A random sample of 40 customers has an average order size of $78.25, and a population standard deviation of $22.50. Not all samples of this size would give you the same sample average, so you'd like to construct an "interval estimate" to convey this uncertainty. What is a 90% confidence interval for this mean? Group of answer choices $72.40 - $84.10 $41.24 - $115.26 $77.32 - $79.18 $71.13 - $85.37

Q: The tree ring dating method gave the following years A.D. for an archaeological excavation site.…

A: Given that data  1180 1278 1292 1320 1268 1316 1275 1317 1275 First I want to find mean and…

Q: which of the following sample data: sample size= 100 sample mean= 34oz/hr sample variance= 9oz/…

A: which of the following sample data:   sample size= 100   sample mean= 34oz/hr   sample variance=…

Q: 4. The Department of the Treasury is interested in finding out what proportion of people support…

A: 4)Givensample proportion(p^)=15%=0.15Margin of error(E)=5%=0.05confidence interval = 95%

Q: The data presented in the Table below show the Price and Quantity of selected export commodities for…

A: Given information: As per guidelines we will solve the first question only, please repost other…

Q: Below and copy (CTRL-C should work he Open Geogebra and choose “Spreadsheet." You can also get to…

A: Given: The data given is as follows x y 14 88 15 29 18 22 27 64 38 22 64 14 65 52…

Q: re interested in studying cigarette demand by young adults. Lets consider the following model: ncaj…

A: Given: The regression line is  ncaj = β0 + β1price + β2age + β3income + u ncaj is monthly cigarette…

Q: Births are approximately Uniformly distributed between the 52 weeks of the year. They can be said to…

A: As per bartleby guideline expert have to answer first three subparts only dear student please upload…

Q: You are interested in finding a 99% confidence interval for the average commute that non-residential…

A: Given that  Observation: XX X^2X2 1 19 361 2 27 729 3 16 256 4 23 529 5 12 144 6 26…

Q: toss a die and a coin, if the event A is the occurence of a head and an odd number and the event B…

A:

Q: Questions: On most days, how much weight did she lose? She wants to easily analyze her data, help…

A: Given Information:-   Days Day Final weight Week 1 Monday Day 1 86.7   Tuesday Day 2 86.7…

Q: a teacher wants to explore what type of activities worked best for the class. the class o 40 was…

A: Hi, there! As per the norms, we are allowed to solve three subparts at a time. Kindly repost the…

Q: Passenger kilometres (pax-km) flown on Golden Airlines, a commuter firm serving the Johannesburg –…

A: “Since you have posted a question with multiple sub-parts, we will solve first three subparts for…

Q: In a CBS News survey done in 2006, 88% of n = 348 randomly sampled married men said that they would…

A: Given that  Sample sizes n1=348 , n2=584 Sample proportion p1^=0.88 , p2^=0.84

Q: A statistical test is designed to show that the mean u is different from 100, state the null…

A: Given that  μ = 100

Q: A grocery store manager did a study to look at the relationship between the am customers spend in…

A: The independent variable is Time. The dependent variable is Money. We have to do correlation and…

Q: In a hypothesis test with hypotheses Ho:u = 90 and H1: 90, a random sample of 16 elements selected…

A:

Q: À credit union took a random sample of 40 checking accounts. The sample mean account balance was…

A:

Q: A person aged 30 buys a whole life insurance policy with the following death benefits: SO if death…

A: Given the death benefits of a whole life insurance policy as 1. $0 if death occurs between age 30…

Q: A psycharist hypothesized that patients with schizopherina , who stayed in the hospital the longest…

A:

Q: ne regression output is provided below with corresponding standard errors in parentheses. ids =…

A: Given: Coefficient of y74 = 0.19 Standard error of y74 = 0.1710 Critical value at 10% significance…

Q: CHICKEN FEED ADDITIVE STUDY Instruction: For all test of hypotheses, write Ho and Ha in words,…

A: Given Information: Consider the matrix of HSD's test result for the experiment. Treatments Mean…

Q: Jane is taking two books along on her holiday vacation. With probability 0.5 she will like the first…

A: Let A= she will like 1st bookB=she will like 2nd bookGiven,P(A)=0.5P(B)=0.4P(A∩B)=0.3

Q: O a. Yes, conducting a hypothesis test using the t-distribution would be appropriate. O b. No,…

A: We have given that the data represented in two graphs histogram and box plot.

