need help with question b
Q: A sample of eight observations is taken from a normal distribution with unknown mean. The sample…
A: Answer: From the given data, Sample size (n) =8 Sample mean (x-) = 6.92 Population standard…
Q: Which is true of a cumulative frequency chart? As we move along the x-axis, the bars of the chart…
A: Given that We have to find the cumulative frequency chart: a..As we move along the x-axis, the…
Q: Consider the following regression equation representing the linear relationship between the Canada…
A: Given that We have to find a..As the net annual family income increases, does the Canada Child…
Q: . The disadvantage of re-expressing variables is that A. We have to explain the association in terms…
A: The correct option is E. (A and D).
Q: 3. 3 Σ (7X + Y) 1 Σία (Χ. 15127) 2. Σε (x -27) Lis1
A: Expanded form of given expressions.∑i=137Xi+Yi , ∑i=14Xi2-2Yi and ∑i=12Xi+3Yi+2Zi
Q: Graduate School Yes No Total Select one: Sellors resulted in the following crosstabulation regarding…
A: graduate school business engineering others total yes 35 42 63 140 no 91 104 65 260 total 126…
Q: What is the probability that six or more adults from this sample were between 25 and 34 years old?
A: Given that n = 9 , p = 25% = 0.25 , q = 1 - p = 1 - 0.25 = 0.75 X ~ Binomial (n = 9 , p = 0.25) X =…
Q: If the null hypothesis Ho : mean = 17.0 is rejected at alpha = 0.01 when a mean of 21.0 is…
A: Solution-: Given: α=0.01, x¯=21 Null hypothesis: H0:μ=17 If the null hypothesis H0:μ=17 is…
Q: A department at a school comprises 10 faculty and 8 administrators. They organize a committee of…
A:
Q: A particular part that is used as an injection device is sold in lots of 10. The producer deems a…
A: Hint: The Hypergeometric Distribution describes the probability of success of the random sample,…
Q: For the following hypotheses, identify the independent and dependent variables. States with more…
A: Independent variables are those control by experimenters and dependent variables (response…
Q: The phone lines to an airline reservation system are occupied 30% of the time. Assume that the…
A:
Q: Given R² = 0.3129 and SSR = 0.3129 and SSR = 88.68, compute SST. SST = Round to 2 decimal places.
A: Given, R2 =0.3129 and SSR = 88.68
Q: A 2019 PEW research center survey of 10,000 U.S. adults asked whether gun laws should be More…
A: Given r=Number of rows=3 and c=numbers of columns=2 Level of significance ɑ=0.05
Q: given in the table. Make a frequency distribution for grouping Honda car types Create a polygon…
A: Car Type Price (in Millions) City type Z pesona 157 City VTEC 1500cc M/T 174 City VTEC 1500cc…
Q: 15) A and B are events such that P(AUB) = 4 1 P(A^B)=; ‚and P(Ã)= ²3. 4 Find P(A|B).
A: Answer: From the given data, P(A∪B) = 3/4 P(A∩B) = 1/4 P(A-) = 2/3 ⇒P(A) = 1 - P(A-) = 1 - (2/3) =…
Q: 8. All but one of the statements below contain a mistake. Which one could A. The correlation between…
A: Dear students as per guidelines we solve only first question when questions are different. Solution…
Q: The lack of memory property wherein the count of the number of trials until the next success can be…
A: It is given that the statement about to the lack of memory property. Here need to find out that the…
Q: Let P(A) = p, P(A | B) = q, P(B | A) = r. Find relations between the number p, q, r for the…
A:
Q: hat is the mode (or modes) for thi
A: A pie chart is a form of graph that uses circular data recording and then divides the data into…
Q: Assuming that the population is normally distributed, construct 99% confidence interval for the…
A: Data given Sample A: 1, 4, 4, 4, 5, 5, 5, 8 Sample B: 1, 2, 3, 4, 5, 6, 7, 8
Q: If you had 56 pieces of data and wanted to make a histogram, how many bins are recommended? 4-5 6…
A: Solution
Q: Suppose we are interested in bidding on a piece of land and we know one other bidder is interested.…
A: Given that The seller announced that the highest bid in excess of $10,000 will be accepted. Assume…
Q: How many ways can an adviser choose 4 students from a class of 12 if they are all assigned the same…
A:
Q: Let the sample space be S={1, 2, 3, 4, 5, 6, 7, 8, 9, 10}. Suppose the outcomes are equally likely.…
A: Given that Sample space =S S={1, 2, 3, 4, 5, 6, 7, 8, 9, 10} S=10
Q: Attempting to improve the quality of services provided to customers, the owner of a chain of…
A: The objective is to validate if the training of the sales personnel is truly effective, i.e., the…
Q: Example 4.7 Data is: 4, 4, 5, 6, 8, 9, 10, find Percentile matching estimate of (c) parameter μ, o2…
A: Data given 4,4,5,6,8,9,10
Q: From past experience, it is known that, on the average, 10% of welds performed by a particular…
A: Since you have posted a question with multiple sub-parts, we will solve first three subparts for…
