A study suggests that the 25% of 25 year olds have gotten married. You believe that this is incorrect and decide to collect your own sample for a hypothesis test. From a random sample of 25 year olds in census data with size 776, you find that 24% of them are married. A friend of yours offers to help you with setting up the hypothesis test and comes up with the following hypotheses. Indicate any errors you see. H0:^p=0.24 HA:^p≠0.24

Q: A city office has previous records indicating that 18% of cars have received parking tickets at some…

A: Given Information: 18% of cars have received parking tickets at some point. A new program was…

Q: A sample of 1500 computer chips revealed that 27 % of the chips fail in the first 1000 hours of…

A: Given : A sample of 1500 computer chips revealed that 27 % of the chips fail in the first 1000 hours…

Q: A random sample of 54 students from Cabrillo College are selected from a normal population with mu…

A: We have to find correct statement for given. Data

Q: If we have a sample of size 100 with sample mean breaking strength of 975 pounds from a population…

A: State the hypotheses. That is, there is no sufficient to conclude population mean breaking strength…

Q: For a one-tailed test (upper tail) with a sample size of 900, the null hypothesis will be rejected…

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

Q: Recently, a large academic medical center determined that 10 of 25 employees in a particular…

A:

Q: A sample of n=25 individuals is randomly selected from a population with a mean of p=65, and a…

A: Given that   x̄ =70 ,  μ = 65  , s = 20 , n =25   Test statistic ( t  )  t = ( x̄ -  μ  )/(s/√(n)

Q: The local swim team is considering offering a new semi-private class aimed at entry-level swimmers,…

A: Solution: From the given information, the claim is that the population mean is less than 15.

Q: University officials hope that changes they have made have improved the retention rate. Last year, a…

A: Solution-: Let, p_1 and p_2 be proportion of population1 and population 2 respectively. Given: We…

Q: The records of a casualty insurance company show that, in the past, its clients have had a mean of…

A:

Q: he records of a casualty insurance company show that, in the past, it’s clients have had a mean of…

A: Given that SD=0.06

Q: An assembly line machine is supposed to turn out ball bearings with a diameter of 1.25 centimeters.…

A:

Q: A sample of 1600 computer chips revealed that 42 % of the chips do not fail in the first 1000 hours…

A: Given : population proportion , p = 39 % = 0.39

Q: d in testing if this sample provides evidence that the proportion of Americans who are dissatisfied…

A: Consider the null hypothesis H0 and alternate hypothesis Ha given as: H0:μ=0.5Ha:μ≠0.5 Given,…

Q: ds of a casualty insurance company show that, in the past, its clients have had a mean of 1.7 auto…

A: Here it is given that- Mean (μ) = 1.7 Variance (δ2) = 0.0036

Q: Recently, a large academic medical center determined that 8 of 19 employees in a particular position…

A: Solution: Given data X = 8 n =19 Pi = .54 Level Of significance = 0.05

Q: A sample of n=25 individuals is randomly selected from a population with a mean of u=65, and a…

A: For the given data perform t test for one mean

Q: The records of a casualty insurance company show that, in the past, its clients have had a mean of…

A: The claim of the test is that, the standard deviation of the number of accidents per day is no…

Q: Recently, a large academic medical center determined that 8 of 15 employees in a particular position…

A:

Q: A researcher administers a treatment to a sample from a population with a mean of m=50. If the…

A: Claim : the treatment is expected to increase scores.

Q: If a previous researcher had predicted a population mean of 10 casual friends per person, could that…

A: Null Hypothesis:    H0: µ =10.   That is,   Alternate Hypothesis:   Ha: µ≠10   That is, the…

Q: Two different simple random samples are drawn from two different populations. The first sample…

A: We have find critical value...

Q: A teacher giving a true/false test wants to make sure her students do better than they would if they…

A: It is given that the level of significance is 0.10.

Q: A medical researcher wants to determine if the average hospital stay of patients that undergo a…

A:

Q: A newsletter publisher believes that over 54% of their readers own a personal computer. Is there…

A: The null hypothesis and the alternative hypothesis are given below:

Q: Recently, a large academic medical center determined that 13 of 22 employees in a particular…

A:

Q: A random sample of 154 recent donations at a certain blood bank reveals that 87 were type A blood.…

A:

Q: The records of a casualty insurance company show that, in the past, its clients have had a mean of…

A: We have to find null and alternative hypothesis...

