Which ONE of the following is the benefit of using simple random sampling? Select one: A. The results are always representative. OB. Interviewers can choose respondents freely. OC. We can calculate the accuracy of the results. QD. Informants can refuse to participate 4 Your answer is incorrect.

Q: charge rates for annual tutoring services has a standard deviation of $1000, what is the probability…

A: Standard deviation=1000, Sample size=300

Q: A 98% confidence interval for the difference in the population means is V P₁

A: Confidence level = 98% Sample 1 Mean = 483.58 Sample 2 mean = 325.78 s1 = 44.23 s2 = 23.20 n1  = 16…

Q: Consider the following data set: 0,7,4,14,-3,-1,11 Find the lower quartile.

A: The given data is 0, 7, 4, 14, -3, -1, 11.

Q: For the data and sample regression equation shown below, complete parts (a) through (c). 0 4 4…

A:

Q: Bluereef real estate agent wants to form a relationship between the prices of houses, how many…

A: The regression output for the dependent variable house price with independent variables bedrooms,…

Q: A study was conducted to examine the effect of heat and duration of stretching on the extensibility…

A: μA=0.678μB=0.414μC=1.316μD=1.382 L=μA+μB2-μC-μD2

Q: Suppose that a researcher, using data on class size (CS) and average test scores from 100…

A: Thank you for your question. As per the honor code and guidelines, we suppose to answer the first 3…

Q: A survey was conducted that asked 963 people how many books they had read in the past year. Results…

A: From the provided information, Sample size (n) = 963 Mean (x̄) = 14.7 Standard deviation (s) = 17.8…

Q: An insurance company checks police records on 582 accidents selected at random and notes that…

A: According to the given information, we have Given that an insurance company checks police records on…

Q: Compute the internally-studentized residuals corresponding to each chimpanzee.      2. Which…

A: We are trying to see whether there is a relationship between the number of hours of learning a task…

Q: A market researcher for a consumer electronics company wants to study the media viewing behaviour of…

A: given data sample size (n) = 41sample mean ( x¯ ) = 38sample standard deviation (s) =6.998% ci for…

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

A: Here the given information The National Longitudinal Study of Adolescent Health interviewed several…

Q: Do wearable devices that monitor diet and physical activity help people lose weight? Researchers had…

A: Consider μd is the mean weight difference, weight after 24 months minus weight before using the…

Q: a) Show that for two independent random variable X, Y MX+Y (t) = MX(t)MY (t) b) Suppose X is…

A: Suppose X and Y are Binomially distributed with parameters (n,p) and (m,p) respectively. Let Z = X+Y

Q: The table shows the lengths and weights of seven muskies captured by the Department of Natural…

A: The data for the variables x(length) and y(weight) are given.

Q: red data are below. 14.6, 17.3, 17.8, 18.3, 19.1, 19.2, 19.6, 20.5, 20.9, 22.9, 23.4, 23.5, 24.2,…

A: Arrange the data set in ascending order are.  Observations in the ascending order are…

Q: Find the value of the test statistic. (Round your answer to two decimal places.) 9.06 X

A: Given, the scores of the programs A, B and C are A B C 540 450 600 400 540 620 480 400 570…

Q: An amusement park studied methods for decreasing the waiting time (minutes) for rides by loading and…

A: The data of factor A (loading and unloading) with respect to factor B( type of ride) is shown below…

Q: In 2009, an item cost $15.46 with a price relative of 145. Its base year was 1995. What did the item…

A: Cost in 2009=$15.46  Price relative (Base year)=145  We have to find the item cost in 1995

Q: Consider the following time series data. Month 1 2 3 4 5 6 7 Value 25 14 21 13 20 24 16 (a)…

A: The time series data in the question is as follows: Month(t) Value(y) 1 25 2 14 3 21 4 13…

Q: 20.20 You are testing Ho:μ = 100 against H₁:μ = 100 based on an SRS of nine observations from a…

A: 20.20) The level of significance is 0.005. The sample size n is 9.