Q: A study on how the time of exercise affects heart rate had the following output Simple Linear…

A: If I exercise for time=163, what should be my heart rate? After exercising everybody has different…

Q: Three balls are to be randomly selected without replacement from an urn containing 20 balls numbered…

A: There are 20 balls numbered 1 through 20. The number of balls larger than 17 are 3. The number of…

Q: Did Clayton State Students gain weight, on average, during the COVID-19 quarantine? You wonder if…

A: Given that   x̄ = 168.9 , μ = 163.7 , s = 13.8 , n = 43 Note: According to bartleby experts question…

Q: You are conducting a test of independence for the claim that there is an association between the row…

A: Given that    X Y Z A 17 33 36 B 14 46 37

Q: 1. x = 13 2. x = 9 3. х%3D 23 X =

A: Given that  X~Normal(μ= 17  , σ= 4 ) μ= 17 , σ= 4 Formula for Z-score Z=(X-μ)/σ Note: According to…

Q: Consider the following simple regression model y = B0 + B1x1 + u and z is an instrument for x.…

A: Given Information: Consider the simple regression model:      y=β0+β1x1+u       (z is an instrument…

Q: The following table lists the monthly incomes (in hundreds of dollars) and the monthly rents paid…

A: Solution: Let x = Monthly income  and  y= Monthly rent  x y x2 xy 24 7 576 168 16 4.5 256 72…

Q: The National Longitudinal Study of Adolescent Health interviewed several thousand teens (grades 7 to…

A: Hi! Thank you for the question, As per the honor code, we are allowed to answer three sub-parts at a…

Q: The shape of the sampling distribution of the sample mean for the sample size n= 12 will be: O a.…

A: Given that  Sample size n =12  Sample mean =23.2 Standard deviation =2.4

Q: iven that the mean  Sampel mean =35 standard mean =7 sample size =16  (a) the confidence…

A: Given that  Sample mean (x¯) = 35 Standard deviation (σ) = 7 Sample size (n) = 16   We know that…

Q: We are testing whether a particular program of low impact exercise can improve the cholesterol level…

A: Solution: n= 38 Sample size  x = ∑xn=266.938=7.0237 Sample mean s= ∑(x-x)2n-1s =1.6480 Sample…

Q: Find the mean, variance and standard deviation for the grouped frequency distribution below. Class…

A: Given data is  Class Frequency(f) 0 - 9.9 5 10 - 19.9 13 20 - 29.9 23 30 - 39.9 31 40 -…

Q: Describe the null and alternative hypotheses used in hypothesis testing

A: Hypothesis testing is one of the statistical inferential procedures.

Q: term insurance with sum insured $1000 payable at the end of the year of death. Let us suppose that…

A:

Q: A personality study on university students was conducted to investigate the hypothesis that…

A: Given : Group 1 Group 2 Group 3 3 2 3 2 1 1 5 3 4 2 3 4   3 2

Q: A. Compute for the values of the following: 3. P25; Pso; P75; P90 Age f <ef 5-9 10 10 10-14 16 26…

A: Percentiles are the values that divides a frequency distribution into 10 equal parts. That means,…

Q: The results of the total test scores of 60 test participants as new employees of a hardware company…

A: Given information: 120, 120, 125, 130, 140, 145, 145, 150, 160, 160, 165, 170, 172, 175, 175, 180,…

Q: With 90% confidence the proportion of all people who accept the theory that a person's spirit is no…

A:

Q: Determine whether the outcome is a Type I error, a Type II error, or a correct decision. A test is…

A: We will tell you which one is the correct choice

Q: 2. An investment consultation firm claims that it will increase the returns on its clients'…

A: Given that  Sample size n =50 Sample mean =18.5 Standard deviation =0.5

Q: 2. A survey of 20 people asked, "If you've ever been married, how old were you when you were first…

A:

Q: - In the Simple linear regress sumed to be independent True False

A: Hi! Thank you for the question, As per the honour code, we are allowed to answer three sub-parts at…

Q: A fiber spinning process produces a fiber whose strength is normally distributed with average of…

A: Given that  X~Normal(μ= 78.9 , σ2 = 30 ) μ=78.9  , σ=√30=5.48 Minimum acceptable resistance=65.7…

Q: a. Predict the sales resulting from a $15,000 investment in inventory and an advertising budget of…

A: here given regression equation   y^ = 35 + 13x1 + 5 x2 x1 = inventory investment (in 1000 $) x2 =…

Q: In a hypothesis test with the null and alternative hypotheses Ho: u 45, a random sample of 69…

A:

Q: Explain why Control Charts generally do not require Normality Study. Name the one Control Chart that…

A: Please find the explanation below. Thank you.

Q: At your part-time job in the office, your manager requested that you examine all accounts receivable…

A: Given n=sample size=45, Sample standard deviations s=43.72, sample mean x̄=135.4