Q2: zahra wants to estimate the mean waiting time at a bank in Abu Dhabi. a random sample of 15 customers yielded a mean of 5.2 minutes and a SD of 1.3 minutes. which distribution should be used to construct the confidence interval? Question 2: Choose the correct answer a-t-distribution with 15 degrees of freedom. b- Standard normal distribution. c- t-distribution with 14 degrees of freedom d- Neither t nor standard normal distribution.

Q: Evaluate the expression C(19, 3), equivalently 19C3. Your answer is:

A: From the provided information, The expression is as follow: 19C3

Q: 18. Chirps and temperature Refer to Exercise 10. The equation of the regression line for predicting…

A:

Q: Write down the five scores in sample1 and the five scores in sample2. Attach the R code for…

A: To select two samples from Normal distribution having mean = 5 and sd = 1. Sample size (n1 = n2) = 5…

Q: 14.5 7.1 61.4 21.0 49.7 25.3 65.8 26.9 44.3 Send data to calculator Send data to Excel 3.1 3.6 10.0…

A: Given information: y^=3.84+0.14·x Theater revenue(x) Rental revenue(y) 30.7 4.6 60.6 16.1…

Q: A news article that you read stated that 51% of voters prefer the Democratic candidate. You think…

A:

Q: grade = -0.147+0.981(Pre statistics grade). What does the -0.147 tell us? A student who earns a 0…

A: regression equation introductory statistics grade = -0.147 + 0.981(pre statistics grade)we have to…

Q: Sports scientists want to use nuclear magnetic resonance spectroscopy, NMR, to predict the muscle…

A: Given: Sports scientists want to use nuclear magnetic resonance spectroscopy to predict the muscle…

Q: Correlation Matrix BW WL Pearson's r p-value Pearson's r p-value BW 0.649 <.001 WL

A: The objective is to validate if there is a linear relationship between BW and WL at the population…

Q: 17-5. You are offered the following gamble based on coin flips. If the first head occurs on the…

A:

Q: University Food service is interested in the percentage of students on campus who would choose a…

A:

Q: percentage of women have weights that are within those limits? Are many women excluded with those…

A: Solution: Let X be the women weights are normally distributed with mean 164.1 lb and a standard…

Q: 6 7.54 A. +x (Round to two decimal places as needed) Le a scatterplot of the data. Choose the…

A:

Q: The fuel economy sticker on a new SUV's window sticker indicates the owner can expect 16 mpg in city…

A: From given data we have : X 17.6 17.7 18.1 22 17 19.4 18.9 17.4 21 19.2…

Q: According to a 2006 survey conducted by the Center for Disease Control and Prevention (CDC), birth…

A: Chi square is used to determine whether the variables are independent or not. Chi square test are of…

Q: A national computer retailer believes that the average sales are greater for salespersons with a…

A: Given Let sample 1 denote salespersons with a degree. Let sample 2 denote salespersons without a…

Q: Postpartum depression and anxiety (PPD), is a common medical condition affecting mothers and their…

A:

Q: In a survey of 3.862 adults conceming complaints about restaurants, 1,506 complained about dirty or…

A: From given data we have : n=3662x1=1506x2=1175P1=x1n1=15063662=0.4113P2=x2n=11753662=0.3209

Q: Determine whether or not the table is a valid probability distribution of a discrete random…

A: Since we know that sum of probability is always equal to 1 i.e. ∑P(x) = 1

Q: The restaurants of a fast food chain are primarily located in three regions of Tennessee. The CEO of…

A: The question is about ANOVA Given :   To find : Whether or not the avg. monthly revenue for 3…

Q: For extra credit, Sal can choose his bonus points from a stack of 5 sealed cards.  Each card has one…

A: Introduction: There are 5 sealed cards to choose from, at the beginning.

Q: Select a 99% confidence interval for the true mean of damaged items

A:

Q: Find each for the numbers: 1, 15, 4, 11, 7, 17, 3, 10, 9, 8 Q1  Q2  Q3  IQR =

A: Arrange the given data in ascending order1, 3, 4, 7, 8, 9, 10, 11, 15, 17Sample size(n)=10

Q: Situation: The Ipod Touch has been out for two years now and a lot of data has been collected.…

A: The question is about regression Given :   To find : A ) Linear model using regression B ) Squared…

Q: Click to view For the table. Click to page 2 of the table The indicated IQ score, x, is (Round to…

A: It is given that  Mean, μ = 100 Standard deviation, σ = 15 Z-Score, Z = ( X - μ )/σ

Q: Final averages are typically approximately normally distributed with a mean of 72 and a standard…

A: given data normal distributionμ = 72σ = 12.5top 8% will get grade A

Q: 4 B Count sum 1st group 2nd group 3rd group 32 28 26 27 4 113 28.2 Between Group total of both…