Q: Make a tree diagram to show all the possible sequences of answers for four multiple-choice…
A:
Q: Data and summary statistics about college professor's salaries teaching at the Master's level was…
A: given data mound shaped distribution for salaries, ∴ X~N(μ,σ)μ1 = 67691μ2 = 65323σ1 = 14506σ2 =…
Q: Find the two values for chi-squared when alpha = 0.10 and n = 28
A: Given that Sample size n =28 Level of significance =alpha =0.10
Q: How many different letter arrangements can be made from the letters in the word PROBABILITY? a)…
A: Given word is "PROBABILITY"
Q: reports that the average expenditure on Valentine's Day was expected to be $100.89. Do male and…
A: Given that Sample sizes n1=60 , n2=37 Sample means X̄1=133.15 , X̄2= 60.72 ?1 =31…
Q: What can you conclude? show step by step procedure using BOTH p-value and critical region Explain…
A: 1. Given The given data is as follows: Sample size, n=9 The levels (in MPN/g) were: 0.593, 0.142,…
Q: Calculation of a mean is most appropriate for which of the following sets of data? Attitudes of…
A:
Q: Determine the area under the standard normal curve that lies to the left of (a) Z= -0.09, (b)…
A: Given data,area under the stndard normal curve that lies to left of z score =?we have to find out…
Q: 6. You conducted a census. Explain why descriptive statistics are statistics are not needed. helpful…
A: 6. Introduction The descriptive statistics is used for describing the features of the data whereas…
Q: Write an equation in the form y = mx + b for the following table: y = X -4 -2 0 4 680 2435 y -19 -7…
A:
Q: Covid-19 ward nurses worry about the number of arriving patients in their ward. In a typical…
A: given data x = no. of patients arrive in t hoursλ = 5 arrives per hourP(x=X) = e-λt(λt)xx!…
Q: The table shows the weekly income of 20 randomly selected full-time students. If the student did not…
A: Data given 565,521,569,189,592,250,222,504,0,206,3356,443,0,277,194,227,114,0,0,505
Q: The brain volumes (cm3) of 20 brains have a mean of 1143.3 cm3 and a standard deviation of 129.9…
A: Introduction: It is required to find the limits separating the significantly lower and higher…
Q: Use 2 decimal places in your final 3. A new office park is considering to start an express bus…
A: Utility of bus(based on data) = -3.6075 Utility of Automobile (based on data) = -1.58 Note: Put…
Q: The accompanying table shows a bookstore's estimated demand for a new calendar. The bookstore needs…
A: Given Information: Demand Probability 100 0.40 200 0.30 300 0.30 Each calendar costs the…
Q: A surgical technique was performed on twelve patients last week. You are told there is an 88% chance…
A: Givensample size(n)=12p=0.88Let "x" be the surgery successful for no.of…
Q: An LCBO employee compares the relationship between the price of 6 different vintage bottles of wine,…
A: Given data is No.of wine bottles purchased in a last 3 month(x) Price of wine bottle($) 44 25…
Q: The survival time of a certain type of mosquito in days following adult emergence is assumed to…
A: Let X be the survival time of a certain type of mosquito in days following adult emergence is…
Q: Based on the data shown below, calculate the correlation coefficient (rounded to three decimal…
A:
Q: The probability of a successful SSD read-write during shock tests of an SSD storage product is 0.8.…
A: Given that p = 0.8 X ~ Geometric (p = 0.8) p = Probability of a successful SSD read-write during…
Q: The number of sick days taken (per month) by 200 factory workers is summarized below. Number of Days…
A: Answer: Using the given data, Total frequency = 200 By the given frequency distribution,
need help with question b
Step by step
Solved in 2 steps
- A telephone company has the business objective of wanting to estimate the proportion of households that would purchase an additional telephone line if it were made available at a reduced installation cost. Data is collected from a random sample of 500 households. The results indicate that 135 of the households would purchase the additional telephone line at a reduced installation cost. - construct a ninety nine percent confidence interval estimate for the population proportion of households that would purchase the additional telephone line.In exploring possible sites for a convenience store in a large neighbourhood, the retail chain wants to know the proportion of ratepayers in favour of the proposal. If the estimate is required to be within 0.1 of the true proportion, would a random sample of size n = 100 from the council records be sufficient for a 95% confidence interval of this precision?In a situation where the sample size was decreased from 39 to 29 in a normally distributed data set, what would be the impact on the confidence interval?
