Claim: Fewer than 94​% of adults have a cell phone. In a reputable poll of 1148 ​adults, 88​% said that they have a cell phone. Find the value of the test statistic. The value of the test statistic is   nothing. ​(Round to two decimal places as​ needed.)

Q: esearch scientist wishes to test the claim that the mean number of units taken by community college…

A: From the given information, We see that no information about the normality of the population is…

Q: You are doing a problem where you have a negative z-score, and you have to look up the proportion of…

A: When we have area to the left from our z-score and we are looking for the proportion that we shaded.…

Q: Use the expression in the accompanying discussion of sample size to find the size of each sample if…

A: Given Assuming sample proportion, p^1=p^2=0.5 as there is no prior estimate. Margin of error, E=0.06…

Q: Use the display of data to find the mean, median, mode, and midrange. (Round to the nearest tenth as…

A:

Q: Give the value of the test statistic. (Enter your answer rounded to two decim

A: Excel Procedure: Enter the data of No odor in column A. Enter the data of lavender in column B.…

Q: Claim: Fewer than 91% of adults have a cell phone. In a reputable poll of 1084 adults, 86% said that…

A:

Q: According to College Board the scores on the AP History exam are normally distributed with N(72,…

A:

Q: The responses of a sample of 5276 shoppers who were asked how their purchases are made are shown in…

A: The total sample size, i.e., the number of sampled responses, n=5276.The frequency distribution of…

Q: The mode score on a statistics exam was 83. Which of these interpretations is correct? A.More…

A: Given information Mode score on a statistics exam = 83 Mode = The number having highest frequency is…

Q: Three students were applying to the same graduate school. They came from schools with different…

A: We have given that three students were applying to the same graduate school. They came from schools…

Q: A study wanted to test whether the twins have the same level of intelligence. A sample of 9 twins…

A: Given: Sample size for Twin-1 n1 = 9 Sample size for Twin-2 n2 = 9 Twin-1 130 95 100 125 120 130…

Q: 4. Mark the three quartiles on the histogram below. Please explain why, how, etc., you made that…

A: The histogram for the income in dollars is given in the question.The three quartiles need to be…

Q: Calculate the z score for salary (in dollars per hour) x = 40 dollars. Use this sample data. 55,…

A: The data is given by,55, 78, 18, 27, 51, 51It is required to compute the z-score for x=40A z-score…

Q: 1. From the following data, 8, 7, 9, 6, 8, 10, 9, 9, 5, 7, 4, 11,2 a) Find the Median, Lower…

A: Given data in ascending order is shown below 2, 4, 5, 6, 7, 7, 8, 8, 9, 9, 9, 10, 11 n = 13

Q: calories burned is actual less than 546, and find the P-value. On the basis of the P-value, should…

A: It is given that  Population mean, μ = 546 Sample mean, x̅ = 544.8 Population standard deviation, σ…

Q: Interpret the quartiles. Choose the correct answer below.

A: to find to interpret quartiles.

Q: Use technology to perform two-sample t-test to determine whether there is a difference in the mint…

A: Two sample t -test    To determine whether there is difference in the mint dates and the values of…

Q: Job Applicants The Society for Human Resource Management conducted a survey of 347 human resource…

A: a)Here, the number of respondents or the human resource professionals are 347 and 73% reported that…

Q: Three students were applying to the same graduate school. They came from schools with different…

A: Given: Data on GPA of three students applying to the same graduate school. The z score for Thuy with…

Q: Use the sample data and confidence level given below to complete parts (a) through (d). A research…

A:

Q: Use the expression in the accompanying discussion of sample size to find the size of each sample if…

A:

Q: A student takes a multiple-choice test that has 6 questions. Each question has four choices. student…

A: It is given that,  A student takes a multiple-choice test that has 6 questions i.e. n=6 Each…

Q: A recent Nielsen analysis found that the typical U.S. smartphone user is spending an average of 220…

A: The random variable time follows normal distribution. The sample mean is 205. The sample standard…

Q: A food distribution company claims that a fast food restaurant chain receives, on average, 24 pounds…

A: GivenMean(μ)=22.2standard deviation(s)=4.3sample size(n)=42significance level(α)=0.04

Q: a) Calculate the margin of error for the proportion of all U.S. adults who think things are on the…

A: It is given that  Proportion for wrong track, p = 75% = 0.75 Sample size, n = 1997 Confidence level…

Q: you wish to estimate the mean cholesteral levels of patients two days after they had a heart attack.…

A: Individual:The collected data which can be associated with a single element in the sample is called…

Q: eights were measured from 35 college students in September and April of th ar.What statistical test…

A: Weights is the continuous quantity and if the population follow normal distribution then the two…

Q: A publisher reports that 78 % of their readers own a laptop. A marketing executive wants to test the…

A: Sample of size(n)=120Population proportion(P)=0.78Sample proportion()=0.71

Q: A software company is interested in improving customer satisfaction rate from the 77% currently…

A: Solution: Given data p = 0.77 sample size (n) = 248 x = 202 Sample Proportion is given  by; (p̂) =…

Q: Use the expression in the accompanying discussion of sample size to find the size of each sample if…

A:

Q: A publisher reports that 52 % of their readers own a laptop. A marketing executive wants to test the…

A: We have to find the test statistics.

Q: 2. For Americans using library services, the American Library Association claims that at most 70% of…

A: Given: The random sample of patrons selected are n=100. The number of patrons who borrowed books are…

Q: We have provided simple data sets for you to practice the basics of finding measures of center. For…

A: a. The mean of the data is calculated as follows:

Q: We have provided simple data sets for you to practice the basics of finding measures of center. For…

A:

Q: Is the sample mean, calculated from a random sample, an unbiased estimator of the population mean?…

A:

Q: Siven this information, which statement is true? A The mean and median have the same value. B The…

A: Given: data To find  the correct statement

Q: You are a data scientist investigating a new dataset you just received. After some preliminary…

A: Given,Q2=median=81.45Q3=86.71IQR=10.05

Q: Twenty years ago, 52% of parents of children in high school felt it was a serious problem that high…

A: Given : n = 700 p = 0.52

Q: 7. Calculate the mean, median, and mode for the following set of data: 8e 84, 75, 76, 88, 72, 71,…

A: the mean is calculated using the formula as follows  Mean = sum of observationnumber of observation…

Q: A sample of 900 computer chips revealed that 46 % of the chips do not fail in the first 1000 hours…

A: Given,Sample size, n = 900Sample proportion,  = 46% = 0.46The company's promotional literature…

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.