Proctor & Gamble claims that at least half the bars of Ivory soap they produce are 99.44% pure (or more pure) as advertised. Unilever, one of Proctor & Gamble's competitors, wishes to put this claim to the test. They sample the purity of 101 bars of Ivory soap. They find that 46 of them meet the 99.44% purity advertised. Calculate the p-value

Q: A university dean is interested in determining the proportion of students who recieve some sor of…

A:

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

A: Givensample size(n)=265x=216p^=xn=216265=0.815α=0.10

Q: A marketing researcher measures 100 doctors’ reports of the number of their patients asking them…

A: Use the given information to determine the type of t-test in the given data. From the information,…

Q: In a recent election, 63% of all registered voters participated in voting. In a survey of 275…

A: The percent of participation of voters is equal to: In the given case; when the observation sample…

Q: The executives at Sandbachian, inc., having recently solved their widget crisis, have another…

A: Let ‘x’ be the no of defective manhole covers i.e x=40 and n=800 sample propotion (P)=x/n p=40/800…

Q: In a study to estimate the proportion of smokers among the residents in a certain city and its…

A: To testH0:p1=p2H1:p1≠p2

Q: According to a certain government agency for a large​ country, the proportion of fatal traffic…

A: Solution: Given information: n= 110 Sample size of traffic fatalities x= 49 traffic fatalities…

Q: A survey of 2310 adults in a certain large country aged 18 and older conducted by a reputable…

A: Given information- We have given that in a survey of 2310 adults in a certain large country aged 18…

Q: Use the figure to the​ right, which shows the percentages of adults from several countries who favor…

A:

Q: "The US Centers for Disease Control and Prevention said about 72 million Americans-nearly one out of…

A: We use ANOVA to test more than two means while t-test can be used in case of only two means.

Q: A finance blogger is writing an article about credit card use. As they write their article, the…

A: If P-value ≤ α, reject H0. If P-value > α, do not reject H0.

Q: A factory for the production of light bulbs took a random sample of 200 units and found that 18 of…

A: The sample size is N=200N = 200 the number of defective cases is X=18X = 18 and the sample…

Q: The American Association of Individual Investors (AAII) conducts a weekly survey of its members to…

A:

Q: During routine screening, a doctor notices that 20% of her adult patients show higher than normal…

A: Obtain the sample size of a preliminary estimate for p is 0.20 with the 95% confidence. The formula…

Q: The manager of a fast-food restaurant wants to reduce the proportion of drive-thru customers who…

A: Given, P(Type II error)=0.14 Power is the probability of rejecting the null hypothesis when it is…

Q: versity is trying to determine how many of their students have watched a bystander intervention…

A: Given: Total number of students = 3500 Number of students included in the survey = 1050 Percentage…

Q: You are conducting a study to see if the proportion of voters who prefer the Democratic candidate is…

A: given information: let us consider x : potential voters prefers the democratic candidate.…

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

A: Given :  Claim : The proportion of college students who say they’re interested in their district’s…

Q: A hospital has studied its patient history and had concluded that 2% of patients that have been…

A: Given: Proportion of patients infected with staff bacteria = 2100=0.02

Q: In examining the ability of users to complete a variety of information-seeking tasks on their mobile…

A:

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

A:

Q: As the newly hired manager of a company that provides cell phone service, you want to determine the…

A: When we don't have any prior information about the population proportion, we generally take it as…

Q: An organization published an article stating that in any one-year period, approximately 8.2 percent…

A: Proportion z_test: If the given sample size is more than 30 or Population standard deviation is…

Q: ple of 1000 Americans, it was discovered that 920 of them lived in neighborhoods with acceptable…

A: The point estimate (sample proportion) of the sample of size n can be defined as: p^=xn  Here, x =…

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

A:

Q: The American Association of Individual Investors (AAII) conducts a weekly survey of its members to…

A: a. Given: n=300, p=0.332 The null and alternative hypothesis is, H0:P=0.385Ha:P≠0.385 The test…

Q: Time magazine reported the result of a telephone poll of 800 adult Americans. The question posed of…

A: Given n1=605 n2=195 y1=351 y2=41

Q: In recent years, approximately 55% of eligible voters take the time to vote in presidential…

A: Givensample size(n)=200x=128α=0.05

Q: The manufacturer of a new racecar engine claims that the proportion of engine failures due to…

A: Step 2: n1=135 n2=175 x1=14 x2=8 The sample proportion of p^1 is, p^1=x1n1    =14135   =0.104

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

A: a) Claim : The proportion of college students who say they’re interested in their district’s…

Q: In a sample of 88 children selected from a city, 8 children suffer from asthma. What is the P-value…

A: Statistical hypothesis testing is an important method in inferential statistics. Statistical tests…

Q: In a random sample of 1022 U.S. adults, 480 think that the U.S. government is doing too little to…

A: Hypotheses:   Here p1 and p2 be the two proportions. The aim is to check whether p1= p2. The null…

Q: The Gallup organization periodically polls adults living in the U.S. about the issue of immigration.…

A: Given claim: IS there evidence for a real change in opinion among U.S adults between 2016 and 2018…

Q: A sample of 300 items was selected. compute the p-value

A:

Q: A nonprofit company concerned with the school dropout rates has designed a tutoring program aimed at…

A:

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

A:

Q: At any age, about 20% of American adults participate in physical conditioning activities at least…

A:

Q: In a random sample of 1022 Canadian adults, 480 think that the Canadian government is doing too…

A:

Q: The manager of a small supermarket chain wants to estimate the proportion of time stockclerks spend…

A: Assume that the population proportion is 0.5. It is known that the critical value for 98% confidence…

Q: Do vaccines work? I take a sample of 1000 of unvaccinated people exposed outside and determined that…

A: State the hypotheses.

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

A:

Q: The local sheriff has staked his campaign for re-election on the claim that that at least 88% of the…

A: Givensample size(n)=66p^=80%=0.80p=88%=0.88

Q: The manufacturer of a new racecar engine claims that the proportion of engine failures due to…

A: Solution: Given information: n1= 115 Sample size of new engine x1= 12 new engine failed n2= 120…

Q: A university dean is interested in determining the proportion of students who receive some sort of…

A: Given: Confidence level=95%Margin of error E=2% From the Standard Normal Table, the value of z* for…

Q: An auditor revlewed 25 oral surgery Insurance clalms from a particular surgical office, determining…

A:

Q: The manufacturer of a new racecar engine claims that the proportion of engine failures due to…

A: Given data : x1= 14.0 n1= 135 x2= 8.0 n2= 175

Q: A research center claims that a least 31% of adults in a certain country think that their taxes will…

A:

Q: "The US Centers for Disease Control and Prevention said about 72 million Americans-nearly one out of…

A: Type I error is the probability of rejecting the null hypothesis when it is actually true.

Q: Twenty years ago, 52% of parents of children in high school felt it was a serious problem that high…

A: using the given data fill all the blanks required

Estimation

A new framework of data analysis where the new statistical methods are used for interpreting the results and analyzing the data is known as estimation in statistics.