Ethan is surveying students who are interested in watching television (TV) shows. Ethan has surveyed 504 students at Northwestern Business School (NBS), and found that 315 students watch more than 40 hours of TV shows on a monthly basis. How many additional students would be needed in the sample to estimate the proportion of all NBS students who watch more than 40 hours of TV shows each month within +/- 3 percent with 99 percent confidence?

Q: In a survey of 909 U.S.adults with children conducted by the financial Industry Regulatory…

A: The hypotheses for the test is given below.Null hypothesis:H0: p = 0.30Alternative hypothesis:H1: p…

Q: After running the small study, Mary is planning a big study with 600 customers. The customers will…

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

Q: 60 people are  surveyed  in new  york city .Out of the  60 , 43 people have  corona  infection…

A: Given, Total no. of people surveyed=60 No. of people having corona infection=43 No. of people tested…

Q: A DNP student wants to evaluate the change in knowledge scores of a group of cardiac patients after…

A: In given problem, a DNP student obtains a pretest at the beginning of class and immediately after…

Q: A recent poll randomly sampled 100 unemployed and 950 employed Canadians and asked them about their…

A: Assume that p1 and p2 are the true population proportions of employed and unemployed Canadians, who…

Q: Professors collected data consisting of eye color and gender of statistics students. Among 950 male​…

A: Given that, For males:  X1= 372 and sample size n1= 950  p1^ = X1/n1 = 372/950 =0.3916 For females:…

Q: estimate how many people you would need to survey in order to estimate the percentage in your…

A: here given , Suppose you want to estimate the percentage of employees who want to work from home.…

Q: The safety commissioner in a large city wants to estimate the proportion of buildings in the city…

A: The following information has been given: The sample size is n=40. The favorable cases are x=4.

Q: an article in Forbes magazine reported that 73% of fortune 500 companies have Twitter accounts. A…

A: The provided information are:

Q: Approximately 1.55 percent of people ages 40-50 have breast cancer.* Suppose a person has a 86…

A: Probability is a chance of occurrence of any event.

Q: Newborn babies are more likely to be boys than girls. A random sample found 13,573 boys were born…

A: The claim of the test is there is sample evidence that the birth of boys is more common than the…

Q: A researcher believes that among the residents of a remote community, 10% have type O blood, 10%…

A:

Q: Women athletes at the a certain university have a long-term graduation rate of 67%. Over the past…

A:

Q: A nationwide job recruiting firm wants to compare the annual incomes for childcare workers in…

A: There are two independent samples which are Illinois and Massachusetts. We have to test whether the…

Q: An economist believes that the median income of lawyers who recently graduated from law school is…

A: Given that, An economist believes that the median income of lawyers who recently graduated from law…

Q: What is the null hypothesis? see examples in E3:G8 b) What is the alternative hypothesis? see…

A: Let p be the proportion of students try a rental service at some point in their college career. It…

Q: A restaurant chain would like to measure the proportion of customers who are generally satisfied…

A: During a 1-week period, 147 customers were surveyed and 93% of them reported as being either…

Q: Some scientists believe that the sickle-cell trait lowers the risk of developing malaria. To explore…

A: Step 1:   It is needed to test, whether there is an association between the sickle- cell trait and…

Q: In a survey of 323 adults over 50, 60% said they were taking vitamin supplements. Find the margin of…

A:

Q: 1)The records for all trains scheduled to depart from the opera house train station last year showed…

A: In given questionConcept Used: Population: Population is a characteristic of the specified area or…

Q: 3. Researchers conducted a study of smartphone use among adults. A cell phone company claimed that…

A: Given Information: Male: Sample size (n1) = 1343 Sample proportion (p^1) = 10% = 0.10 Female: Sample…

Q: more than 50% Australians would download COVIDSafe app? Check the condition and test at 5% level.

A:

Q: A random sample of n1 = 291 voters registered in the state of California showed that 150 voted in…

A: From the provided information, n1=291x1=150n2=215x2=128 level of significance (α) = 0.05

Q: Churn’ is a term used to describe the rate at which a company loses customers to its competitors. In…

A:

Q: 3) In 2005, 21% of Americans reported that they smoked cigarettes. In a recent study to see if the…

A:

Q: According to a national statistics bureau, 3.7% of males living in the Southwest were retired…

A: Given: 3.7% of males living in the Southwest were retired exterminators. Population proportion (p) =…

Q: In a recent poll of 800 Democrats and 950 Republicans, 696 of the Democrats and 656 of the…

A: Democrats are taken as group 1. Republicans are taken as group 2. Given:…

Q: A sociologist wishes to conduct a poll to estimate the percentage of Americans who favor affirmative…

A: From the given information, she wants to use a 2003 estimate of 55% obtained from a Gallup Youth…

Q: Q3. To compare customer satisfaction levels of two competing companies, 174 customers of company 1…

A:

Q: (a) State the null hypothesis H and the alternative hypothesis H₁. Ho :O H₁:0 (b) Determine the type…

A: Given, n1=10, n2=10, σ1=6400 and σ2=6600 Level of significance=0.10

Q: Women athletes at a certain university have a long-term graduation rate of 67%.Over the past several…

A: a) The level of significance is 0.10. b) State the null and alternative hypotheses: The claim is…

Q: A national survey of 1,000 adults conducted on August 2-10, 2017 from CompareCards, conducted by…

A: The survey is conducted based on 1,000 adults conducted on August 2-10, 2017 from CompareCards,…

Q: In 2001, the Gallup poll found that 81% of American adults believed that there was a conspiracy in…

A: Given that, x=634,n=1039 The sample proportion is,

Q: Suppose a marriage counselor believes that the proportion of married couples with three personality…

A: The provided information are:

Q: Reports show that 92% of online searches in March 2021 use Google as the search engine. A network…

A: Given: p=0.92 p^ = 758800=0.9475 α = 0.05 to test the hypothesis of proportion of searches that use…

Q: A nationwide job recruiting firm wants to compare the annual incomes for childcare workers in New…

A: New…

Q: What size sample should be obtained to be 95% confident that the sample proportion will not differ…

A: Suppose p is the true population proportion.

Q: A nationwide job recruiting firm wants to compare the annual incomes for childcare workers in…

A: given data

Q: A substance abuse counselor wants to demonstrate the effect of situational stress on alcohol…

A: Introduction: Denote μ1, μ2 as the true mean measures of alcohol rating, as given by the group of…

Q: The state highway department is studying traffic patterns on one of the busiest highways in the…

A: Provided information is ;  sample size(n) = 64 sample mean(x¯)=  14,205 sample standard…

Q: Determine what is the appropriate statistical procedure, with a brief explanation (one sentence) as…

A: As per our guidelines, we are allowed to answer three sub-parts Given Data :   Current week (X1)…