Explain the difference between the two formulas

Q: Which of these illustrates the APA format for reporting statistically significant results for an…

A: When we compare two independent groups of means and check they statistically significant or not. In…

Q: Assume that we want to construct a confidence interval. Do one of the following, as appropriate: (a)…

A: The following information has been provided: The sample size is n=267. The sample mean is x¯=29.9.…

Q: 9.16 According to the 2016 Majoring in Money report by the government-lending institution Sallie…

A: According to the given information in this question We need to answer three subparts

Q: . Which one of the following statements is true? ith 95% confidence we estimate that, on average, a…

A: From the above question Which one of the following statements is true? With 95% confidence we…

Q: Directions: Use the given claim to state a null and an alternative hypothesis analytically. Use…

A: Hey there! Thank you for posting the question. Since there are multiple questions posted, we will…

Q: Fizer (NOT Pfizer) is a pharmaceutical company which has developed a new vaccine for COVID-1 order…

A: Hello! As you have posted more than 3 sub parts, we are answering the first 3 sub-parts.  In case…

Q: A 2019 Pew Research poll found that 73% of U.S. adults believe that the economic gap between the…

A: Here, n = 150 and p = 0.73.

Q: A car repair business randomly selects receipts for parts purchased on 16 different jobs. The mean…

A: given data, n=16x¯=31.32s=30.42CI=0.95α=1-0.95=0.05df=n-1=16-1=15we  have to construct the 95%…

Q: Eyeglassomatic manufactures eyeglasses for different retailers. They test to see how many defective…

A: Type1 error : ( false-positive )  * It occurs when null hypothesis rejected that is true. Type 2…

Q: In a criminal trial in the United States, it must be proven that a defendant is guilty beyond a…

A: Event involves all the possible outcome of the experiment happening. If an event happen already…

Q: What is the probability there are at least 5 cars in the drive-thru?

A:

Q: florist wants to determine if a new additive would extend the life of cut flowers longer than the…

A: The last one would be valid conclusion.

Q: In a recent​ year, a research organization found that 487 of 806 surveyed male Internet users use…

A: Given that For male  sample size=806 Number of internet users =487 Female  Sample size =919 Number…

Q: Use a graphing calculator to create a scatter plot and find the line of best fit and the correlation…

A:

Q: The data below gives the mean price (in cents) of a litre of regular gasoline at self-service…

A: Given that  We have to find c..90% confidence interval for mean  d..95% confidence interval for…

Q: . Investigators are trying to determine if the contamination of a town well led to significant…

A:

Q: The Glen Valley Steel Company manufactures steel bars. If the production process is working…

A: The null hypothesis is: H0: μ = 2.8m The alternative hypothesis is: H1: μ < 2.8m

Q: The average salary for all 27 Arizona Diamondbacks (Major League Baseball) players in the 2012…

A: Given: Sample size n = 27 Sample mean X = 2653029 Sample standard deviation s = 2587139 Population…

Q: Q2 (vii.) Find the marginal density of Y₁ = X₁ + X₂ and verify that it is the same density function…

A: Given that X1, X2 be jointly continuous with joint probability density function : fx1, x2=e-x1+x2,…

Q: The price of an office chair in 2010 was $145 and in 2018 it has increased to $191. a) Construct an…

A: Index number= new price*100/base price 2010 = $145  2018 = $191

Q: In a program designed to help patients stop smoking, 243 patients were given sustained care, and…

A: Givensample size(n)=243sample proportion(p^)=0.807significance level(α)=0.05

Q: K According to a study conducted by a statistical organization, the proportion of people who are…

A: (a) Suppose the random sample of 100 people is asked, "Are you satisfied with the way things are…

Q: A simple random sample of size n = 39 is obtained from a population that is skewed left with μ = 68…

A:

Q: Assume that we want to construct a confidence interval. Do one of the following, as appropriate: (a)…

A: The question is about identifying the distribution Given : Confidence level = 0.99 No. of players (…

Q: The average number of accidents at controlled intersections per year is 5.4. Is this average more…

A: Note: If the post contains multiple sub parts in a questions only allow to do first three sub parts…

Q: If the random variable X as a mean of u and a variance of o2 what is the P((X-μ)² <20): less that…

A: Given: Random variable X has mean μ and variance σ2

Q: need a fraction please

A: The original problem is related to a die is rolled two times.

