A local company wants to evaluate their quality of service by surveying their customers. Their budge limits the number of surveys to 250. What is their maximum error of the estimated mean quality for a 95% level of confidence and an estimated standard deviation of 13? Multiple Choice O 1.5904 1.61 3.22

Q: Find null hypothesis and alternative hypothesis. Find test statsistic. Find P-value.  How do you…

A:

Q: 7.25 Fuel economy. Although the Environmental Protection Agency (EPA) establishes the tests to…

A: Given: n = 16 Confidence level = 95% Formula Used: Confidence Interval = X ± t*sn

Q: ..If X is a Normal variate with mean30 and D 5.Find P [26<X<40].

A: Given that mean =30 standard deviation=5

Q: In a experiment on relaxation techniques, subject's brain signals were measured before and after the…

A:

Q: If X has Exponential Distribution with parameter 1,find the p.d.f of Y = √√x.

A: Given  X~exp(1)

Q: The following stem-and leaf display shows the weight, in kilogram, boxes of juice Stem-and-Leaf…

A:

Q: The accompanying data are​ drive-through service times​ (seconds) recorded at a fast food restaurant…

A: Given that: Service Times (in minutes) 295 150 140 165 161 267 281 169 142…

Q: b) Create a 95% confidence interval for the average number of chips in bags of Chips Ahoy! cookies.…

A: From given data we have : 1132,1345,1087,1244,1419,1191,1135,1270,1295,1214,1121,1258,1325,1356 mean…

Q: It is believed that a stock price for a particular company will grow at a rate of $5 per week. An…

A: given data, normal distrubution , n=10 weeks we have to find out the p-value and complete the…

Q: What size sample is needed to get a margin of error within ±2% with 95% confidence.

A: Given: Margin of error E = 2% = 0.02 Confidence level = 95% Formula Used: n = Z2p^(1-p^)E2

Q: Say you get a z-score of z=0.35. Find 2* P(Z >|z)

A: Given that the z-score is 0.35. Which is positive.

Q: A college professor claims that the entering class this year appears to be smarter than entering…

A: Note: Hey, since multiple subparts are posted, we will answer first three subparts according to our…

Q: Sal knows that parties of people on average spend 75 minutes at their restaurant. They wonder if…

A: Givensample size(n)=30Mean(x)=82standard deviation(s)=17significance level(α)=0.05

Q: James is trying to use proportion of men wh and found that 713 of confidence interval.

A: Given information: There are 800 men and found that 713 of them bought flowers. Let, n=800 and x=713…

Q: The sourse table depicts the results of a fictional study investigating whether the number of hours…

A: Answer: From the given data, Significance level (α) = 0.05 Using the given ANOVA output table, For…

Q: Solid fats are more likely to raise blood cholesterol levels than liquid fats. Suppose a…

A: Given: n1 = 6 n2 = 6 Formula Used: Test-statistic t = X1-X2sp1n1+1n2 sp = (n1-1)s12+(n2-1)s22n1+n2-2

Q: A Department of Motor Vehicles office claims that the mean wait time is less than 17 minutes. A…

A: GivenMean(x)=14standard deviation(s)=3.2sample size(n)=28significance level(α)=0.12

Q: 2. Examine the tables below and answer the questions that follow. Table A Year 0 1 2 3 4 5 6 Amount…

A: Since there are multiple sub-parts, as per the honor code the first three sub-parts will be solved.…

Q: A sales analyst wants to determine whether there is a difference in the mean monthly sales of a…

A: We we’ve to test the difference in means for 4 groups. ANOVA test is used for testing 3 or more…

Q: . State the Properties of expectation. If X and Y are random variables and a,b are constants, then…

A:

Q: Which of the following is NOT true when testing a claim about a standard deviation or variance? OA.…

A: Given:: NOT true when testing a claim about a standard deviation or variance.

Q: Cornea Diabetes 3a 3b Hypertension 4a 4b 5 6 Control Endothelial cell density (cells/ Age…

A: Solution: From the given information,

Q: How can we decide if a sample is typical or extreme? By comparing the population mean with the…

A: By the assumption of the central limit theorem, for sufficiently large sample size, the sampling…

Q: 7.18 One-sided versus two-sided P-values. Computer software reports x = 11.2 and P = 0.075 for at…

A: Given P=0.075

Q: The least-squares regression equation is y=745.9x + 12,727 where y is the median income and x is the…

A: The given regression equation is y^=745.9x+12727.

