Do credit cards with no annual fee charge higher interest rates than cards that have annual fees? Among 29 cards surveyed, 17 had no annual fees while 12 charged an annual fee. Among the cards with no annual fee, the average interest rate was 19% (SD=8%). Among cards with an annual fee, the average interest rate was 17% (SD=3%). Are interest rates significantly higher for cards with no annual fees? Conduct a hypothesis test at the 10% significance level. show all steps

Q: What is an approximate 99% confidence interval for the slope of the line of best fit?

A: The provided information is, The 99% Confidence interval can be calculated as,

Q: In a survey of 1013 ​adults, a polling agency​ asked, "When you​ retire, do you think you will have…

A: From the provided information, Sample size (n) = 1013 Out of which 531 stated that they were worried…

Q: drug company claims that an allergy medication causes headaches in 5% of those who take it. A…

A: Given that  A drug company claims that an allergy medication causes headaches in 5% of those who…

Q: Out of 400 people sampled, 32 had kids. Based on this, construct a 95% confidence interval for the…

A: Solution: Let X be the number of people had kids and n be the sample number of people. From the…

Q: According to an exit poll for an​ election,54.8 ​% of the sample size of 831 reported voting for a…

A: We have sample proportion p=54.8%=0.548   and sample size n=831 To test that the population…

Q: Of 127 randomly selected adults, 31 were found to have high blood pressure. Construct a 95%…

A: Given that, Of 127 randomly selected adults, 31 were found to have high blood pressure.  X = 31 N =…

Q: A poll of 827 students at Alpha state college found that 61% of those polled preferred a quarter…

A: It is given that the proportion of the students who preferred a quarter system to a trimester…

Q: Due to the economy, are Americans staying in their first professional job longer? This was a ques-…

A: Given that,

Q: Market Research, Inc., wants to know if shoppers are sensitive to the prices of items sold in a…

A: The question is about hypo. testing Given : Randomly selected no. of shoppers ( n ) = 802 No. of…

Q: 1000 randomly selected Americans were asked if they believed the minimum wage should be raised. 600…

A: Givensample size(n)=1000x=600sample proportion(p^)=xn=6001000=0.6confidence level=95%

Q: The article “Facebook Use and Academic Performance Among College Students” estimated that 87% of…

A:

Q: oning in

A: To determine if the confidence interval supports the claim, check if the claimed population…

Q: Classify the hypothesis test as two-tailed, left-tailed, or right-tailed. At one school, the…

A: solution:- from given information hypothesis test: the average amount of time spent watching…

Q: a survey of 3409 adults, 1445 say they have started paying bills online in the last year.  Construct…

A: The confidence interval = 99%The faovarble cases [x] = 1445The sample size [n] = 3409

Q: The Congressional Budget office reports that 36% of federal dvilian employees have a bachelor's…

A: The test indicates that the proportion of employees holding bachelor's degrees or higher in the…

Q: What is the relationship between α and the confidence level of a hypothesis test?

A: In hypothesis testing, α is the level of significance, which provides details about the chance of…

Q: Calculate and interpret a 95% confidence interval to estimate the true proportion of California…

A: Given information X=360, n=600

Q: In a survey of 1008 adults, a polling agency asked, "When you retire, do you think you will have…

A:

Q: What does the 95% represent in a 95% confidence interval

A: Solution CI=95%

Q: There were 2428 Major League Baseball (MLB) games played in 2014, and the home team won 1288 of…

A: Given ,  x = 1288 n = 2428 sample proportion , p^=xn=12882428=0.5305 α=0.01

Q: In a randomly selected group of 650 automobile deaths, 180 were alcohol-related. Construct a 95%…

A:

Q: How can we interpret a 95% confidence interval?

A: How to interpret a 95% confidence Interval?  We know that,  Confidence Interval is defined as the…

Q: A sanatorium conducted a study on 3,500 women over 35 years of age, of whom 220 reported having…

A: Step 1: State the given data: number of favorable cases, x = 220sample size, n = 3500confidence…

Q: 700 randomly selected Americans were asked if they believed the minimum wage should be raised. 350…

A: Given that  p = 700 x = 350 Confidence level(c) = 90% = 0.90 Significance level (α) = 1-c = 1-0.90=…

Q: Identify the null hypothesis, alternative hypothesis, test statistic, P-value, initial and final…

A: In this scenario, It is appropriate to use one prop Z test. Hypotheses: Let p be the proportion of…

Q: In a random survey of 2221 North Americans 689 of them had blood type A+. Construct a 94% Confidence…

A:

Q: A survey shows that 10% of the population is victimized by property crime each year. A random sample…

A: From the provided information, The sample size (n) is 527, sample proportion (p) is 14% and…

Q: During the 2010 MLB seasons, the home team won 1,269 games and the away team won 1,371 games. What…

A: Solution-: Given: x=1269, n=1269+1371=2640 and P0=0.50 We want to find test statistic=?

Q: Compute the probability of successfully completing the task for an engineer having 24 months of…

A: Given the data of monthly experience of the task is a success or not for 2 engineers as shown below…

Q: A Gallup poll of 1487 adults showed that 43% of the respondents have Facebook pages.  Construct a…

A: Confidence Interval: In statistics, we can say a range of values of the specified population…

Q: Based on a sample of 1000 adult Americans, USA Today reported that 840 of them preferred cheese on…

A: Given that on a sample of 1000 adult Americans, USA Today reported that 840 of them preferred…

Q: According to the GSS 2018 dataset, 51% of 218 college graduates reported being interested in…

A: