11/12 suppose the null hypothesis is rejected. Stupid conclusion based on the results of the test. Three years ago, the main price of a single-family home was $2 43, 753. A real estate broker believes that the mean price has decreased since then. Which of the following is the correct conclusion?

Q: A light bulb manufacturer wants to know if it can claim that, on average, its bulbs last more than…

A: The claim is that on average, the life time light bulbs last more than 1000 hours.

Q: 2. In a certain city, a school administrator hypothesized that students enroll in schools within 5…

A: It is interpreted that: n sample size=30x¯ sample mean=5.3s sample standard deviation=0.2

Q: Ackerman & Goldsmith (2011) found that students who studied text from printed hard copy had better…

A: From the provided information, Sample size (n) = 10 Sample mean (M) = 77 Sample standard deviation…

Q: well-known brand of pain relief tablets is advertised to begin relief within 24 hours. A simple…

A: Solution: Given information: n=18 Sample size x=24.8 hours Sample mean μ=24 hours Population mean s=…

Q: 9. A recent study stated that if a person chewed gum, the average number of sticks of he or she chew…

A: The hypothesized mean is 8.

Q: Choose the correct answer Problem 1 Customers often complain about long waiting times at restaurants…

A: Answer: From the given data,

Q: Which is cheaper: eating out or dining in? The mean cost of a flank steak, broccoli, and rice bought…

A: Here the sample is more than 30. Therefore z test can be used here.Null hypothesis:The mean cost of…

Q: 15) According to the U.S. Department of Agriculture, the average American consumed an average of 37…

A: From the provided information, Sample size (n) = 49 Sample mean (x̅) = 39 Standard deviation (s) =…

Q: A survey in a large class for first-year college students asked, "About how many hours do you study…

A: From the provided information, Sample size (n) = 498 Sample mean (x̅) = 15.3 hours Population…

Q: In the last quarter of 2007, a group of 64 mutual funds had a mean return of 2.7% with a standard…

A: For large sample size ( more than 30), let X be a random variable following normal distribution with…

Q: Suppose that memory for unrelated words is distributed normally with a mean of µ = 60 with a…

A: H0: μ = 60 versus Ha: μ ≠ 60 It is known that n= 25, M=55, σ=20 and α = 0.01. Here, the population…

Q: On average, Americans have lived in 3 places by the time they are 18 years old. Is this average less…

A: Given  mu=67,Xbar=2.6, s=1.4,alpha=0.05

Q: Which is cheaper: eating out or dining in? The mean cost of a flank steak, broccoli, and rice bought…

A:

Q: 1. A student is interested in the mean life span of males in his town. He has heard claims that the…

A: Given data : sample size, n = 48 sample mean, x̄ = 67.5 sample standard…

Q: For a certain brand of canned corn, the company claims that the mean weight of the contents of the…

A: We need to prepare Hypothesis statements

Q: A random sample of 41 adult coyotes in a region of northern Minnesota showed the average age to be x…

A: Given: n=41, x=2.07,S=0.84, μ=1.75, and α=0.01

Q: A researcher obtains a sample of n= 25 adults who are between the ages of 65 and 75. The researcher…

A:

Q: A Z company is testing a medicine intended to increase heart rate. A sample of 100 yielded a mean…

A: Statistical hypothesis testing is an important method in inferential statistics. It is used to test…

Q: 1. A consumer advocacy group suspects that a local supermarket's 10-ounce packages of cheddar cheese…

A:

Q: a)Test at the 1% significance level, do the data provide sufficient evidence to conclude that the…

A: (a) The sample size is 20, sample mean is 4.76, sample standard deviation is 2.30, and population…

Q: 50 high school students were asked how many hours they study per day. The mean was 1.5 hours, with a…

A: For claim H0:μ=1.2 hrs: The test statistic is, t=x¯-μsn=1.5-1.20.550=0.30.070710678=4.2426 The test…

Q: Ackerman & Goldsmith (2011) found that students who studied text from printed hard copy had better…

A: We start with defining some of the constants in the question: Sample size n = 10. Population mean…