Q: The following problem deals with evaluating a particular expression from Topic 17 a. Say you get a…

A: Given that, z= -1.21  then |z|= |-1.21|  = 1.21

Q: Suppose an SAT preparation course makes the following statement in their advertising brochure: “We…

A: Given that, An SAT preparation course makes a statement in their advertising brochure. The statement…

Q: Elephants are the mammals with the longest gestation period. One species of elephant has a mean…

A: Given that,  Population mean, u= 635 population standard deviation is 63  sample size is n= 42 and…

Q: The table below lists the height h (in cm), the age a (in years), the gender g (1="Male",…

A:

Q: The weight of 45 watermelons from a farm is shown below.   Weight  Frequency 11-15 4 16-20 8 21-25…

A: Given data is Weight Frequency 11 - 15 4 16 - 20 8 21 - 25 13 26 - 30 11 31 - 35 9

Q: 10. The appropriate p-value to know whether the mean weight loss differs among the three diets is A.…

A: The question is about ANOVA Introduction : ANOVA is a parametric test which is used to check whether…

Q: The average height of students at a university from an SRS of 14 students gave a standard deviation…

A: Given Sample size=14 Standard deviation=2.5

Q: A continuous RV X that can assume any value between x = 2 and x = 5 has a density function given by…

A:

Q: QUESTION 28 A car insurance company wanted information about the age of its customers. A researcher…

A: Given that car insurance company wanted information about the age of its customers. A researcher…

Q: Please show steps in Excel. The 32 teams in the National Football League (NFL) are worth, on…

A: Given: n = 32 Explanation: a).  Scatter diagram: Enter the data in MS Excel Select the data and go…

Q: le 1 showed data on accidents involving trains. Is it plausible that the collision counts are…

A: The given data shows accidents involving trains.Part (1) The objective is to test that the collision…

Q: del Normal P-P Plot of Regression Standardized Residual Dependent Variable CallensPer100Mes Expected…

A: From the above graph we see that, the data fits well in the regression model. There are 3 variables.…

Q: Given an actual demand this period of 100, a forecast value for this period of 146, and an alpha of…

A: The given actual demand is 100 and forecast value is 146 and alpha is 0.88.

Q: Find the p-value for a two-tailed hypothesis test with a test statistic of z= 2.49

A: given data  two tailed test z  = 2.49 p value = ?

Q: Five pulse rates are randomly selected from a set of measurements. The five pulse rates have a mean…

A: Given         pulse rates are 74, 70, 51 and 93          mean of 5 pulse rate, x¯=68.6…

Q: Is there any significant difference in the mean weights after treatment?

A: Please find the explanation below. Thank you.

Q: In the first hour of customers using the app they served 180 customers. STACO decided to treat this…

A: In the first hour of customers using the app they served 180 customers. STACO decided to treat this…

Q: Food Availability 7. Circle the correct answer. Would you expect the p value to be: p> 0.05 p<0.05…

A: An error bar graph depicts how the food availability compares to the number of offspring.  To check…

Q: Variable Intercept X Z XZ Y Sum 18.00000 263.80000 9.00000 126.80000 2597.50000 Source Model Error…

A: Solution: The output for the regression is given.

Q: Find the critical value(s). Round the answer to at least three decimal places. If there is more than…

A: Given: n = 6 α = 0.10 Formula Used: Test-statistic t = d-μdsdn

Q: If X is a Poisson variate such that P(X = 1 3/10 and P(X = 2) = 1/5 Find P(X= 0) and P(X = 3).

A: Given that X is a Poisson variate. PX=x=e-λλxx!, x=0,1,2,... Given that P(X=1)=3/10.…

Q: A random sample of 855 births included 429 boys. Use a 0.01 significance level to test the claim…

A: It is given that a random sample of 855 births included 429 boys.

Q: 7.22 A final one-sample t test. The one for testing Ho: μ = 20 Ha: μ < 20 based on n = 9…

A: The sample size n is 9 and the t value is -1.85.

Q: Suppose that E and F are two events and that N(E and F)=420 and N(E)=740. What is P(F|E)?

A:

Q: verify the details of the vendor invoice with a purchase order and a receiving report before…

A: Option D is the answer. Answer : Block Sampling.