What Proportion of Adults and Teens Text Message? A study of n = 2252 adults age 18 or older found that 72% of the cell phone users send and receive text messages. A study of n=800 teens age 12 to 17 found that 87% of the teen cell phone users send and receive text messages. What is the best estimate for the difference in the proportion of cell phone users who use text messages, between adults (defined as 18 and over) and teens? Give notation (as a difference with a minus sign) for the quantity we are trying to estimate, notation for the quantity that gives the best estimate, and the value of the best estimate. Be sure to clearly define any parameters in the context of this situation.

Q: The mean work week for engineers in a start-up company is believed to be about 62 hours. A newly…

A: From the given information, the number of observations is 8.

Q: How many people took part in this survey? * The table shows data about what type of phones that…

A: To arrange the data of two categorical variables, two ways contingency table is used. The first row…

Q: Survey was conducted about real estate prices. Data collected is 164350, 254687, 355521, 449174,…

A: Given data set164350, 254687, 355521, 449174, 574267, 679633, 722906, 863873, 975508, 1011950,…

Q: Students in a class were asked how many movies they had seen in the last month. The results are…

A:

Q: A survey shows that 3/5 Australian adults are overweight and 1/10 Australian adults are obese. What…

A:

Q: A survey of 250 households showed 91 owned at least one blower. Find an estimate for p, (proportion…

A: Given that there are total 250 households.  Among them, 91 owned at least one blower.

Q: A sociologist surveyed 16 single senior citizens living in private apartments. Each participant…

A: we have to construct  frequency  table .

Q: Find the weighted mean of the number of sheets on a roll of toilet paper: 7 brands have 22 sheets on…

A:

Q: ute the mean of 53, 22, 36, 63, 83.

A: Given data, 53, 22, 36, 63, 83. Mean=?

Q: Do histograms have to show grouped data? Can you use them for individual numbers as well as groups…

A: Introduction    from the above question we have to explain Do histograms have to show grouped data.…

Q: Suppose a sample of 158158 tankers is drawn. Of these ships, 135135 did not have spills. Using the…

A: It is given that, among 158 tankers 135 did not have spills.

Q: What is the z score for test scores of 70 and 90?  TEST SCORES: 50,60,61,63,66,67,73,82,89,92

A: From the provided information, The test scores are 50, 60, 61, 63, 66, 67, 73, 82, 89, 92

Q: Compute the mean of 26, 66, 38, 10, 27, 81.

A: mean=∑Xii=1nn

Q: In a poll of 556 human resource​ professionals, 42.3​% said that body piercings and tattoos were big…

A: Number of human resource​ professionals (n) = 556 Probability of success (p) = 42.3% = 0.423

Q: The 20 scores below were recored from a math test: 75, 64, 82, 68, 75, 73, 68, 78, 80, 97, 85, 68,…

A: Step-by-step procedure to obtain frequency distribution table using Excel: Select the data and go…

Q: Data was collected for 225 randomly selected 10-minute intervals. For each ten-minute interval, the…

A: The frequency distribution of the number of guests is given as follows:Number of…

Q: Is the Median a good way to represent the number of points scored per game for all the players?

A: Is the Median a good way to represent the number of points scored per game for all the players ?

Q: What's the IQV? Answer with TWO decimal digits.

A: Categories : { 1,2,3,4 } Frequency : { 1220,1563,716,590 } Percentage : { 29.8% , 38.2% , 17.5% ,…

Q: Compute the mean of 45, 23, 78, 27, 19, 12, 62.

A: Given : X = 45, 23, 78, 27, 19, 12, 62 n = 7 We want to find mean.

Q: Provide a table that summarizes the different ways to estimate the population mean and the…

A: A Table that summarizes the different ways to estimate the population mean and the population…

Q: What is the role of displays in statistics?

A: There are mainly two types of displays in statistics, such as, graphical representation and table or…

Q: Ministry of Human Resource conducts an annual salary online survey of accounting, finance, and…

A: t test

Q: 25% of pitchers are left-handed. a survey of 80 pitchers showed 27 are left-handed. find the point…

A: Solution:Point estimate: The population parameter which is estimated by using sample statistic is…

Q: Suppose a certain virus (sorry!) affects 0.3% of the population. A test used to detect the virus is…

A: 0.3% of 100000 population have virus.  0.3*100000/100= 300  people have virus.  88% have virus and…

Q: Describe about Variability within Groups.

A: There are two types of variability in ANOVA. They are, Between groups variability. Within group…

Q: find the relative risk for hypertension in females 50+ years versus females <50 years of age. (keep…

A: Now complete table from given information    Developed Hypertension  not develop Hypertension…

Q: A study showed that the cost of buying a basket of 40 slipper items was 6500 in Laguna, 4,300 in…

A: Given: Cost of buying a basket of 40 slipper item in Laguna =6500 Bataan=4300 Mandaluyong=5700…

Q: The mean salary of twelve men is $55,000, and the mean salary of four women is $85,000. Find the…

A: Mean or Average :

Q: A background measurement 5 times for 60 seconds and gets: [53,50,59,56,54]. Then measures 5 times…

A: Given that  A background measurement 5 times for 60 seconds and gets: [53,50,59,56,54]. Then…

Q: What's the mean? Answer with ONE decimal digit.

A: Given frequency distribution table…

Q: Mean=5 Mode=1 9,3,1,6, _,_, What are the two missing numbers

A: Step 1: Define the mean and the modeThe mean is the sum of all the values divided by the number of…

Q: Describe about Variability between Groups.

A: In ANOVA, the total variability can be split into various sum of squares (variations). They are sum…

Q: Does the population proportion and sample proportion always have the same value?

A: The question is about parametric inference.Introduction :Population proportion :The value of…

Q: A survey of the mathematics faculty at wassamatta university indicates that 9 faculty members are…

A: Given: A survey of the mathematics faculty at wassamatta university indicates that 9 faculty members…

Q: age for the 16 countries with over 100 million population (

A: Find the median age for the 16 countries with over 100 million population (besides the US).

Q: How many of the 3088 subjects used at least one prescription​ medication?

A: Number of adults aged 57 through 85 years in a survey, n = 3088 p be the probability that an adult…

Q: How to find the relative frequency Response Frequency Never 407 Rarely 648 Sometimes 927 Most of the…

A: In statistics, the frequency of an event A is the number n(A) of times the observation occurred/…

Estimation

A new framework of data analysis where the new statistical methods are used for interpreting the results and analyzing the data is known as estimation in statistics.