The following data was collected by a particular company to determine if a relationship between the number of people in a household and weekly food expenditures exists. Regression analysis is done using this data, and the following Excel see attached image Household Number in Household Weekly Food Expenses 1 2 $95 2 3 $137 3 5 $165 4 2 $105 5 4 $227 6 4 $240 7 5 $185 a. Interpret the correlation coefficient and the coefficient of determination.
Q: What is the class mark of a class interval 30-34? (A 32.5 (в 30.5 C) 32 D 34.5
A:
Q: 2 Suppose that player A plays the mixed strategy 3' and player B plays the mixed 9' (G) strategy Fin...
A: Given that player A plays the mixed strategy 23,29,19.
Q: Random assignment guarantees that participant characteristics do not become a confounding variable. ...
A: Confounding variables are those that affect other variables in a way that produces distorted associa...
Q: In a population that is normally distributed with a mean X and standard deviation Y, determine the a...
A: Empirical rules :1) P(μ-σ<X<μ+σ)=68%2) P(μ-2σ<X<μ+2σ)=95%3) P(μ-3σ<X<μ+3σ)=99.7%
Q: A survey of randomly selected university students found that 92 of the 107 first-year students and 9...
A: (a) Obtain the 99% confidence interval for the difference in the proportions of first-year and sec...
Q: EXАMPLE 3. P(X) Find u and o. 2 0.042 0.010 4 0.021 0.375 0.188 7 0.344 8 0.021
A:
Q: A textile mill company is investigating a new drapery yarn, which the company claims have a mean thr...
A: From the given information, H0:μ=12 VS H1:μ≠12 σ=0.5n=4 Acceptance region is 11.4≤x¯≤12.6: Rejection...
Q: Prediction intervals are not sensitive to th normality assumption because Xn+1 is a future observati...
A: The prediction interval measures the predicted valued of dependent variable such that 95% of times c...
Q: Suppose IQ scores are approximately normally distributed with a mean of 100 and a standard deviation...
A: Given that, IQ scores are approximately normally distributed with a mean of 100 and a standard devia...
Q: Which of the following is a continuous quantitative variable? A Number of patients in a ward B Books...
A:
Q: Test the claim that the proportion of men who own cats is significantly different than the proportio...
A: here , Test the claim that the proportion of men who own cats is significantly different than the pr...
Q: Can we show at the 5% significance level that their average is below 19.45?
A: It is given that Sample size n = 44 Sample mean = 19.03 Population SD = 3.68 Level of significance =...
Q: 1. A box contains gold coins and silver coins. If four coins are selected at random, construct a pro...
A: For the given data Draw tree diagram Probability distribution table
Q: A large cube is painted red from all its sides, and then cut into 27 smaller cubes (like a rubiks cu...
A:
Q: A CNC (computer numerical control) machine produces iron automobile crankshafts. Samples are measure...
A: For the given data Find 99% C.I =? 99% P.I =? 99% T.I =?
Q: The amount that households pay service providers for access to the Internet varies quite a bit, but ...
A: Explanation:a sample survey asks an SRS is 500 households Find the sampling distribution of x In st...
Q: You wish to test the following claim (HaHa) at a significance level of α=0.01α=0.01. For the context...
A:
Q: Table 2 Population of The British Virgin Islands by broad age groups, 2010 Population Age Group 2,13...
A: Age group 15-24 is considered as youth. Here youth population is 1767+1720=3487, out of total popula...
Q: A bag contains 5 white and 8 red balls. Two drawings of 3 balls are made such that (a)" the balls ar...
A: Here given box contains 5 white and 8 red balls Here use basic probability = #Favorable outcomes/#t...
Q: A U.S. firm holds an asset in Great Britain and faces the following scenario: State 1 State 2 50% St...
A: From the given information, State 1 State 2 State 3 Probability 25%=0.25 50%=0.50 25%=0.25 ...
Q: Find the mean from the following data : 10 15 20 25 30 35 40 f 5 9 13 21 20 15 8 3
A:
Q: A fine dining restaurant claims that the group sizes of their customers follows the following distri...
A: Given that A fine dining restaurant claims that the group sizes of their customers follows the foll...
Q: The 3 techniques for creating equivalent groups all have their own pros and cons. While all of them ...
A: External validity of an experiment - It belongs to the outcome of study and application of outcome t...
Q: To date, you have learned about statistical significance (rejecting the null hypothesis) and the fou...
A: Meaning of statistically significant: In statistical analysis, the word “significance” essentially m...
