2. Suppose you wish to test the hypothesis Ho:p=0.8 vs H:p<0.8. Assume that the rejection region {y<12} is used, where y is the total of successes and n = 20. Find a . Also, find B when p = 0.4.
Q: (b) Use Fisher's LSD procedure to test whether there is a significant difference between the means…
A: When there are more than two groups that have to compare about mean then the test used is ANOVA. It…
Q: A tire store advertises that the average price of a new set of their tires is only $150. One of…
A: Hi, Since your question has more than 3 parts, we have solved only the first three subparts for you.…
Q: A meal box enterpreneur wants to know how the meal box size (in centimeters) of parents compares to…
A: 1. The hypotheses are given below: Null hypothesis: H0:Md=0 Alternative hypothesis: H1:Md>0 2.…
Q: A company is designing a new electric to compete with a competitor. The company wants their average…
A:
Q: (f) Use a 1% level of significance to test the claim that < 0. (Round your answe t = -8.59 critical…
A: Whether the independent variable is the good predictor or not is studied using the slope of…
Q: For 80% of people with insomnia, one researcher claims to use a drug that claims to induce…
A: "Hello. Since your question has multiple sub-parts, we will solve first three sub-parts for you. If…
Q: What is the optimal time for a scuba diver to be on the bottom of the ocean? That depends on the…
A:
Q: t is the optim time for a scuba diver to be c the bottom of the ocean? That depends on the depth of…
A: x y 16.1 2.48 23.3 2.38 29.2 1.68 38.3 1.03 51.3 0.75 20.5 2.38 22.7 2.2 NOTE: Hi…
Q: (a) make your conclusion. Find the rejection region with the significance level a = 0.01, and use it…
A: 5. (a) The test statistic is, z=x¯-μσn=12.9-130.225=-0.10.04=-2.5 The test statistic is -2.5. The…
Q: What is the optimal time for a scuba diver to be on the bottom of the ocean? That depends on the…
A: regression analysis
Q: Is the stance on the death penalty independent of sex? Their obtained frequencies are: Male (Favor:…
A: For the given data Use Chi square test
Q: For a hypothesis test of the claim that the mean amount of sleep for adults is less than 9 hours,…
A: From the given information, Consider, the given claim can be set as: H0:μ≥9 Hours of sleepHa:μ<9…
Q: Please solve this by hand and also with r-studio code not the excel output please. An experimenter…
A: The given hypothesis is H0:μ=420 versus Ha:μ<420.
Q: A random sample of n-25 is obtained from a population with varsance e, and the sample mean is…
A: A random sample of n=25 is obtained from a population with variance σ , and the sample mean is…
Q: What is the optimal time for a scuba diver to be on the bottom of the ocean? That depends on the…
A: Since you have posted a question with multiple subparts, we have provided answer for first 3…
Q: . The average amount of calories in a box of cookies is 120 calories. A person thinks this number…
A: Given' Average amount of calories in a bag cookies is 120 calories A person think (claim) that this…
Q: 1. A random sample of n = 20 products are taken from the production lines of a factory. Let = 1,...,…
A: The defective no. of items in the sample are denoted as: T=∑i=120Xi. It is specified that H0 is…
Q: question 2 Give the rejection region. Group of answer choices t less than 1.64. z less than 1.64.…
A: Given Data : For Sample 1 x̄1 = 8.0 s1 = 2.0 n1 = 50 For Sample 2…
Q: Just B please
A: In each hypothesis test, the chance of error of two types. They are type 1 and type 2 error. Type 1…
Q: What is the optimal time for a scuba diver to be on the bottom of the ocean? That depends on the…
A: Since you have posted a question with multiple sub-parts, we will solve first three sub- parts for…
Q: c. Let X1, X2, ..., Xn be independent and X; ~ N(iµ,o²), where u and o? are unknown parameters. Find…
A:
Q: A sample of 800 truck drivers from Minnesota were interviewed randomly and 316 answered they like…
A:
Q: A study showed that 70% of the people shop online. In 2013 a random sample of 1500. In 2014 a random…
A:
Q: Suppose there is a claim that a certain population has a mean, μ, that is less than 6. You want to…
A: a) The population mean is μ.
