The time needed for college students to complete a certain paper-and-pencil maze follows a Normal distribution with a mean of 30 seconds and a standard deviation of 3 seconds. You wish to see whether the mean time μ is changed by vigorous exercise, so you have a group of nine college students exercise vigorously for 30 minutes and then complete the maze. Assume that o remains unchanged at 3 seconds. The hypotheses you decide to test are Ho: μ = 30 versus H₁ : µ ‡ 30. Suppose it takes the nine students an average of x = 32.05 seconds to complete the maze. At the 1% significance level, what can you conclude? Ho should be rejected because the P-value is less than 0.01. Ho should not be rejected because the P-value is greater than 0.01. O Ha should be rejected because the P-value is less than 0.01. Ha should not be rejected because the P-value is greater than 0.01.

Q: The relationship between two variables partialling out the effect that a third variable has on one…

A: The correct answer is a. Partial correlation.

Q: Consider the matrix T = (4) to three decimal places. 0 0.2 0.0 0 0.3 0.3 1 0.5 0.7 a) If (0) = ») Is…

A: The Given transition probability matrix is: T=00.2000.30.310.50.7 Regular Markov Chain. A transition…

Q: Remove the data entry for the man who is 50 years old and has a systolic blood pressure of 201…

A: From the given data  The correlation coefficient r is 0.916  Remove the data entry for the man who…

Q: 5) A quality control inspector would like to evaluate the lot to lot consistency in the flexibility…

A: a) The appropriate null hypothesis is that there is no difference in tie-down flexibility between…

Q: Before leaving the factory, items are inspected to determine if they are good for use or defective…

A: i.e,      P(F) = 0.10     P(Fc) = 0.90

Q: constructu a 95% confidence interval estimate for the population standard deviation, of the annual…

A: Sample size, n=14 Sample standard deviation, s=3725 Confidence level=95%

Q: Assume that a sample is used to estimate a population proportion p. Find the 99.9% confidence…

A: Sample size n =278 Sample proportion p^=0.42

Q: a. How many ways are there for the passengers to be assigned a floor? b. How many ways are there…

A:

Q: 13.2.2Polymer Concentrations for Optimal Fiber Strengths Two polymers are ingredients in the…

A: The data for the concentration of Polymer 1, Polymer 2, and fiber strength is given.

Q: Table 3. Mortality rates by HIV status of the mother at the time of the child's birth. HIV status…

A: The Poisson regression output is given.

Q: 123 45 I 0.70 0.60 0.70 0.60 0.50 Factors II -0.60 0.40 -0.50 0.50 0.40 [xx' 0.90 0.80 0.83 0.83…

A: The table above provides loading coefficients and reliability coefficients for five variables of…

Q: A normal distribution is informally described as a probability distribution that is "bell-shaped"…

A: Here given that normal distribution have bell shaped curve

Q: The measurements are made on the inside diameter of the bearing, with only the last three decimals…

A:

Q: We are going to flip a fair coin (heads or tails with equal chance) 3 times, and record the outcome…

A: A coin is flipped 3 times and recorded the outcome of each flip .

Q: Are there differences in airfare depending on which travel agency website you utilize? Suppose the…

A: The correct hypothesis will be: H0 : μA = μB = μC Ha : Not all the population means are equal.

Q: Assume the readings on thermometers are normally distributed with a mean of 0°C and a standard…

A: normal distributionμ = 0σ = 1 Z~N(0,1)so x follows standard normal…

Q: When the predictive validity coefficient is equal to +1 or -1, then Sy.x (or Sest) is equal to:

A: When the predictive validity coefficient (also known as the correlation coefficient between the…

Q: 40% of consumers believe that cash will be obsolete in the next 20 years. Assume that 6 consumers…

A: P(believe that crash will be absolete) = p = 0.40sample size (n) = 6x = no. of consumer believe that…

Q: Fourty six percent of the students in a class of 120 are planning to go to graduate school, Find the…

A: P(plan to go to graduate school) = p = 0.46 sample size (n) = 120 x = no. of students plan to go to…

Q: Make a scatter diagram for the data. Use the scatter diagram to describe how, if at all, the…

A: Enter the data in Excel.

Q: Use a t-distribution to find a confidence interval for the difference in means μ = μ₁ −μ₂ using the…

A: From the provided information, xd=1.8sd=2.4nd=30 Confidence level = 95%

Q: The indicated z score is (Round to two decimal places as needed.)

A: Here given standard normal distribution with mean zero and standard deviation of 1.