Q: The proprietor of a greenhouse claims that its pots of lilies average 6.0 buds, with s = 0.4 buds. I...
A: Given that Hypothesized Population Mean (\mu)(μ) = 66 Sample Standard Deviation (s)(s) = 0.40....
Q: 30 4. For the following data set, find the mean, median, and mode and select the appropriate ca Data...
A: 4)We have given that. First Arrange data in ascending order. 1, 2, 2, 3, 3, 3, 4, 4, 5 NOTE:- Acco...
Q: The compliment of guessing 3 correct answers on a 4-multiple-choice quiz is?
A: From the given data, we have to say that The compliment of guessing 3 correct answers on a 4-multipl...
Q: The normal curve has two inflection points. Approximately 50% of the data in a normal distribution h...
A: Please find the explanation below. Thank you
Q: Given the data, create a stem and leaf plot. Using the stem and leaf plot solve for the mean and med...
A: Given that The data are X=12,13,21,27,33,34,35,37,40,40,41,56
Q: (a) At a meeting of 15 marketing personnel, what is the probability that 10 or more are extroverts? ...
A: Here use binomial distribution in each case Finite number of trial There are two outcomes success ...
Q: Each member of a random sample of 19 business economists was asked deviation 1.8%. predict the rate ...
A:
Q: Calculate the value of mode from the following data: Marks : 10 15 20 25 30 35 40 Frequency 8 12 36 ...
A: The frequency of observation is maximum is called mode
Q: In Ukraine-Russian war, there is a 50% chance that any missile will strike the target. Three direct ...
A: Here GIVEN Probability of Missile strike the target=p=0.5 n=Total no of missile fired
Q: Example 25. The quarterly profits (in lakhs of Rs.) of three companies are Calculate their standard ...
A:
Q: What will be the probability that the second call to be answered on one particular day is his sixth...
A: Here Given Probability of Mr Adams call will be answered =13=p Now Here we can assume Each call is ...
Q: Average marks in Statistics of 10 students of a class was 68. A new student took admission with 72 m...
A:
Q: Aldrich Ames is a convicted traitor who leaked American secrets to a foreign power. Yet Ames took ro...
A: Given Information: 85% of those trained were able to pass the polygraph examination even when guilty...
Q: The average speed of vehicles on highway is being investigated. Suppose observations on 30 vehicles ...
A: We have given that, Sample mean (x̄) = 62 , standard deviation (s)=6 and sample size (n) = 30 Then,...
Q: Fill in the blank with an appropriate word, phrase, or symbol(s). If a candidate wins a first electi...
A: Probabilistic voting theory is the mathematical theory of candidate behaviour in election.
Q: process mean has shifted to 5.2 with a Sigma (standard deviation) of 1.0 minute. compute for Cp and...
A:
Q: B increases as µ approaches µowhen Ho is false True False
A:
Q: R COMMANDER OUTPUT R COMMANDER OUTPUT meat = chicken 32 o 38 o Shapiro-Wilk normality test data: tri...
A: Shapiro will test used for examining the normality of data hypothesis for shapiro wilk test H0: the ...
Q: Prove that the sum of the probabilities of all possibilities in two independent events amount to cer...
A:
Q: a) Suppose that Game store in Cape Town donated a lot of 8 computer sets that includes 3 which are ...
A: Given that Total computer=8 Defective computer=3 4 computer are chosen at random
Q: The amount of money spent on online foods by customers at an online restaurant follows a normal dist...
A:
Q: tested POSITIVE COUID Infected (101) (2) tested NEGATIVE COVID Not 9nfected tested POSITIVE ) 305 te...
A: There are total 101 COVID infected from which 91 tested positive and 2 tested negative. There are 30...
Q: The following are the marks obtained by a batch of 9 students in a certain test : SL. No. Marks S1. ...
A:
Q: The fuel economy of a 2011 Lexus RX 350 2WD 6 cylinder 3.5 L automatic 5-speed using premium fuel is...
A: Solution-: Given: μ=20.5MPG,σ=1.25MPG (a) What is the standard error of x, the mean from a ran...
Q: Which of these best represents the sample space associated with selecting two coins at random with r...
A: It is given that Bag contains 2 dimes, 1 nickel and 1 penny i.e d, d, n, p. Sample size n = 2
Q: Test the claim that the mean GPA of night students is significantly different than the mean GPA of d...
A: Given Data : For Sample 1 x̄1 = 2.77 s1 = 0.03 n1 = 40 For Sample 2 x̄2 = 2....
