Confounding is confusion of effect of the causal variable under study with the effect of other what? unrelated variables frotary variables co-occuring variables accommodating variables

Q: Test the claim that the proportion of people who own dogs is less than 33%. A random sample of 1000…

A: given data  claim : p<0.33 n = 1000 p^ = 0.278 α = 0.01 test statistic(Z) = ?

Q: ere is answer

A: Given μ 5.1 miles σ 0.5 miles x  - random variable which represents the running speed for…

Q: Which interval contains the greatest amount of data? A. O 0-50 B.O 50-100 C.75-125 D.O 125-175 E. O…

A: Answer:- Given boxplot is  From the boxplot,  Minimum= 25 First quartile Q1 = 50 Second quartile ,…

Q: Imagine that you are a researcher interested in examining the impact of taking daily walks on a…

A: The question is about central limit theorem Given : Popl. mean score ( μ ) = 68 Popl. std. deviation…

Q: 2.41 Cost of breakfast. Sally gets a cup of co↵ee and a muffin every day for breakfast from one of…

A: Given that :  The average price of a cup of coffee is $1.40 with a standard deviation of 30¢($0.30)…

Q: The following data represents results from an experiment comparing 3 treatment conditions for the…

A: The question is about ANOVA Given : No. of obs. under treatment 1 ( n1 ) = 4 No. of obs. under…

Q: The exponential distribution is a special case of______?

A: Given that The exponential distribution is a special case of  Note: According to bartelby question…

Q: Left handed & right handed players on a baseball team Nominal Ordinal Interval Ratio

A: There are two types of data: Quantitative and Qualitative, Quantitative data is a set of values…

Q: (ii) Show that {Xt} is stationary.

A:

Q: Suppose the lengths of the prognancies of a certain anmal are approximately normally distributed…

A: Given that: Population mean, μ=154 Population standard deviation, σ=16

Q: Calculate the simple composite index for the September price of the portfolio using February as the…

A: Index number  Given base year is February.

Q: In mid-2015 the U.S. population was about 321 million. The national debt was well over $18 trillion.…

A:

Q: dolph's electronics makes sets of christmas lights. on average, 4% of the bulbs produced by their…

A: given data, rudolph's electronics makes sets of christmas lights. on average, 4% of the bulbs…

Q: The data below shows the number of people who enter Macy's store in 40 states. a) Find the mean,…

A: Given data: Data 5456 3245 2345 4546 5887 6798 3453 1236 763 458 2654…

Q: A certain company makes three grades (A, B, and C) of a particular electrical component.…

A: The question is about confidence interval Given : Randomly selected no. of components ( n ) = 200…

Q: 19. Approval 2011 In November 2011, Barack Obama's approval rating stood at 45% in Rasmussen's daily…

A: Given information p=50%, n=1500, p^=45%

Q: a) Forecasted sales for year 6 using a 3-year moving average is b) The MAD for a 3-year moving…

A:

Q: of four cans are selected. Find the number of elements in the sample space. oping

A: Let us consider d as diet cola and r as regular cloa 1. If two consecutive cans of the same type of…

Q: mean = I (round to 4 decimal places)

A: It is given that the grouped data. We have  Mode = 67 Median = 62

Q: The probability density function for the time taken to complete a 1-hour test (X) by students is…

A: Given information: fx=cx2+x    , 0≤x≤10              , elsewhere

Q: A consumer watchdog group estimates the mean weight of 1-ounce fun size candy bars to see if…

A: It is given that  The 95% confidence interval is  CI = ( 0.994, 0.998 ) Sample size, n = 40

Q: The amount of spending rounded to the nearest thousands of dollars for education per student for a…

A: It is given that the amount of spending rounded to the nearest thousands of dollars for education…

Q: The Random Effects estimator a) Requires that the idiosyncratic errors are serially correlated b)…

A: Solution:- The Random Effects estimator is a technique used to estimate parameters in a linear…

Q: A random sample of 150 recent blood donations at a certain blood bank reveals that 82 we type blood…

