A researcher is using a two-tailed hypothesis test with α = .05 to evaluate the effect of a treatment. If the boundaries for the critical region are t = ± 2.080, then how many individuals are in the sample?

Q: Smoke-Free Legislation and Asthma Hospital admissions for asthma in children younger than 15 years…

A: Group 1: Before the smoke free legislation Sample mean=5.2%  Standard error =0.7%  Group 2:  We…

Q: A study was conducted to determine if differences in new textbook prices exist between on-campus…

A: number of books (N)=12 number of retailers (T) =3 alpha =0.10   Null hypothesis: H0= There are no…

Q: l land with the buttered side down when dropped. Identify the null and alternative hypotheses to…

A: Given that  n=55 , X=21 X=buttered toast will land the buttered side down p=50%  Note: According to…

Q: X 400 390 500 355 375 350 370 480 450 500 Y 20 19 28 15 19 16 18 26 22 27

A: Our explanatory variable is the number of defective products yielded by a machine. Our response…

Q: Express the confidence interval 0.444 < p < 0.888 in the form p + E. p±E= +

A: The confidence interval 0.444&lt;p&lt;0.888

Q: Find the probability that if a person is chosen at random, he believes life exists elsewhere in the…

A: Here Given  Total No of people=n=344 + 393 = 737 No of people Responded yes= No of Favorable…

Q: b. determine the test statistic c. determine the p-value

A: A data set about speed dating includes "like" ratings of male dates made by female dates. The…

Q: a. Let p denote the population proportion of correct hand selections by touch therapists. Identify…

A: a) - Let p = proportion that touch therapists uses a random guess method. Here, random guess means;…

Q: Use a t-distribution to answer this question. Assume the samples are random samples from…

A: n1=30n2=40

Q: A local buffet has steak night every Thursday night. They have a customer guarantee that  each filet…

A: Given: Each filet weights on average (mean) 6.3 ounces with a standard deviation of 0.04.  Let,  X:…

Q: The life of light bulbs is distributed normally. The mean life time of a bulb is 520 hours and the…

A: Answer: Using the given data, Let X represent the life time of a light bulb X follows normal…

Q: What is the predicted response value?

A: Regression Equation  y= 0.561x- 12.303 r=0.794

Q: Given a BSC with p = 0.8 and P = 0.7 (1) Compute the output probability distribution: 9₁ and 9₁.…

A: (1) The output probability distribution for a Binary Symmetric Channel (BSC) with crossover…

Q: If n = 520 and (p hat )= 0.45, find the margin of error at a 95% confidence level

A:

Q: A sample of eight observations is taken from a distribution with unknown mean. Your sample mean is…

A: Answer: From the given data, Sample size(n) = 8 mean (x¯) = 8.19 Standard deviation(S) = 0.72 90%…

Q: A random sample of n₁ = 269 people who live in a city were selected and 88 identified as a "dog…

A: Given that : A random sample of n1  = 269 people who live in a city were selected and 88 identified…

Q: 1. Using a calculator or computer, sketch the grant of the following function. (i)y = 3* (ii)…

A: graph of y=3^x The function y = 3^x is an exponential function. Its graph is a curve that starts…

Q: Construct the scatter plot using your TI calculator and comment on the relationship (no need to show…

A: From the above question We are given that Let y be Ford’s market share at x years since 2015.…

Q: Give the test statistic and the p-value. Round your answer for the test statistic to two decimal…

A: In 2007 a Harvard psychologist set out to test her theory that "Mind-Set Matters." She recruited 75…

Q: Let (Ω, F, P) be a probability space, G be a sub-sigma-field of F. Supoose X is a random variable…

A: This question is about proving that the expected value of the squared difference between a random…

Q: What distribution could be used to approximate a t-distribution with v=90 degrees of freedom?

A: degrees of freedom v=90

Q: Copy Machine Use A store manager hypothesizes that the average number of pages a person copies on…

A: From the provided information, Population standard deviation (σ) = 30.9 Sample size (n) = 42 α =…

Q: Suppose X₁, X., X-f(x;0) with f(x,0)= Find the MLE of the odds of success 1) = (*^) 0² (₁-0)*²*, 0…

A: Given that X1,X2,...,Xn are IID ~B(k,θ) with PMF given by: f(x;θ)=kxθx(1-θ)k-x;x=0,1,2....,k…

Q: R can be used to find the critical value for an F distribution for a given significance level. For…

A: k=4, n=8

Q: I have error message, and how will I fix that? Thanks

A: It appears that you were running some R code when you ran into some issues with missing functions.…

Q: Use any value and figure out whether it's qualitative or quantitative, is it discrete or continuous,…

A: Sure! For this exercise, let's use the value "age = 25".