Q: A newspaper published an article about a study in which researchers subjected laboratory gloves to…

A: Pooled proportion: 0.37 Test statistic, z: 11.1069 Critical z: 2.3264 P-value: 0.0000 98% Confidence…

Q: ㅏ 8 + 9 10 11 12 13 14 15 16 17 18 Q data Based on the boxplot above, identify the 5 number summary

A: We have given the boxplot. We have to identify the 5 number summary.

Q: The state test scores for 12 randomly selected high school seniors are shown on the right. Complete…

A: Sample size (n) = 12 Mean x̅ = 910.6 Standard deviation (s) = 305.1 Significance level(α) = 1 - 0.90…

Q: You are to flip a fair coin, where probability of heads is equal to 50% (and tails is 50%). The fair…

A: Answer:- Given, The probability of head , P(H) = 50% = 0.50  The fair coin is flipped, n = 100000…

Q: c) What is the probability that the observed depth is at most 9? . (round your answer to 4 decimal…

A:

Q: d) Why is a smaller MSE (Mean Square Error) better? e) What is the relationship between error in…

A: d..Why is a smaller MSE (Mean Square Error) better  e..What is the relationship between error in…

Q: Estimate A 96% confidence interval for the following data n=33, X bar= 108, sigma= 45 Round…

A: Answer: From the given data, sample size(n) = 33 mean (x¯) = 108 standard deviation(σ) = 45 96%…

Q: Find the area of the shaded region. The graph depicts the standard normal distribution of bone…

A: standard normal distribution Z~N(0,1) P(z>-1.18) = ?

Q: Assume that thermometer readings are normally distributed with a mean of 0°C and a standard…

A: normal distributionμ = 0σ = 1so x follows standard normal distributionX~Z~N(0,1)P(0.50<x<1.25)…

Q: The indicated z score is Round to two decimal places as needed.)

A: Here given standard normal distribution with Mean zero and standard deviation 1.

Q: Assume that newborn girls have birth weights with a mean of 3022 grams and a standard deviation of…

A: μ=3022σ=716n=100

Q: A group of researchers wanted to determine if the mean HDL of male patients is less than female…

A: Given The sample mean for male=1.1318 The sample Sd for male=0.16191 n1=28 The sample mean for…

Q: Assume that when human resource managers are randomly selected, 38% say job applicants should follow…

A: P(follow up within 2 weeks) = p = 0.38sample size (n) = 15x = no. of applicants folow up within 2…

Q: a) For X Normal (µ, 225), and P(X ≤ 50) = 0.9871, find μ

A: Here given X follow normal distribution with mean =μ and variance = 225.

Q: A study considered whether daily consumption of garlic could reduce tick bites. The study used a…

A: Hypothesis is an assumption that is being tested.

Q: You have a 4 sided die (with numbers 1,2,3, and 4) that you are going to throw. You are told that…

A: The numbers on die (X) 1 2 3 4 Probability (P) 0.3 0.3 0.2 X

Q: A manufacturer of detergent claims that the contents of boxes sold weigh on average at least 20…

A: Population mean (µ) = 20 Standard deviations (σ) = 0.4Sample size (n) = 25Sample mean (x̅) =…

Q: For the past several years, the state prison system has been concentrating on getting inmates who…

A: The independent variable is the number of years the program has been implemented (x) and the…

Q: The bar graph below shows the percentage of students who received each letter grade on their last…

A: Answer:- Given, The class contains 20 students.  According to the bar graph, the percentage of…

Q: Do you think your pulse rate is higher when you are taking a quiz than when you are sitting in a…

A: Given data: As the same individual student's pulse rate was measured in two different scenarios…

Q: A study wanted to compare the LDL of male and female patients. Results from 100 patients are shown…

A: To test if there is a significant difference between the mean LDL of male and female patients, we…

Q: Golf-course designers have become concerned that old courses are becoming obsolete since new…

A: Suppose a random sample of 148  golfers be chosen so that their mean driving distance is 252.7…

Q: Which of the following is a correct test statistic F, in comparing the variance LDL of males and…

A: None of the provided options is the correct answer for the test statistic F in comparing the…

Q: Assume that a randomly selected subject is given a bone density test. Those test scores are normally…

A: Assume that a randomly selected subject is given a bone density test. Those test scores are normally…

Q: a newsgroup is interested in constructing a 95% confidence interval for the proportion of all…

A: n=540 X=409

Q: Using a standard normal table or excel function find the given probability, P(Z>0.29)

A: Answer: From the given data, P(Z>0.29) is,

Q: Click the icon to view the data. Which box-and-whisker plot below represents the data? Length of…

A: The data table containing the length of life of 50 fruit flies provided in the question is as…

Q: Consider the following studies. Study I: A researcher randomly divided 200 high school students…

A: Part A: Study I is experimental because the researcher randomly divided the participants into two…