The following data was collected by a particular company to determine if a relationship between the number of people in a household and weekly food expenditures exists.
Household |
Number in Household |
Weekly Food Expenses |
1 |
2 |
$95 |
2 |
3 |
$137 |
3 |
5 |
$165 |
4 |
2 |
$105 |
5 |
4 |
$227 |
6 |
4 |
$240 |
7 |
5 |
$185 |
a. Interpret the
Trending now
This is a popular solution!
Step by step
Solved in 2 steps with 1 images
- Lyme disease is an inflammatory disease that results in a skin rash and flulike symptoms. It is transmitted through the bite of an infected deer tick. The following data represent the number of reported cases of Lyme disease and the number of drowning deaths for a rural county. Cases_of_Lyme_Disease Drowning_Deaths Month3 0 J2 1 F2 2 M4 1 A5 3 M15 9 J22 17 J13 5 A6 3…Prenatal care Results of a 1996 American MedicalAssociation report about the infant mortality rate fortwins carried for the full term of a normal pregnancy areshown on the next page, broken down by the level ofprenatal care the mother had received.a) Is the overall rate the average of the other three rates?Should it be? Explain.b) Do these results indicate that adequate prenatal careis important for pregnant women? Explain.c) Do these results suggest that a woman pregnant withtwins should be wary of seeking too much medicalcare? Explain.An engineer wants to know if producing metal bars using a new experimental treatment rather than the conventional treatment makes a difference in the tensile strength of the bars (the ability to resist tearing when pulled lengthwise). At α=0.10, answer parts (a) through (e). Assume the population variances are equal and the samples are random. If convenient, use technology to solve the problem. Treatment Tensile strengths (newtons per square millimeter) Experimental 449 354 450 360 433 388 400 Conventional 370 376 374 424 378 450 438 404 352 376 (a) Identify the claim and state H0 and Ha. The claim is "The new treatment ▼ makes a difference does not make a difference in the tensile strength of the bars." What are H0 and Ha? The null hypothesis, H0, is ▼ mu 1 equals mu 2μ1=μ2 mu 1 less than or equals mu 2μ1≤μ2 mu 1 greater than or equals mu 2μ1≥μ2 . The alternative hypothesis, Ha,…
- An engineer wants to know if producing metal bars using a new experimental treatment rather than the conventional treatment makes a difference in the tensile strength of the bars (the ability to resist tearing when pulled lengthwise). At α=0.02, answer parts (a) through (e). Assume the population variances are equal and the samples are random. If convenient, use technology to solve the problem. Treatment Tensile strengths (newtons per square millimeter) Experimental 400 413 434 409 420 377 392 Conventional 381 446 436 350 404 354 375 361 355 386 (a) Identify the claim and state H0 and Ha. The claim is "The new treatment ▼ makes a difference does not make a difference in the tensile strength of the bars." What are H0 and Ha? The null hypothesis, H0, is ▼ mu 1 equals mu 2μ1=μ2 mu 1 less than or equals mu 2μ1≤μ2 mu 1 greater than or equals mu 2μ1≥μ2 . The alternative…Reject or Fail to Reject the null hypothesis. There is or is not sufficient evidence to support the claim that those treated with magnets have a greater mean reduction in pain than those given a sham treatment.GreenLawns provides a lawn fertilizing and weed control service. The company is adding a special aeration treatment as a low-cost extra service option, which it hopes will help attract new customers. Management is planning to promote this new service in two media: radio and direct-mail advertising. A media budget of $4,000 is available for this promotional campaign. Based on past experience in promoting its other services, GreenLawns has obtained the following estimate of the relationship between sales and the amount spent on promotion in these two media: S = -2R2 − 12M2 − 9RM + 20R + 39M, Where S = total sales in thousands of dollars R = thousands of dollars spent on radio advertising M = thousands of dollars spent on direct-mail advertising GreenLawns would like to develop a promotional strategy that will lead to maximum sales subject to the restriction provided by the media budget. (a) What is the value of sales if $3,000 is spent on radio advertising and $1,000 is…