Q: One-Sample Statistics Mean Std. Deviation Std. Error Mean Wage (median weekly wage) 16 440.75 91.394…

A: Note: As per the guidelines, only first three sub-parts have been solved here. Given data: Sample…

Q: University officials hope that changes they have made have improved the retention rate. Last year, a…

A: Given that  Sample sizes n1=2049 , n2=1942 Favorable cases x1=1537 , x2=1516

Q: The mayoral challenger claims that less than 30% of residents over the age of 25 have bachelor’s…

A:

Q: It is expected that a treatment will reduce scores on a variable. If α = .05, what is the critical t…

A: According to the provided information, α = .05 n = 15 df = n-1 = 15-1 = 14

Q: A newsletter publisher believes that over 20 % of their readers own a Rolls Royce. For marketing…

A: In this case, a test is required to see whether over (more) than 20% of the reader owns a Rolls…

Q: Past studies have indicated that the percentage of smokers is estimated to be about 35%. Given the…

A: a) From the given information, the claim of the problem is the percentage of smokers has reduced.…

Q: Based on certain data, a null hypothesis is rejected atthe 0.05 level of significance. Would it also…

A: Concept of p-value: The p-value in hypothesis testing is the probability of obtaining a test…

Q: Country Magazine reports that celebrity MySpace accounts have an average of 4 million friends.…

A: We have given that, Mu = 4 , Xbar = 3 , n =43 . We have to find , Which is the best set of…

Q: The body weight of a healthy 3-month-old colt should be about u = 66 kg. (a) If you want to set up a…

A: From the provided information, Population mean (µ) = 66 kg

Q: The records of a casualty insurance company show that, in the past, its clients have had a mean of…

A: claim for the test is the actuaries of the company claim that the variance of the number of…

Q: The records of a casualty insurance company show that, in the past, its clients have had a mean of…

A: From the provided information, Standard deviation (σ) = 0.04 Mean (x̅) = 1.9 The claim is that the…

Q: The records of a casualty insurance company show that, in the past, its clients have had a mean of…

A: Given information- Population mean, μ = 1.9 Population variance, σ2 = 0.0016 Claim- the variance of…

Q: The records of a casualty insurance company show that, in the past, its clients have had a mean of…

A: Given, Client had the mean 1.7 auto accidents per day and variance is 0.0016

Q: The records of a casualty insurance company show that, in the past, its clients have had a mean of…

A: The claim is that the standard deviation of the number of accidents per day is no longer equal to…

Q: If we have a sample of size 100 from a population of rope with sample mean breaking strength of 1040…

A: A type two error is an error in hypothesis testing which occurs when we fail to reject the null…

Q: (a) At a 5% level of significance, is there evidence that Dan is correct? (Type: Yes or No): (b) At…

A: Given info: It is given that from a random sample of 11 bags of potato chips he calculated P value…

Q: The U.S. Postal Service (USPS) is faced with the issue of a large portion of mail (letters and…

A: The random variable X follows binomial distribution. X ~ B (n, p) The population proportion is 0.06.…

Q: The records of a casualty insurance company show that, in the past, its clients have had a mean of…

A: Here we want to know the null and alternative hypothesis.

Q: he records of a casualty insurance company show that, in the past, its clients have had a mean of…

A:

Q: In a survey taken in 2020, 20 out of 50 women and 17 out of 45 men said that they felt our country…

A: Given , Women sample : Sample size = n1 = 50 Number of women who felt our country was headed in the…

Q: Common Sense Media surveyed 1000 teens and 1000 parents of teens to learn about how teens are using…

A: Solution: Given information: n1=1000 Sample size of teensn2=1000 Sample size of parents x1= 279…

Q: The records of a casualty insurance company show that, in the past, its clients have had a mean of…

A: From the provided information, The records of a casualty insurance company show that, in the past,…

2-Proportion Test

In a 2-proportion test, two separate proportions are measured at the same time, and their similarity is evaluated. It is also known as a 2-proportion z-test, and a comparison of two different proportions is done in this method.