 100 parts ordered from vendor A, 12 were defective. In a random…

Q: If a police officer wants to find out whether the average speed of motorists on a highway with a…

A: Null hypothesis: It is a nullified statement about the population parameter. The signs that are…

Q: A well-known brokerage firm executive claimed that 40% of investors are currently confident of…

A: From the given information, Claim: 40% of investors are currently confident of meeting their…

Q: A small ice cream parlor has had great success over the past several years and is interested in…

A:

Q: Among college students, the proportion p who say they’re interested in their congressional…

A:

Q: 4. A city official claims that the proportion of all commuters who are in favor of an expanded…

A: For the given data perform Z test for one proportion

Q: In a public opinion survey, 60 out of a sample of 100 high-income voters and 40 out of a sample of…

A: Given : x1= 60.0 n1= 100 x2= 40.0 n2= 75 significance level, 0.05

Q: Among college students, the proportion p who say they're interested in their congressional…

A: Givenx=173n=260p^=xn=173260=0.6654α=0.05

Q: In a public opinion survey, 60 out of a sample of 100 high-income voters and 40 out of a sample of…

A: Given,n1=100x1=60n2=75x2=40p1=the proportion of all high-incomevoters whosupported a decrease in…

Q: A city official claims that the proportion of all commuters who are in favor of an expandedpublic…

A: A city official claims that the proportion of all commuters who are in favor of an expanded public…

Q: A study found that among the 2300 college students who drank energy drinks daily 850 of them binge…

A: Given:

Q: A random sample of 100 voters is taken to estimate the proportion of a state’s electorate in favor…

A: Here, the sample size is 100 and the proportion of a state’s electorate in favor of increasing the…