- A pharmaceutical company fills a drug which is in a powder form into a bottle. It has an automatedprocess consisting of a filling machine and a sealing unit. After filling the bottle, it is automaticallysealed with a metallic cap. To monitor the quality of the process, samples of size 5 are drawnperiodically from the process and the quantity filled is measured. The table below has data on 12such observations.Sample 1 2 3 4 51 9.21 8.87 8.71 9.08 9.342 9.06 8.97 9.13 8.46 8.853 9.35 8.95 9.20 9.03 8.444 9.21 8.71 9.05 9.35 8.875 9.01 9.17 9.21 9.05 9.536 8.74 8.35 8.50 9.06 8.897 9.21 9.05 9.00 8.78 9.238 9.15 9.20 9.23 9.15 9.069 8.98 8.81 8.90 9.13 9.0510 9.03 9.10 9.26 9.44 8.4811 9.49 9.05 9.12 8.88 8.9312 8.95 9.10 9.02 9.04 8.96(a) Establish the upper and lower control limits for the X bar chart and the R Chart(b) Construct a control chart and investigate if the process is in controlValues for setting the control charts are A2 = 0.577, D3 = 0, D4 = 2.114Data: Rate difference per 1000 PY: ___-2.17__; 95% CI __-4.30___ to _-0.03____ HR: __79___; 95% CI _0.63____ to _0.99____ Which statement is the most correct interpretation of the risk of pooled stroke or systemic emboli in the propensity-matched analysis? Apixaban resulted in a statistically significant decrease in stroke or systemic emboli compared to rivaroxaban Apixaban resulted in a statistically significant increase in stroke or systemic emboli compared to rivaroxaban There was no statistically significant difference in stroke or systemic emboli between apixaban and rivaroxaban.Palisades Eco-Park is a small ecological reserve that admits a relatively small number of visitors on any day, but provides both educational and entertaining lectures, exhibitions, and opportunities to observe nature. The company has collected the following data on labor costs and number of visitors to the park over the last 30 months. Month Labor Cost Visitors 1 $ 25,520 1,400 2 $ 35,869 2,135 3 $ 39,504 2,315 4 $ 31,280 1,830 5 $ 34,405 1,954 6 $ 32,293 1,796 7 $ 31,651 1,816 8 $ 37,889 2,204 9 $ 38,120 2,273 10 $ 46,387 2,941 11 $ 41,667 2,451 12 $ 38,576 2,309 13 $ 34,044 1,989 14 $ 32,788 1,924 15 $ 36,542 2,065 16 $ 26,192 1,729 17 $ 30,307 2,797 18 $ 29,613 2,294 19 $ 27,270 1,986 20 $ 29,654 2,448 21 $ 25,394 1,647 22 $ 24,369 1,478 23 $ 28,556 2,690 24 $ 29,803 3,144 25 $ 27,792 2,135 26 $ 31,322 2,696 27 $ 28,318 2,462 28 $ 29,579 2,512 29 $ 28,108 2,068 30 $ 27,550 1,709 Required: a. Estimate the labor…
- Joan’s Nursery specializes in custom-designed landscaping for residential areas. The estimated labour cost associated with a particular landscaping proposal is based on the number of planting of trees, shrubs, and so on to be used for the project. For cost-estimating purposes, managers use two hours of labour time for the planting of a medium-sized tree. Actual times from a sample of 10 planting during the past month follow (times in hours). 1.7 1.5 2.6 2.2 2.4 2.3 2.6 3.0 1.4 2.3 Test to see whether the mean tree-planting time differs from two hours. Hyp: Dec Rule: Calculations: Conclusions:Chest Deceleration Measurements (g) from a Standard Crash Test Small 44 39 37 54 39 44 42 Midsize 36 53 43 42 52 49 41 Large 32 45 41 38 37 38 33 SPSS Results Sum of Squares df Mean Square F Sig. Between Groups 200.857 2 100.429 3.288 0.061 Within Groups 549.714 18 30.540 Total 750.571 20An engineer wants to know if producing metal bars using a new experimental treatment rather than the conventional treatment makes a difference in the tensile strength of the bars (the ability to resist tearing when pulled lengthwise). At α=0.05, answer parts (a) through (e). Assume the population variances are equal and the samples are random. If convenient, use technology to solve the problem. Treatment Tensile strengths (newtons per square millimeter) Experimental 443 376 431 439 398 368 360 Conventional 392 392 400 425 372 370 439 366 392 381 (a) Identify the claim and state H0 and Ha. The claim is "The new treatment makes a difference makes a difference does not make a difference in the tensile strength of the bars." What are H0 and Ha? The null hypothesis, H0, is mu 1 equals mu 2μ1=μ2 mu 1 equals mu 2μ1=μ2 mu 1 less than or equals mu 2μ1≤μ2 mu 1 greater than or equals mu 2μ1≥μ2 . The…