Q: A national freight delivery service is considering introducing a same-day delivery service at no…

A: In the above question, the sample size of the satisfaction score with ordinary deliveries is 56. And…

Q: QUESTION 9 You hypothesize that drinking tea reduces stress levels so you design a study comparing…

A: given data do not drink tean1 = 21x¯1 = 76s1 = 25drink tea : n2 = 26x¯2 = 62s2 = 13

Q: Suppose the length of the pregnancies of a certain animal are approximately normally distributed…

A: It is given that  Mean, μ = 285 Standard deviation, σ = 27 Sample size, n = 18

Q: A consumer advocacy group published a study of labeling of seafood sold in three U.S. states. The…

A: a) Suppose p is the true proportion of “red snapper” packages that were a different kind of fish.

Q: Each scenario shows the data used for a randomisation test on a difference in two proportions. Both…

A: From the provided Scenario 2, the observed difference between the treatment proportions is…

Q: 2) Each student in a class of 150 was randomly assigned one line of a random number table. Each…

A: Given that Sample size =150 Number of digits=30 We have to find a...p  b..the number of intervals…

Q: Assume that the data from each population is Normally distributed. Complete parts a through i below.…

A: It is given that the table shows the more alcohol in their systems than the law allows for each day…

Q: The 5-year annual investment returns of MGM Resorts International (MGM) are below: Year Annual…

A: The standard deviation of annual returns can be calculated using the formula given by, SD = √[(Ri –…

Q: The cost per item at a supermarket follows an exponential distribution. There are many inexpensive…

A: Given: The mean cost per item is μ=4.5

Q: Class 20-22 23-25 26-28 29-31 32-34 Frequency 3 2 1 3 2 Calculate Quartile-2, Decile-8,…

A: The following information has been provided: Class Frequency 20 - 22 3 23 - 25 2 26 - 28 1…

Q: Exercise 2.4. A private organization PQR was interested in estimating the average amount of real…

A: Solution: Let X be the non-real estate farm loan and Y be the real estate farm loan. From the given…

Q: In a race with 8 swimmers, how many ways can swimmers finish first, second, and third?

A: There is total 8 swimmers.

Q: a. The probability is approximately 0.0526. (Round to four decimal places as needed.) b. Fill in the…

A: The given sensitivity is 0.83 and the specificity is 0.94.

Q: A job placement agency advertised that last year its clients, on average, had a starting salary of…

A: Given information: A job placement agency advertised that last year its clients, on average, had a…

Q: QUESTION 16 You are interested in investigating the efficacy of a new pain medication and design an…

A:

Q: A study was conducted to investigate the use of community-based treatment programs among Medicaid…

A: Given Information: Prepaid medical plan: Sample size n1=311 Number of successes x1=13   Traditional…

Q: Find the upper limit of the 95% confidence interval for the value of the population mean

A: Find the upper limit of the 95% confidence interval for the population mean by using Excel. Excel…

Q: Listed below are paired data consisting of amounts spent on advertising (in millions of dollars) and…

A: From the provided information, Number of observations (n) = 9 Level of significance (α) = 0.05 The…

Q: R3.1-R3.18. What design? Analyze the design of each research example reported. Is it a sample…

A: Given Information: The manufacturers of fireworks must be sure that the rockets work properly, but…

Q: A random sample of companies in electric utilities (I), financial services (II), and food processing…

A: The data shows the sample of companies in electric utilities (I), financial services (II), and food…

Q: What is the standard deviation of differences? round to the nearest tenth

A: The data shows the efficacy of a new pain medication and placebo pain.

Q: The metropolitan bus company claims that the mean waiting time for a bus during rush hour is less…

A: From the provided information, Sample size (n) = 20 Sample mean (x̄) = 3.7 Sample standard deviation…

Q: Determine the sample size n needed to construct a 90​% confidence interval to estimate the…

A: The population standard deviation is 30 and margin of error is 6. The confidence level is 90%.