Math

StatisticsQ&A LibraryIn Exercises 21–24, assume that when adults with smartphones are randomly selected, 54% use them in meetings or classes (based on data from an LG Smartphone survey).If 20 adult smartphone users are randomly selected, find the probability that exactly 15 of them use their smartphones in meetings or classes.Question

Asked Jan 21, 2020

40 views

In Exercises 21–24, assume that when adults with smartphones are randomly selected, 54% use them in meetings or classes (based on data from an LG Smartphone survey).

If 20 adult smartphone users are randomly selected, find the probability that exactly 15 of them use their smartphones in meetings or classes.

Step 1

According to the provid...

Tagged in

Find answers to questions asked by student like you

Q: Mendelian Genetics When Mendel conducted his famous genetics experiments with peas, one sample of of...

A: Click to see the answer

Q: USA Today reported that Parkfield, California, is dubbed the world's earthquake capital because it s...

A: Given thatSince 1857, Parkfield has had a major earthquake one the average of 1.3 times every 22 yea...

Q: Significance with Range Rule of Thumb. In Exercises 31 and 32, assume that hybridization experiments...

A: a.Mean:The mean number of peas with green pods in the groups of 16 is,

Q: Describe the simulation procedure. (For example, to simulate 10 births, use a random number generato...

A: Step-by-step procedure for simulating 20 peas using the TI-83/84 Plus calculator:Turn on the graphin...

Q: Oscars In the 87th Academy Awards, Eddie Redmayne won for best actor at the age of 33 and Julianne M...

A: Formula for z-score is,

Q: Three Children Use this sample space listing the eight simple events that are possible when a couple...

A: Solution: We are given the below possible outcomes when a couple have three children:{bbb, bbg, bgb,...

Q: Average The defunct website IncomeTaxList.com listed the “average” annual income for Florida as $35,...

A: Solution: We are given that:The defunct website IncomeTaxList.com listed the “average” annual income...

Q: Bootstrap Sample Here is a random sample of taxi-out times (min) for American Airlines flights leavi...

A: Bootstrap sample:In general, a bootstrap sample is a smaller sample that is bootstrapped from a larg...

Q: Significance with Range Rule of Thumb. In Exercises 29 and 30, assume that different groups of coupl...

A: (a)

Q: World Series. TheWorld Series in baseball is won by the first team to win four games (ignoring the 1...

A: a.The random variable X denotes the number of games that it takes to complete a World Series and the...

Q: Type I and Type II Errors. In Exercise, identify expressions that identify the type I error and the ...

A: Click to see the answer

Q: Black Cars Use subjective probability to estimate the probability of randomly selecting a car and ge...

A: In this context, the information about the colors of cars is not provided. So, consider as given bel...

Q: Sketch the area under the standard normal curve over the indicated interval and find the specified a...

A: Procedure for drawing normal curve:The normal curve of the data can be draw by using EXCEL. The soft...

Q: Finding Odds in Roulette A roulette wheel has 38 slots. One slot is 0, another is 00, and the others...

A: (a)The possible outcomes are 0, 00, 1, 2,..., 36. The total number of outcomes is 38. And, there are...

Q: Requirements A quality control analyst has collected a random sample of 12 smartphone batteries and ...

A: Here, it is given that the random sample of 12 smartphone batteries.We can use the method of t distr...

Q: A factorial experiment was designed to test for any significant differences in the time needed to pe...

A: The ANOVA table constructed below: From the given information, factor A is defined as translator sys...

Q: Football Player Numbers Listed below are the jersey numbers of 11 players randomly selected from the...

A: In this case, we need to find the mean, median, mode and midrange for the given data.The formula for...

Q: Probability of At Least One Let A = the event of getting at least 1 defective iPhone when 3 iPhones ...

A: Let A be the event of getting at least 1 defective iPhone when 3 iPhones are randomly selected with ...

Q: Sleep Q3 For a sample of 80 sleep times, approximately how many of those times are less than Q3?

A: Click to see the answer

Q: Finding Confidence Intervals. In Exercises 9–16, assume that each sample is a simple random sample o...

A: Click to see the answer

Q: YSORT Gender Selection MicroSort’s YSORT gender-selection technique is designed to increase the like...

A: Let event A denotes that the birth resulted is a baby boy by using MicroSort’s YSORT gender selectio...

Q: Fast Food Drive-Thru Accuracy If two orders are selected, find the probability that they are both fr...

A: a)The total number of orders for each popular fast food chain is obtained as shown in Table (1).

Q: Fast Food Drive-Thru Accuracy If one order is selected, Find the probability of getting food that is...

A: The total number of orders for each popular fast food chains is obtained as shown in the Table (1).