A: Givensample size(n)=150x=82sample proportion(p^)=xn=82150≅0.5467

Q: QUESTION 2 A mental health survey found that anxiety had occurred in every 2 out of 100 adults. a)…

A: In this case, each individual adult has only options of "having anxiety" (defined as success) or…

Q: (1) (11) (111) Write down the estimated model for the House Size Interpret the coefficients of the…

A: Comment: As per the our company guidelines we are supposed to answer only three subparts. Kindly…

Q: In a previous quarter, students were not given thorough directions for how to make the sucrose…

A: From the plot 1, The regression equation is, y=0.456x-0.163R2=0.983 From the above plot, it is…

Q: A new beta-blocker medication is being tested to treat high blood pressure. Subjects with high blood…

A:

Q: Of the 37 million borrowers (Type a whole number.) had less than $10,000 in debt.

A: Given that, a pie chart of the amount of student loan obligations.  Total no. of borrowers =…

Q: You are the administrator of a government agency.  You have collected for a random sample of 51…

A: A random sample of 51 households of 4 people having data concerning the monthly household food…

Q: Geography North American Product Classification System (NAPCS) Spruce, pine and fir, production5 I…

A:

Q: 22.5% trade discount on a Samsung laptop represents a discount of $199.57 from the suggested retail…

A: We have given that 22.5% discount is there which is equal to $199.57

Q: Calculate the geometric mean return for the following data set: (Negative value should be indicated…

A: Solution:

Q: A: GDP will rise 3%. This will send the S&P ETF to 414. Scenario B: GDP will stagnate. S&P ETF will…

A: Given ,The Iron Condor strategy is a combination of a bear put spread and a bull call spread,…

Q: As director of human resources you have collected data on college major and commuting time (in…

A: As director of HR, I have collected data on college major and commuting time between home and work…

Q: dy of the ability of individuals to walk in a straight line reported the accompanying data on…

A: A study of the ability of individuals to walk in a straight line reported the accompanying data on…

Q: The average cost of a vehicle at a particular dealership is $19,500, with a standard deviation of…

A: The question is about normal dist. Given : Popl. mean cost of a vehicle ( μ ) = $19500 Popl. std.…

Q: Use the table below to answer questions 1-3. Suppose we want to estimate the annual high…

A: A population is an entire group that you want to draw conclusions about whereas a sample is a…

Q: Assuming that the heights of college women are normally distributed with mean 69 inches and standard…

A: Given that: Population mean, μ=69 Population standard deviation, σ=1.8

Q: In a large population, 61 % of the people have been vaccinated. If 4 people are randomly selected,…

A: The question is about discrete probability distribution Given : Popl. prop. of people have been…

Q: Customers are used to evaluate preliminary product designs. In the past, 92% of highly successful…

A:

Q: A committee of 5 is to be selected from a group of 6 men and 9 women. Suppose the selection is made…

A: Given that  Men=6, Women=9, Total=6+9=15 A committee of 5 is to selected from the group

Q: A simple random sample of size n = 200 is obtained from a population whose size is N = 25,000 and…

A: We have given that n = 200 N = 25000 p = 0.65

Q: 23

A: Data given  142,156,168,174,181,178,179,179,174,178,163,167,153,145

Q: Acme Shoes marked up a pair of shoes from the $43.00 cost to $75.00. To the nearest 0.01%, what is…

A: We have given that Mark up price = $43.00 Cost price = $75.00

Q: Directions: Solve the following. Show your complete solution. Fifty randomly selected jeepneys were…

A: Given that n=50

Q: To estimate the average lifetime of a certain type of battery a random sample of 64 batteries is…

A: Given,sample size(n)=64sample mean(x¯)=4.5standard deviation(s)=0.4

Q: Assume that 100 representatives must be apportioned to the following set of states with the given…

A:

Q: Given independent random variables with means and standard deviations as shown, find the mean and…

A: As per the Bartleby guildlines we have to solve first question and rest can be reposted.... Given…