Forecasting. Using X =20 and P = 5 as reference points, A. Calculate a point forecast of future sales. B. Construct an approximate 95% confidence interval for forecast sales
Q: Draw a normal distribution.
A: We know that the normal distribution, P( μ - σ < X < μ + σ ) = 68% P( μ - 2σ < X < μ + 2...
Q: Expected values and Binomial distribution 10. A cubical die is biased. The numbers one to five are e...
A:
Q: Illustration. 16.75. If A1, A and Az be any three events prove that 3 P(A + A, + Az) =EP(A;) -EP(A;A...
A:
Q: Solve the quation: Tony and his team identified some risks during the first month of the Recreation ...
A:
Q: Below is a graph of a normal distribution with mean u=-4 and standard deviation o= 2. The shaded reg...
A:
Q: Please create an experiment (Dice, cards, or spinners can be used) that must consist of 3 actions. ...
A: We know that the , An experiment is a controlled study in which the researcher attempts to understa...
Q: lottery box contains lottery tickets numbered 0 to 100. If a lottery ticket is drawn at random, find...
A:
Q: Create your own probability problem using a number cube. Classify your event and its compliment. Are...
A: The number cube has 6 sides with numbers 1, 2, 3, 4, 5, 6 on each face. Let A be an event that dice ...
Q: (Round to four decimal places The probability that the member selected at random is from the shaded ...
A:
Q: 4) In Toronto, Canada, 55% of people pass the drivers' road test. Suppose that 100 people take the t...
A: As per guidelines expert have to answer first question three subparts only dear student please uploa...
Q: What is the probability of rolling, on a fair dice a multiple of 3 given that an even number was dra...
A: We have given that The sample space is S = { 1, 2, 3, 4, 5, 6 }.The total number of outcomes = 6 ...
Q: A four-digit number is to be formed from the digits 0, 1, 2, 3, 5, 7, 8, and 9. How many four-digit ...
A: Given digits is 0,1,2,3,5,7,8,9
Q: Expected values and Binomial distribution 2. A packet of vegetable seeds has a germination rate of 9...
A:
Q: In how many ways can a person select seven party guests from 12 women if he is to avoid having a par...
A:
Q: Theorem 2.1.5 If A, A2 ..., A, are n ( z 2) events, then P UA i- 1 E P(A;} – E P(A¡ N A}} + £ P(A¡N ...
A:
Q: In how many ways can a person select seven party guests from 12 women if he is to avoid having a pa...
A: Here we will use the concept of Combination
Q: 30. The chess clubs of two schools consists of, respectively, 8 and 9 players. four members from eac...
A:
Q: In an IT Certification Examination, the mean was 75 and the standard deviation was 5. If Pam z score...
A: Let X be the examination score from normal distribution with mean (μ) = 75, standard deviation (σ) =...
Q: 25. A six-sided die has faces numbered 1, 2, 3, 4, 5 and 6. Suppose the die is "loaded", so that any...
A: Let x be probability of odd face and 2x be probability of even face. That is 3x+3×(2x) =1 9x=1 x=1...
Q: In a chi-squared goodness of fit test, the test statistic value was x = 28.44, and the critical valu...
A: Rejection of hypothesis take place when the statistic falls umder rejection region
Q: It is a striking fact that the first digits of numbers in legitimate records often follow a distribu...
A: Given information: First digit 1 2 3 4 5 6 7 8 9 Proportion 0.301 0.176 0.125 0.097 0.079 0.067...
Q: What is the total number of possible gate codes?
A: here The gate code to a gated community consists of the # key, followed by 2 letters chosen from the...
Q: 2 What fiaction of these palls trave stripes 34
A: Given that Stripes ball=2 Star ball=2 Doted ball=2
Q: You flip a fair coin twice. X is 2 if the first coin is heads and 4 if the first coin is tails. Y is...
A: Given As X and Y are independent variables here Var(X + Y) = Var(X) + Var(Y) as the covariance term...
Q: Exercise III.4. Suppose that for i i is a random variable R; which is uniformly distribution on [0.0...
A: Given that. The interest rate obtained in the month i is a random variable Ri, which is the uni...
Q: Consider the probability that a random interval x + (t.05)S will contain the fixed (population mean)...
A: The given information is- Sample size = n = 10 Sample mean = x̄ = 131 Sample Variance = s2 = 971.11 ...
Q: Discrete Probability Distributions: Suppose that Pain Away, a new drug, is effective for 85% of the ...
A: Given that Number of patients =5 Probability of success of new drug =0.85 We have to find a . wh...
Q: The table displays the number and type of tickets bought for a play that was performed in both the a...
A: Let A represents 'a child tickets is bought for a play' and B represents 'the play is performed in t...
Q: Grand Sun Buffet is a large restaurant chain. After paying for a meal at Grand Sun Buffet, customers...
A:
Q: A recent poll indicated that 42.9% of voters approve of Mr. Biden's job performance. Suppose 100 peo...
A:
Q: In a five card poker hand, what is the probability of being dealt exactly one seven and no picture c...