Q: Scores on a standardized exam are known to follow a normal distribution with standard deviation o =…

A: From the provided information, Sample size (n) = 75 Sample mean (x̅) = 73.4 Population standard…

Q: Find the probability of the given event:- Event: Drawing a jack card randomly from a well…

A: Answer: Using the given data, Given event is, Drawing a jack card randomly from a well shuffled deck…

Q: If one of the pedestrian deaths is randomly selected, find the probability that the driver was not…

A: Here from given table  Total number of death of pedestrian = 984 Probability = no of Favorable…

Q: The claim is that smokers have a mean cotinine level greater than the level of 2.84 ng/mL found for…

A: It is given that, The sample size is 768 The test statistic is t = 52.829 We have to write the…

Q: A report statesb that 44% of home owners had a vegetable garden. how large a sample is needed to…

A: Answer: Using the given data, A report stated that 44% of home owners had a vegetable garden, P =…

Q: A researcher claims that exactly 40% of all adults in the U.S. use their cell phone for most of…

A: A researcher claims that exactly 40% of all adults in the U.S. use their cell phones for most of…

Q: The test statistic of z= 1.57 is obtained when testing the claim that p > 0.3. a. Identify the…

A: Answer  Given  Z = 1.57 H0: P= 0.5 H1: P&gt;0.5 [right-tailed test]. alpha = 0.01

Q: sample was done, collecting the data below. Calculate the standard deviation, to one decimal place.

A: For given Sample  X=13,8,1,11,29

Q: Test the claim that 73% of women shoppers remained loyal to their favorite supermarket in the last…

A: Sample size n =610 Favorable cases x =417 Sample proportion p^=x/n  =417/610 =0.6836

Q: ls give me a general discussion and a conclusion for this

A: This dataset displays the five-year average temperature change in Western European nations. Every…

Q: Determine the t-value in each of the cases. Click the icon to view the table of areas under the…

A: We have given that,  Degree of freedom (df) = 20 and significance level = 0.10 ( right tail)

Q: Giving a test to a group of students, the grades and gender are summarized below A B C Male 18 4 15…

A: A B C Male 18 4 15 Female 11 14 8

Q: The undergraduate grade point averages (UGPA) of students taking an admissions test in a recent year…

A: Mean(μ)=3.36standard deviation(σ)=0.16

Q: The North American Free Trade Agreement (NAFTA) enacted in 1994 is a trilateral trade agreement…

A:

Q: A report statesb that 33% of home owners had a vegetable garden. how large a sample is needed to…

A: p=33%=0.33, E=5%=0.05

Q: The following data represents the age of 30 lottery winners. 24 25 28 33 35 36 36 43 45 49 56 59…

A: Solution-: Given data:…

Q: A poll is given, showing 80% are in favor of a new building project. If 5 people are chosen at…

A: Answer: From the given data, Let X: Number of persons who are in favor of new building project Here,…

Q: e shape of the distribution of the time required to get an oil change at a 10-minute oil-change…

A: The shape of the distribution of the time required to get an oil change at a 10-minute oil-change…

Q: Determine the sample size needed to construct a 95% confidence interval to estimate the population…

A: Answer  Given  Margin of error = [E] = 58.03 Standard deviation = σ =513.53 Confidence interval =…

Q: What evidence justifies the use of this test? Check all that apply The sample standard deviation is…

A: Aa per bartleby guidelines we can answer only first three subparts and rest can ne reposted…

Q: Data on 4400 college graduates show that the mean time required to graduate with a​ bachelor's…

A: The sample mean = 5.65 Standard deviation is 1.15 The sample size, n is 4400.          From the…

Q: Express the confidence interval (0.059,0.155) in the form of p-E <p<p+E. <p< (Type integers or…

A: From the provided information, Confidence interval is (0.059, 0.155)

Q: 11. Consider the bisection method starting with the interval [1.5,3.5] (a) What is the width of the…

A: The bisection method is an iterative algorithm for finding the root of a continuous function. It…

Q: As Director of Student Services for the Lake County School District, you wish to estimate the…

A: X=35, n=50