Q: 9) For the same set of observations on a specified dependent variable, two different independent…

A: The regression shows a relationship between one dependent variable and 1 or more independent…

Q: Assume that the mathematics scores on the SAT are normally distributed with a mean of 500 and a…

A: normally distributed with a mean of  500μ=500 standard deviation of  100σ=100we have to find out…

Q: Suppose you want to check whether a coin is fair or not. You flip the coin 100 times and get 41…

A: The sample size n=100 The number of favorable outcomes X=41 The level of significance α=0.01 The…

Q: Identify the relationship between attributes

A: Correlation: The changes in the value of one variable results in the change in the value of other…

Q: A chain of taco restaurants claims that the population mean of the wait times in their drive-thru…

A: Sample size n=40 Sample mean x¯=3.94. Sample standard deviation s=2.39 Population mean μ=5.39.…

Q: Determine the equation of the regression line,

A: The above table gives the data for the grades on the midterm exam and the grades on the final exam.…

Q: A vending machine is designed to dispense a mean of 7.4 oz of coffee into an​ 8-oz cup. If the…

A: Suppose the random variable x defines the amount dispensed by the wedding machine.

Q: of ortical care doctors unication through video and audio so that a centraled staff of specially th…

A: The formula of third quartile for even numbers of the ungrouped data is, where, n denotes the total…

Q: A nutritionist wants to determine how much time nationally people spend eating and drinking. Suppose…

A: Answer  Given  Sample mean = 1.45 Sample standard deviation = 0.72 Sample size = 962 Confidence…

Q: According to a Pew Research Center study, in May 2011, 33% of all American adults had a smart phone…

A: Each hypothesis test has two types of methods to make decisions. They are: P-value approach…

Q: A certain set of plants were constantly dying in the dry environment that was provided. The plants…

A: Answer: From the given data, a) X = 18 sample size(n) = 50

Q: In a certain country the heights of adult men are normally distributed with a mean of 71.7 inches…

A: It is given that the mean is 71.7 and the standard deviation is 2.5.

Q: 4. Suppose the number of accidents per year in a large factory follows a Poisson distribution with λ…

A: It is given that the variable X( the number of accidents in a factory) follows poison distribution…

Q: The table below brings the time spent (in minutes) on the graded practice test 1 and the scores of…

A: we have given the following data for time spent in minutes x : 11,9,14,7,14,3,1,13,12,11

Q: (e) n = 101 and p Yes No (g) (f) n = 50 and p = 0.2 Yes No X Yes No = 0.60 n = 65 and p = 0.2 X

A:

Q: 3. At graduation, 11 friends decide to take a group picture together. In how many ways can this…

A: 11 friends ,  Want to take a group picture together No. of ways = ? (Group of friends can be…

Q: What is the z-score corresponding to x=27, if bar (x)=23 and SD=3.2

A: According to the given information, we have Sample mean, bar (x)=23 Standard deviation, SD = 3.2 Raw…

Q: 20.19 You have an SRS of nine observations from a Normally distributed population. What critical…

A: As per the Bartleby guildlines we have to solve first question and rest can be reposted.... 20.19…

Q: According to a 2009 Reader's Digest article, people throw away approximately 90% of what they buy at…

A:

Q: You are conducting a study to see if the proportion of voters who prefer Candidate A is…

A: Given that, Candidate A is significantly different from 0.74 It means that this is two tailed test

Q: The article "Well-Fed Crickets Bowl Maidens Over"† reported that female field crickets are attracted…

A: The sample size is 32 The sample mean is 101 The sample standard deviation is 40 We have to test…

Q: Given the regression equation for variables X and Y as: Y^ = -12 +1.8 x Predict the score for x =…

A: Answer: From the given data, The regression equation for X and Y variables is: Y⏞ = -12 + 1.8 x

Q: What is the Standard Error of the Mean Difference?

A: A research team is interested in investigating the effectiveness of a new medication intended to…

Q: It is known that the zinc concentrations are usually normally distributed and have a variance of…

A: The sample size: n=22 The sample mean: x¯=2.6 The population variance: σ2=0.09 Confidence level…

Q: 6. A shopper is chosen at random from a department store. If the person's probability of having…

A: Probability of having blond hair and glasses, PB∩G=0.08 Probability of wearing glasses, PG=0.36

Q: For X∼normal with μ=2, σ=3 and a sample size of 29, P(X¯>3)= Note: round your z score to two…

A: X∼normal with μ=2, σ=3  n=29

Q: mple of size 50 from a normal distribution has sample mean 5 and sample variance 20. Find 96%…

A: n=50sample mean =5sample variance =20comfidence interval=0.96we have to find out the 96% confidence…

Q: Find the critical​ t-value that corresponds to 98​% confidence. Assume 29 degrees of freedom.

A: Confidence level (c) = 98% = 0.98Significance level (α) = 1 - 0.98 = 0.02

Q: An upper tail area should be found since the test statistic, z = 2.92, is positive. The area under…

A: A standard normal distribution i.e., z-distribution is symmetrical with mean 0 and standard…