A: Here given five card poker hand dealt from standard deck of 52 cards Here total picture cards = 12 ...
Q: llustration 16.49. There are two series with 5,000 lottery tickets in each. There is only one prize ...
A:
Q: What is the probability that a data value in a normal distribution is between a Z-score of -1.42 and...
A: Let Z be the random variable from normal distribution then we will find the probability between z = ...
Q: A statistically minded fraternity junior keeps records on how many girls he has to ask before one ag...
A: Introduction: Denote Xi as the number of girls the fraternity junior has to ask before one agrees to...
Q: 1. Apply the addition rule, P(mean or median) = P(mean) + P(median) - P(mean and median), to find th...
A: We have given that P( mean or median ) = 30% = 0.30 P( median ) = 16% = 0.16 P( mean ) = 27% = 0.27
Q: A coin is weighted in such a way that it lands "heads side up" 70% of the time. The coin is to be fl...
A: Given that p =0.7 ,n=8,k=5 Using negative binomial distribution Find the probability given
Q: In a certain raffle, you are asked to choose six numbers from 1 to 55. You win the jackpot prize if ...
A:
Q: п n 9. Using the Binomial Theorem, show that Σ = n 2"-1. k k=0
A: We need to show that- ∑k=0nknk = n2n-1
Q: An experiment consists of rolling a die until a 3 appears. List the elements of an event E, that eve...
A: Let A denotes any other number on die. Then 3 can appear on the first roll then first element is 3...
Q: The Venn diagram here shows the cardinality of each set. Use this to find the cardinality of th set....
A:
Q: Question 3 Assuming that births in PGH occur randomly at an average rate of 0.8 births per hour. Wha...
A:
Q: (1) The geographical distribution of the hometown of 80 students of PUP is given as: 50 from Luzon, ...
A: (1) The geographical distribution of the hometown of 80 students of PUP is given as: 50 from Luzon, ...
Q: 13 14 15 16 17 18 P(x) 0.08 0.23 0.23 0.28 0.15 0.03
A: Given data is x 13 14 15 16 17 18 P(x) 0.08 0.23 0.23 0.28 0.15 0.03
Q: Suppose that we have a fuse box containing 20 fuses, of which five are defective. If 3 fuses are sel...
A: Given that Total fuse=20 Defective fuse=5 3 fuse chosen at random
Q: Transition Probability 0,9 J 0.9 0.125 0.1 0.075 AA 0.05 BBB ПАА ССС 0.025 D BB 30 40 50 60 70 Price...
A: This shows a transition matrix for different range of price, for a price ranging from 30 to 60 is ab...
Q: The two-way table shows the number of eggs laid by 10 Rhode Island red chickens and 10 leghorn chick...
A:
Q: 8. Theorem 1.7.4 x -le* dx is convergent if and only if n > 0.
A:
Q: I will give good rating please help create an experiment using dice that consists of 2 actions. E...
A:
Q: A drum contains 4 black balls, 5 red balls and 6 green balls. If 5 balls are selected at random, fin...
A:
Y1 Sales | Xi Adv | Y Price |
3 | 1 | 8 |
4 | 2 | 7.5 |
6 | 3 | 7.25 |
5 | 4 | 7.25 |
7 | 5 | 6 |
6 | 6 | 6.75 |
5 | 7 | 6 |
9 | 8 | 5 |
10 | 9 | 4.4 |
9 | 10 | 5.2 |
Forecasting. Using X =20 and P = 5 as reference points,
A. Calculate a point forecast of future sales.
B. Construct an approximate 95% confidence interval for forecast sales
C. Identify two factors that would affect your confidence in your forecast interval
Step by step
Solved in 2 steps with 3 images
- With the growth of internet service providers, a researcher decides to examine whether there is a correlation between cost of internet service per month (rounded to the nearest peso) and degree of customer satisfaction (on a scale of 10 - 100 with a 10 being not at all satisfied and a 100 being extremely satisfied). The researcher only includes programs with comparable types of services. A sample of the data is provided below. f. At 95% Confidence Level, construct a Confidence and Prediction Interval for your answer in (d). Blank 7 < y < Blank 8 Blank 9 < y(n+1) < Blank 10Calcium is essential to tree growth because it promotes the formation of wood and maintains cell walls. In 1990, the concentration of calcium in precipitation in a certain area was 0.12 milligrams per liter (mg/L). A random sample of 10 precipitation dates in 2007 results in the following data table. 0.0720.0710.0890.2410.1130.1790.1150.2120.3340.111 Construct a 90% confidence interval about the sample mean concentration of calcium precipitation. What is the lower bound? The upper bound?Calcium is essential to tree growth because it promotes the formation of wood and maintains cell walls. In 1990, the concentration of calcium in precipitation in a certain area was0.110.11 milligrams per liter (mg/L). A random sample of 10 precipitation dates in 2007 results in the following data table. (b) Construct a 98% confidence interval about the sample mean concentration of calcium precipitation. (c) below. data table 0.074 0.079 0.073 0.272 0.127 0.189 0.117 0.223 0.305 0.115
- Custom-Home Resales. Use the technology of your choice to obtain the requested point estimate and confidence interval for the mean selling price, and the predicted value and prediction interval for the selling price of a home in the Equestrian Estates that has 3200 sq ft, 4 bedrooms, 3 bathrooms, and that remains on the market for 60 days.Tourism is extremely important to the economy of Florida. Hotel occupancy is an often-reported measure of visitor volume and visitor activity (Orlando Sentinel). Hotel occupancy data for February in two consecutive years are as follows. Current Year Previous Year OccupiedRooms 1,470 1,458 TotalRooms 1,750 1,800 current 0.84 previous 0.81 test statistic 2.35 p-value 0.0087 (d) What is the 95% confidence interval estimate of the change in occupancy for the one-year period? (Round your answers to four decimal places.) to Do you think area officials would be pleased with the results? The 95% confidence interval ---Select--- is completely above or contains or is completely below zero. This suggests that the occupancy rates for the current year are ---Select--- higher or lower than the occupancy rates for the previous year, therefore the officials would ---Select--- not be or be pleased with the results.Calcium is essential to tree growth because it promotes the formation of wood and maintains cell walls. In 1990, the concentration of calcium in precipitation in a certain area was 0.12 milligrams per (mg/L). A random sample of 10 precipitation dates in 2007 results in the following data table. 0.074 0.084 0.081 0.278 0.119 0.183 0.124 0.243 0.314 0.107 Construct a 95% confidence interval about the sample mean concentration of calcium precipitation. The lower bound is _____ The upper bound is _____( round to four decimal places as needed)
- 0.56 ppm is the maximum authorized concentration of phosphate in drinking water. Given below is the analysis of various samples of bottled water from the same batch of production. a. Is there an outlier present in the data set at 95% confidence interval? b. What is the t-tab and t-calc for the data set? c. Can the water be used for drinking? Sample Phosphate (ppm) 1 0.26 2 0.46 3 0.41 4 0.49 5 0.43 6 0.38The drug Viagra became available in the U.S. in May 1988, in the wake of an advertising campaign that was unprecedented in scope and intensity. A Gallup poll found that by the end of the first week of May, 643 out of 1,005 adults were aware that Viagra was an impotency medication. a) Is the sample size large enough to compute a confidence interval for the proportion of adults who were aware that Viagra was an impotency medication after the first week of May? Yes, because more than 10 adults were not aware of Viagra Yes, because the sample size is greater than 30 Yes, because more than 10 adults were aware of Viagra Yes, because both np̂ and n(1-p̂) are greater than 10 b)Using the information from questions 1-3, suppose that p̂ is 0.40 and the standard error of p̂ is 0.10. Compute a 90% confidence interval for the proportion of adults that were aware of Viagra. (0.2355, 0.5645) (0.3, 0.5) (0.2355, 0.4) (0.3, 0.4)(f) Suppose you and your business associates rent a store, get a bank loan to start up your business, and do a little research on the size of your sales district and the number of competing stores in the district. If x2 = 2.8, x3 = 250, x4 = 3.1, x5 = 7.3, and x6 = 2, use a computer to forecast x1 = annual net sales and find an 80% confidence interval for your forecast (if your software produces prediction intervals). (Use 2 decimal places.) forecast lower limit upper limit (g) Construct a new regression model with x4 as the response variable and x1, x2, x3, x5, and x6 as explanatory variables. (Use 2 decimal places for the intercept, 4 for x1, 5 for x3, and 3 otherwise.) x4 = + x1 + x2 + x3 + x5 + x6 Suppose 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…
- The sample observation below were randomly selected. (a) Determine the regression equation, (b) Determine the expected value of Y if X=9, (c) Determine the 0.90 confidence interval for the mean predicted when X=9, and (d) Determine the 0.90 prediction interval for an individual predicted when X=9. x 4,5,3,6,10 y 4 6 5 7 7The data below gives the mean price (in cents) of a litre of regular gasoline at self-service filling stations at a sample of six urban centres in Canada in May 2012. Part (c) Using the appropriate t distribution, find a 90% confidence interval for the mean gasoline price per litre across urban Canada in May 2012. Provide the upper and lower bounds for your confidence interval. ( , )Part (d) Would a 95% confidence interval be wider or narrower than the interval you found in Part (c)? Using the appropriate t distribution, find a 95% confidence interval for the mean gasoline price per litre across urban Canada in May 2012. Provide the upper and lower bounds for your confidence interval. ( , )A farmer wants to test the effectiveness of a pest control method in allowing strawberry blooms to yield marketable strawberries. Of a random sample of 100 blooms,77 yield marketable strawberries. Is this evidence that two thirds or more of all blooms grown with this pest control method end up as marketable strawberries? The 95%large-sample confidence interval for the proportion of blooms that yield marketable strawberries is: A. 0.77± 0.042 B. 0.77±0.082 C. 0.77±0.0034 D. 0.77±0.0017G5