A: Given data: Group 1 Group 2 Group 3 32 20 12 28 24 14 26 22 18 27 18 10

Q: Problem 1 In order to maximize the yield of a certain process, an engineer studied the impact of…

A: Given information: 1 2 3 4 5 - - - + - + - - - + - + - - + + + - + - - - + - - + - +…

Q: Determine the conditional probability distribution of Y given that X = 1. Where the joint (x + y)…

A: It is given that the joint probability density function is  f(x, y) = (1/27)(x + y),   0 &lt; x &lt;…

Q: A study was made to determine if the subject matter in a physics course is better understood when a…

A: The following information has been provided: x¯1=85s1=4.7n1=11x¯2=79s2=6.1n2=17 It is assumed that…

Q: Pre-Statistics and Statistics Course Grades: We recorded the pre-statistics course grade and…

A: Given The linear regression equation is as follows: Predicted introductory statistics…

Q: many aspects of n organizat tion mon umbers are often used as a baseline to assess om school even…

A: Given,   An organization monitors many aspects of elementary and secondary education nationwide.…

Q: The lifespan (denoted by X) of a particular brand of light bulb is normally distributed with a mean…

A: Here we have given X : lifespan of particular brand of light bulb X is normally distributed with of…

Q: P(R2 | A3)= P(Not(R2&A2))=

A: Based on the given info,  PR2∩A3=19390                      =0.0487 PA3=118390           =0.3026

Q: The ages 1:00 pm and 1:15 pm are given. the 80th percentile? 5, 8, 10, 15, 16, 17, 18, 21, 25

A: We have given that,  The data set are,  5, 8, 10, 15, 16, 17, 18, 21, 25 Then,  We will find the…

Q: 13) Calculate the average value index. Give it as a percentage, but please do not use % sign. A B C…

A: Solution: From the given information,

Q: A doctor wants to estimate the mean HDL cholesterol of all 20-to 29-year-old females How many…

A: The information provided in the question are as follows : Margin of error (E) = 2 Standard deviation…

Q: A manager has determined that out of 100 customers 52 will buy a shirt (5), 44 will buy a tie (T),…

A: Here we have given the information, A manager has determined that out of 100 customers 52 will buy a…

Q: You're examining the effects of two random factors, A and B, using an ANOVA. What should the…

A: The effects of two random factors, A and B are examined.

Q: Data for gas mileage (in mpg) for different vehicles was entered into a software package and part of…

A: Given Total ss=758 Total df

Q: A manufacturing company distributes two brands of clothing. It is found that 100 out of 250…

A:

Q: Find the value of the x² test statistic

A: Based on the observed and expected values and expected values,the squared distances can be computed…

Q: A population of values has an unknown distribution with μ = 109.3 and σ = 47. You intend to draw a…

A: Given that, A population of values has an unknown distribution with mean 109.3 and standard…

Q: 9. pg 224 Oils to make us limber? The extracts of avocado and soybean oils have been shown to slow…

A: Given:-               The extracts of avocado and soybean oils have been shown to slow cell…

Q: Police plan to enforce speed limits during the morning rush hour on four different routes into the…

A: a). P( route A used ) = P(A) = 0.2    P(trap laid on route A) = P(E/A) = 0.4 Similarly  P(B) = 0.1…

Q: Ex which line is the better fit for the data (1,1), (2,3), (2, 2), (3,4), (3,5), (4,3) 1=X 4/2=2x~2.

A: The given data set is: 1,1, 2,3, 2,2, 3,4, 3,5, 4,3 The better fit for the data, i.e., the equation…

Q: Question 5 Thirteen MBA students joined a three-month fitness program because of high cholesterol.…

A: Given The data is as follows: Before After 255 197 230 225 290 215 242 215 300 240…

Q: n₁ = 14, n₂ = 12, x₁ = 21, ₂22, s, 2.5, s₂ -2.8 OA Reject Ho if the standardized test statistic is…

A: We have given that  Sample mean (x̅1) = 21Sample mean (x̅2) = 22Sample size (n1) = 14Sample size…

Q: It currently takes users a mean of 3232 minutes to install the most popular computer program made by…

A:

Q: Region 3: 201.6, 166.8, 308.5, 452.1, 264.4, 298.5, 306, 239.7, 43.6, 52.5, 110.3, 263.1, 305.1 Step…

A: Given that, The restaurants of a fast food chain are primarily located in three regions of…

Q: The Journal de Botanique reported that the mean height of Begonias grown while being treated with a…

A: We have given thatMean(µ) = 45Sample size (n) = 21Sample mean (x̅) = 44Standard deviations (s) =…