Q: hypothesis test is conducted with H0 : µ = -25 vs. Ha: µ > -25. The hypothesis test sample finds x̅…
A: Given that H0 : µ = -25 vs. Ha: µ > -25. x̅ = -23.6, s = 3, and n = 16
Q: A tax accountant would like to test the claim that the proportion of individuals who owe when filing…
A: From the given information, α=0.005. Null Hypothesis: H0: µ ≥0 Alternate Hypothesis: Ha:…
Q: 31) To determine if the average sales per week for store A is greater than the average sales per…
A: Given that for testing H0: μA≤μB versus Ha: μA>μB we got the p-value = 0.62. This is a one-tailed…
Q: Write a linear approximation (equation) for the US data. First, clearly define your variables. Use…
A: Let t denote year and N denote demand in US. The data is as follows t N 1 13.1 2 13.66 3…
Q: 3. The average time a teenager watches tv in a day is 93 minutes. Suppose that the population is…
A: Given that We have to find the rejection region:
Q: A previous study showed to determine whether a sales tax on soda will reduce consumption of soda in…
A: Given that, A previous study showed to determine whether a sales tax on soda will reduce consumption…
Q: What is the optimal time for a scuba diver to be on the bottom of the ocean? That depends on the…
A: Since you have posted a question with multiple sub-parts, we will solve first three sub- parts for…
Q: What is the optimal time for a scuba diver to be on the bottom of the ocean? That depends on the…
A: Comment: As per the our company guidelines we are supposed to answer only three subparts. Kindly…
Q: 1. A random sample of n = 20 products are taken from the production lines of a factory. Let = 1,...,…
A: The defined no. of defective samples is: T=∑i=120Xi. And the claim under H0 if T≤4.
Q: Suppose there is a claim that a certain population has a mean, μ, that is less than 7. You want to…
A: Given value of the test statistic is -0.942 and critical value is -1.282.
Q: What is the optimal time for a scuba diver to be on the bottom of the ocean? That depends on the…
A: Given data: (a) To find Σx, Σy, Σx2, Σy2, Σxy, and r. Calculations: Thus, ∑x=197.4 ∑y=13…
Q: Since p = 0.033, we have strong evidence to suggest that the distribution of proportions is not the…
A: Since, the chi-square test is conducted chi-square test statistic value = 19.63
Q: for a diver to De on DoL ean? Thlat depehus defines the "optimal time" to be the time at each depth…
A:
Q: Q1:Let p equal the proportion of drivers who use a seat belt in a country that does not have a…
A: Given, p = proportion of drivers who use a seat belt in a country that does not have a mandatory…
Q: Consider a population of values described by X ~ N(20, 92) For a specific sample of size n = 15,…
A: Given information- We have given the normal distribution X ~ N (20, 92) So, Population mean, µ = 20…
Q: 15. A researcher for a cereal company wanted to demonstrate the health benefits of eating oatmeal. A…
A: Note: " Since you have posted many sub-parts. we will solve the first three sub-parts for you. To…
Q: Data from 12 individuals was collected about their sleeping habits after meditation. These scores…
A: Null hypothesis (Ho): The average sleep quality of the 12 individuals is equal to the group average…
Q: Past research has indicated that the average age of 1. researcher would like to determine if the…
A:
Q: What is the optimal time for a scuba diver to be on the bottom of the ocean? That depends on the…
A: Since you have posted a question with multiple subparts, we will solve the first three subparts for…
Q: . In testing the hypothesis Ho : μ = 75 vs H₁ : µ ‡ 75, the following information is known: n=64, x…
A: Population mean (µ) = 75Standard deviations (σ) = √100 = 10Sample size (n) = 64Sample mean (x̅) = 78
Q: What is the optimal time for a scuba diver to be on the bottom of the ocean? That depends on the…
A: Note: As per the guidelines, solution to 3 subparts have been provided. Given information: x = depth…
Q: I need help understanding the null hypothesis and when to “reject” or “fail to reject” it. I got…
A: From the information, the values are given as follows: The value of the test statistic is, χ2=5.77…
Trending now
This is a popular solution!
Step by step
Solved in 2 steps
- Show all your work Indicate clearly the methods you use, because you will be scored on the correctness of your methods as well as on the accuracy and completeness of your results and explanations. Researchers are studying two populations of sea turtles, In population D. 30 percent of the turties have a shell length greater than 2 feet. In population E. 20 percent of the turtles have a shell length greater than 2 feet. Froma random sample of 40 turtes selected from D.15 had a shell length greater than 2 feet. From a random sample of 60 turtles selected fromE. 11 had a shell length greater than 2 feet. Let pry represent the sample proportion for D, and let p represent the sample proportion for E (a)What is the value of the difference pryPr?Show your work. (b) What are the mean and standard deviation of the sampling distribution of the difference in sample proportions p P:? Show your work and label each value. (c) Can it be assumed that the sampling distribution of the difference of the…1a) Use the normal approximation to find the indicated probability. The sample size is n, the population proportion of successes is p, and X is the number of successes in the sample.n = 100, p = 0.32: P(X < 34) b) A mail-order company has a 9% success rate. If it mails advertisements to 500 people, find the probability of getting fewer than 38 sales. c) Find the critical value zα/2 needed to construct a(n) 99.2% confidence interval. Please answer all parts of the question 1a to 1c. Thanks.question 2 Give the rejection region. Group of answer choices z greater than 1.64 t greater than 1.64 z greater than 1.58 t greater than 1.58 question 3 Give the test statistic. Group of answer choices z = 1.64 t = 1.58 t = 1.64 z = 1.58 question 4 Give the conclusion. Group of answer choices Reject the null since the test statistic is not in the rejection region. Fail to reject the null since the test statistic is not in the rejection region.