Q: Regarding outliers: a. What is an outlier?b. Explain how you can identify potential outliers, using ...

A: (a)Justification:Outlier:An outlier cause variability in the measurement or it will cause experiment...

Q: Heights The boxplot shown below results from the heights (cm) of males listed in Data Set 1 “Body Da...

A: The box plot contains 5-number summary. That is, the minimum value, the first quartile, the second q...

Q: Wi-Fi Based on a poll conducted through the e-edition of USA Today, 67% of Internet users are more c...

A: Preliminary calculation:67% of Internet users are more careful about personal information when using...

Q: In Problems, a.identify the population and variable under consideration. b.use the technology of you...

A: a)Population and variable:The complete set of observations for a particular study that can be studie...

Q: Accrotime is a manufacturer of quartz crystal watches. Accrotime researchers have shown that the wat...

A: (a) Percentage of total production will the company expect to replace:The percentage of total produc...

Q: In Exercises 21–24, assume that when adults with smartphones are randomly selected, 54% use them in ...

A: Define the random variable x as the number of adults who use their smartphone during meetings or cla...

Q: the following table shows 4 rows from a frequency distribution table for a sample of n=50 scores. Us...

A: The percentile rank for x=13 is 38 and it is calculated below:Formula for percentile Rank:

Q: Redundancy in Computer Hard Drives It is generally recognized that it is wise to back up computer da...

A: a)The probability of a hard disk failure during a year, if all the data is stored in a single drivei...

Q: Identifying Binomial Distributions. In Exercises 5–12, determine whether the given procedure results...

A: The given procedure follows binomial distribution if it satisfies the below requirements:There are a...

Q: Foot Lengths Listed below are foot lengths in inches of randomly selected Army women measured in the...

A: In this case, we need to find the mean, median, mode and midrange for the given data.The formula for...

Q: P-values In Exercises 17–20, do the following: a. Identify the hypothesis test as being two-tailed, ...

A: Given that,The test statistic,z=1Claim that p > 0.3.

Q: There are 80 questions from an SAT test, and they are all multiple choice with possible answers of a...

A: Define the random variable x as the number of correct answers. Here, the number of questions (n) is ...

Q: Cell Phone Radiation Listed below are the measured radiation absorption rates (in W/kg) correspondin...

A: In this case, we need to find the mean, median, mode and midrange for the radiation absorption rates...

Q: Determine the treatment group, control group, and treatment for the following study:A researcher may...

A: Click to see the answer

Q: Bank Queues Waiting times (in seconds) of customers at the Madison Savings Bank are recorded with tw...

A: In this case we need to find the coefficient variation for the waiting times of customers in single ...

Q: Notation When randomly selecting an adult, A denotes the event of selecting someone with blue eyes. ...

A: Let the event A denote the randomly selected adult with blue eyes.Probability:The probability of hap...

Q: SAT Test. In Exercises 15–20, assume that random guesses are made for eight multiple choice question...

A: The probability that at least one answer is correct is,

Q: Identifying Binomial Distributions. In Exercises 5–12, determine whether the given procedure results...

A: The given procedure follows binomial distribution if it satisfies the below requirements:There are a...

Q: Write a sentence in your lab report explaining the effect that adding the two new data points had on...

A: From the given information,Original data points = {60,31,50,48,50,54,56,62,53}New additional points ...

Q: Determine if the variable is qualitative or quantitative. If quantitative, then also state if the va...

A: Variable:A variable is any characteristic that is recorded for each case.Categorical variable:A cate...

Q: Is a probability distribution defined if the only possible values of a random variable are 0, 1, 2, ...

A: Requirements:

Q: In Exercises 1–5, assume that 74% of randomly selected adults have a credit card (based on results f...

A: From the provided information,The percentage of adults who have credit cards = 74%Probability (p) = ...

Q: A national survey asked 1261 U.S. adult fast-food customers which meal they ordered. A) identify var...

A: VARIABLE:A variable is any characteristic that is recorded for each case.A variable is an attribute ...

Q: Boxplot Comparison Refer to the boxplots shown below that are drawn on the same scale. One boxplot r...

A: The box plots for the weights of men and women are given.

Q: Vitamin C and Aspirin A bottle contains a label stating that it contains Spring Valley pills with 50...

A: GivenVitamin C and Aspirin A bottle contains a label stating that it contains Spring Valley pills wi...

Q: Computers As a quality control manager at Texas Instruments, you find that defective calculators hav...

A: To plot the causes for defective calculators like including worn machinary, Human error, Bad supplie...

Q: In the following problem, check that it is appropriate to use the normal approximation to the binomi...

A: Hey there! Thank you for posting the question. However, since your question has more than 3 sub part...