Q: 1) According to Consumer Expenditures, the average consumer spent $1729 on apparel and services in…

A: Since you have asked multiple questions, we will solve the first question for you. If you want a…

Q: 11.) A 2010 newspaper article reported that the national average for calorie consumption of…

A: Given,sample size(n)=1200sample mean(x¯)=2650population standard deviation(σ)=120α=0.05

Q: Test the null hypothesis that the st. deviation of daily return is 2% against the alternative that…

A: Given:n =  251.0s =  0.0112 The Hypothesis test:Ho:σ=0.02Ha:σ≠0.02

Q: 1. According to the school librarian, the average number of pages of books in the reference section…

A: Hi! Thank you for the question, As per the honor code, we are allowed to answer one question at a…

Q: 5. A microwave company claims that their microwaves can pop popcorn in under 2.25 minutes. After 134…

A: From the provided information, Sample size (n) = 134 Sample mean (x̅) = 2.5 Sample standard…

Q: In the last quarter of​ 2007, a group of 64 mutual funds had a mean return of 3.4​% with a standard…

A:

Q: A. A researcher used a developed problem solving test to randomly select 50 Grade 6 pupils. In this…

A: Write the null and alternative hypothesis as: Ho:u=75H1:u≠75

Q: 4. A manufacturer claims that the average life of batteries use in their electronic games is 150…

A:

Q: A manager will switch to a new technology if the production process exceeds 80 units per hour. The…

A: Solution solution  given data μ x= 83 , n =25 , σ=8to test the hypothesis we will use ztest for…

Q: A hospital president claims that the average salary of registered nurses at her hospital is more…

A: Note: Hi there! Thank you for posting the question. As there are several independent questions,…

Q: Suppose the null hypothesis is rejected. State the conclusion based on the results of the test.…

A: Given information- We have given that the null hypothesis is rejected. The mean price of a…

Q: The director of a medical hospital feels that her surgeons perform fewer operations per year than…

A: Given information- Population mean, μ=211 Sample size (n) = 15 Sample mean, X=208.8 Sample standard…

Q: Q.5.2 The CEO of a large financial institution claims that, on average, their clients invest more…

A:

Q: e 19-4. Godrej soap manufacturing company was distributing a particular brand of soap through a…

A:

Q: one-tailed or two-tailed test?                    H0:                        HA: alpha: z value= σM…

A:

Q: parate sheet of paper 1. The school head observes an increase of internet expenditures of learners…

A: As per our policy we can solve only 1 question per post. Kindly repost for remaining questions. 1)…

Q: A researcher knew that before cell phones, a person made on average 2.8 phone calls per day. She…

A: The hypotheses of the test are given as follows: 1). Null hypothesis: µ=2.8. 2). Alternative…

Q: The mean balance of all checking accounts at a local bank for July 2020 was P8 500. A random sample…

A:

Q: The mean balance of all checking accounts at a local bank for July 2020 was P8 500. A random sample…

A:

Q: 1. The daily yield for a local chemical plant has averaged 880 ton for the last several years. The…

A: As per Bartleby guideline if more than one question is asked only first question to be answered…

Q: 3. A IV commercial claims that the mean cost of a funeral today is above $8000. A survey of 233…

A:

Q: 1. A psychology professor of a large class became curious as to whether the students who turned in…

A: Given information- Sample size, n = 20 Population mean, µ = 75 Population standard deviation, σ = 10…

Q: A random sample of 85 eighth grade​ students' scores on a national mathematics assessment test has a…

A:

Q: According to Consumer Expenditures, the average consumer spent $1729 on apparel and services in…

A: Given information- Population mean, μ = $1729 Sample size, n = 36 Sample mean, x-bar = $1667.11…

Q: 1. In the past, a chemical company produced 880 pounds of a certain type of plastic per day. Now,…

A:

Q: 1-You are a psychological examiner for a school- the last class you tested had an IQ mean of 134 and…

A: Null hypothesis: µ=127. Alternative hypothesis: µ≠127. Here, the sample mean, x-bar is 134.…