- 1. A recent survey showed that from a sample of 500 packages delivered by a Postal Service, 480were delivered on time. a) Construct a 95% confidence interval for the proportion of all packages that are deliveredon time by the Postal Service.In an article in the Journal of Advertising, Weinberger and Spotts compare the use of humor in television ads in the United States and the United Kingdom. They found that a substantially greater percentage of U.K. ads use humor.a. Suppose that a random sample of 400 television ads in the United Kingdom reveals that 142 of these ads use humor. Find a point estimate of and a 95 percent confidence interval for the proportion of all U.K. television ads that use humor.b. Suppose a random sample of 500 television ads in the United States reveals that 122 of these ads use humor. Find a point estimate of and a 95 percent confidence interval for the proportion of all U.S. television ads that use humor.c. Do the confidence intervals you computed in parts a and b suggest that a greater percentage of U.K. ads use humor? Explain.A consulting firm wants to study communication deficiencies in the health care industry. A random sample of 75 health care clinicians reveals the following: Time wasted in a day due to outdated communication technologies: X=47 minutes, S=11 minutes. Forty health care clinicians cite inefficiency of pagers as the reason for the wasted time A.)Construct a 95% confidence interval estimate for the population mean time wasted in a day due to outdated communication technologies. ___ <u< ___ B.)Construct a 99% confidence interval estimate for the population mean time wasted in a day due to inefficiency of pagers ___ <u< ___ C.)Construct a 90% confidence interval estimate for the population mean time wasted in a day due to inefficiency of pagers ___ <u< ___
- The National Weight Control Registry tries to mine secrets of success from people who lost at least 30 pounds and kept it off for at least a year. It reports that out of 2,720 registrants, 439 were on a low-carbohydrate diet (less than 90 grams a day). a. Develop a 95% confidence interval for the proportion of people on a low-carbohydrate diet.b. Is it possible that the population percentage is 16%? c. How large a sample is needed to estimate the proportion within 0.55%?A researcher computed a 90% confidence interval for the proportion of students who smoke. If the researcher had instead used a 95% confidence interval, then the computed margin of error would have been smaller. True FalseSuppose an All Greens store in Sonoma, California, wants to estimate a range of advertising costs appropriate to its store. If it spends too little on advertising, it will not reach enough customers. However, it does not want to overspend on advertising for this type and size of store. At this store, x1 = 163, x2 = 2.4, x3 = 188, x5 = 6.6, and x6 = 10. Use these data to predict x4 (advertising costs) and find an 80% confidence interval for your prediction. (Use 2 decimal places.) prediction lower limit upper limit At the 80% confidence level, what range of advertising costs do you think is appropriate for this store? (Round to nearest integer.) lower limit $ upper limit $
- On the basis of the results to part A in the picture, does the manager have a right to complain to the manufacturer?  does a 1 gallon paint can containing exactly 1 gallon of paint lie within the 95% confidence interval? Estimate the minimum sample size needed to achieve the margin of error E=0.013 for a 95% confidence interval.A 90 percent confidence interval is to be created to estimate the proportion of television viewers in a certain areawho favor moving the broadcast of the late weeknight news to an hour earlier than it is currently. Initially, theconfidence interval will be created using a simple random sample of 9,000 viewers in the area. Assuming that thesample proportion does not change, what would be the relationship between the width of the original confidenceinterval and the width of a second 90 percent confidence interval that is created based on a sample of only 1,000viewers in the area?(A) The second confidence interval would be 9 times as wide as the original confidence interval.(B) The second confidence interval would be 3 times as wide as the original confidence interval.(C) The width of the second confidence interval would be equal to the width of the original confidence interval.(D) The second confidence interval would be 1/3 as wide as the original confidence interval.(E) The second…