- What is the optimal time for a scuba diver to be on the bottom of the ocean? That depends on the depth of the dive. The U.S. Navy has done a lot of research on this topic. The Navy defines the "optimal time" to be the time at each depth for the best balance between length of work period and decompression time after surfacing. Let x = depth of dive in meters, and let y = optimal time in hours. A random sample of divers gave the following data. 16.1 23.3 29.2 38.3 51.3 20.5 22.7 2.68 2.18 1.88 1.03 0.75 2.38 2.20 (c) Find S, a, and b. (Round your answers to five decimal places.) e' Se a = b = (d) Find the predicted optimal time in hours for a dive depth of x = 38 meters. (Round your answer to two decimal places.) hr (e) Find an 80% confidence interval for y when x = 38 meters. (Round your answers to two decimal places.) lower limit hr upper limit hr (f) Use a 1% level of significance to test the claim that ß < 0. (Round your answers to two decimal places.) t = critical t = (g) Find a 90%…A researcher suspects that the mean birth weights of babies whose mothers did not see a doctor before delivery is less than 3000 grams. The researcher states the hypotheses as H:x = 3000 grams H, x 3000 grams; He:x< 3000 grams, where x = the mean birth weights of the sample of babies whose mothers did not see a doctor before delivery. Ho: x < 3000 grams; H,:x = 3000 grams, where x = the mean birth weights of the sample of babies whose mothers did not see a doctor before delivery. Ho: = 3000 grams; H # 3000 grams, where = the true mean birth weights of all babies whose mothers did not see a doctor before delivery. Ho: i = 3000 grams; H:< 3000 grams, where = the true mean birth weights of all babies whose mothers did not see a doctor before delivery. O Ho : š == 3000 grams; H. x 3000 grams, where x = the mean birth weights of the sample of babies whose mothers did not see a doctor before delivery.A previous study showed to determine whether a sales tax on soda will reduce consumption of soda in the US below the current per-capita level of about 50 gallons of soda per year. Hypotheses Test is Ho: m(mue) =50 vs. Ha: m<50 where m (mue) represents the average annual consumption of soda in communities where the sales tax is implemented. (b) Now supposed sample results give a p-value of 0.41. Interpret this p-value in terms of random chance and in the context of taxes and soda consumption.
- 9.Life on Other Planets Forty-seven percent of people believe that there is life on other planets in the universe. A scientist does not agree with this finding. He surveyed 100 randomly selected individuals and found 40 believed that there is life on other planets. At α=0.01, is there sufficient evidence to conclude that the percentage differs from 47%? Use the critical value method with tables. a) Find the critical value(s).= b) Compute the test value. z=11. A hypothesis test is conducted with H0 : µ = 46 vs. Ha: µ ≠ 46. The hypothesis test sample finds x̅ = 47.2, s = 5, and n = 81. The tail area in this test is P =20. Find the coefficient of skewness from the tollowing intormation : Difference of two quartiles = 8 Mode = 11 eboM %3D Sum of two quartiles = 22 Mean = 8 %3D
- p = proportion of students who drop out due to lack of economic resources A sociologist thinks that in his country the percentage of students who drop out due to lack of economic resources is different from 40%. identify 1. The research hypothesis H1 2. The null hypothesis HO 3. The rejection region of the null hypothesis Select one: 1. Н%: р 3D 0.4 2. Hо: р 2 0.4 3. (-00, -z] U [z,00) 1. H1: p + 0.04 2. Hо: р %3D 0.04 3. (-00, -z] U [z , 0) 1. H;: p = 0.4 2. Họ: p + 0.4 3. [z, 00) 1. H1: p + 0.4 2. Hо: р %3D 0.4 3. (-0о , -2]What is the optimal time for a scuba diver to be on the bottom of the ocean? That depends on the depth of the dive. The U.S. Navy has done a lot of research on this topic. The Navy defines the "optimal time" to be the time at each depth for the best balance between length of work period and decompression time after surfacing. Let x = depth of dive in meters, and let y = optimal time in hours. A random sample of divers gave the following data. x 16.1 26.3 29.2 38.3 51.3 20.5 22.7 y 2.68 1.98 1.48 1.03 0.75 2.38 2.20 (b) Use a 1% level of significance to test the claim that ? < 0. (Round your answers to two decimal places.) t = critical t =7. (4 pts) if fx(x) = 2x for 0 ≤ x ≤ 1 and Y = 10 – X², then find Fx (x) (remember to give the sample space).