The time (in minutes) between arrivals of customers to a post office is to be modelled by the Exponential distribution with mean 0.680.68.

Q: The 90% confidence interval is from to (Round to three decimal places as needed.)

A: Given,n=400x=32p^=32400=0.08α=1-0.90=0.10α2=0.05 Zc=1.645     (use excel formula =NORM.S.INV(0.90 +…

Q: machine uses electrical switches that are known to have a 3% fail rate for each use. The machine…

A: Note:- "Since you have posted a question with multiple sub parts, we will provide the solution only…

Q: Provide an appropriate response. The proportion of adults aged 15-49 who are living with HIV/AIDS is…

A:

Q: Biologists have found that there is a relationship between the rate of a cricket's chirp and the…

A: The least square equation of regression line is given as- y^=43.31+2.09x where y denotes temperature…

Q: ordering cost, and sales quantity. (Hint: Use the Uncertain Profit example as a template, BUT there…

A: • Create a column for the ordering cost and use the TRIANGLE function to generate 100 trials based…

Q: It is believed that gasoline price is determined by the oil price and the overall economic activity…

A: The regression output is given.

Q: A traffic safety company publishes reports about motorcycle fatalities and helmet use. In the first…

A: From the information, given that N=2073. The given data is as follows :

Q: Consider a sample of 47 football games, where 30 of them were won by the home team. Use a 0.10…

A: sample size = n = 47  x = 30  sample proportion =  x/n = 30/47 =0.6383 alpha = 0.10

Q: Please no written by hand solution Suppose the Monty Hall Problems has 4 doors! You start off…

A: Given that, No. of doors = 4  To find the prob. that car is behind door C.

Q: Question 6                              A researcher wishes to test the claim that on average more…

A: Let us take a sample randomly Assume the sample taken from a population follows a normal…

Q: These are the summary statistics for independent simple random samples from two populations. x1=23,…

A: First sample: Sample size n1=10 Sample mean x¯1=23 Sample standard deviation s1=2 Second sample:…

Q: Part a) Assuming a population standard deviation gross earnings of 0.48 million dollars, obtain a…

A: Standard deviations σ=0.48, level of significance ɑ=0.01, n=30, sample mean X̄=2.35

Q: Rock band The Rolling Stones have played scores of concerts in the last twenty years. For 30…

A: Here the given information is,      Rock band The Rolling Stones have played scores of concerts in…

Q: (d) What is the probability that a random sample of 49 pregnancies has a mean gestation period of…

A: Let, x denotes the length of pregnancy and it is given that: x~N266,16

Q: A random sample of 77 different cereals was taken. Information on each cereal's grams of dietary…

A: It is required to determine whether the sample correlation coefficient between carbohydrates and…

Q: Baseball regression line prediction: Suppose the equation for the regression line for the number of…

A: From the provided information, The regression line is y=-640+6000x x = The team's batting average.

Q: A poll found 51% of a random sample of 1093 preschoolers said they saw Santa Claus. Determine the…

A: Suppose p is the true population proportion of pre-schoolers, who said they saw Santa Claus.

Q: A. a statement that the data are all 0. B. the probability of observing the data you actually…

A: Hypothesis testing is a statistical method that involves testing a hypothesis about a population…

Q: The table below gives the age and bone density for five randomly selected women. Using this data,…

A: Age Bone Density 37 343 41 330 58 318 61 314 67 312

Q: Using the Excel output reported above, if we were to test to see whether "Attendance" is…

A: The test is to check whether "Attendance" is statistically significantly associated with "Score…

Q: lick here to view the data table. Click here to view the table of critical values for the Pearson…

A: A correlation coefficient is a measure that indicates the direction and strength of relationship…

Q: Because it is calculated originally from the sum of squared deviations, which statistic is…

A:

Q: The number of pizzas consumed per month by university students is normally distributed with a mean…

A: Mean=10, Standard deviation=3

Q: and the man is asked to predict the outcome in advance. He gets 16 out of 21 correct. What is the…

A: We can use the binomial distribution to model the probability of the man getting a…

Q: For the specified margin of error and confidence level, obtain a sample size that will ensure a…

A: margin of error : E = 0.03 90% ci for p n = ?

Q: x 1. Determine if the following tables represent a linear, quadratic, or exponential relation using…

A: The data sets are given as- x y 1 14 2 19 3 24 4 29 5 34 6 39 x y 0 0 2 -4…

Q: each month for nine months. OB. The mode will have the greatest change. If the students read only…

A: It was stated that the number of books the Jefferson Middle school students read each month for nine…

Q: In a recent research poll, 32 of 100 randomly selected men in the U.S. were able to identify India…

A: For men: The sample size, n1=100 The no. of sampled individuals, who were able to identify India on…

Q: Find the area of the shaded region. The graph to the right depicts IQ scores of adults, and those…

A:

Q: Given the following ground truth data, choose the best model prediciton, based on the mean absolute…

A: Given the following ground truth data: [0.1, 0.3, 0.5, 0.2, 0.3, 0.6] We need to choose the best…

Q: e: For each confidence interval, enter your answer in the form (LCL, UCL). You must include the…

A: Sample size n =47 Sample mean=109 Population standard deviation =32

Q: Can you find me an example of a grouped histogram on the internet, where the independent variable is…

A: As per our Q&A guidelines, we can answer any 3 subparts. For the remaining sub questions to be…

Q: A chi square goodness of fit test is to be performed. The relative frequencies for the null…

A: The relative frequencies that is hypothesized to be consistent under H0 for the distribution is:…

Q: Two major automobile manufacturers have produced compact cars with engines of the same size. We are…

A: Driver Manufacturer A Manufacturer B 1 32 28 2 27 22 3 26 27 4 26 24 5 25 24 6 29 25 7…

Q: sloths <- read.csv(url("http://whitlockschluter3e.zoology.ubc.ca/Data/chapter11/chap11q26Sl…

A: One-sample t test is a parametric test that helps to determine whether there is difference between…

Q: The mean of a set of 13 numbers is 16. If a number is removed from the dataset, the resulting mean…

A: The mean of set 13 numbers is 16

Q: Use normal approximation to estimate the probability of getting at least 54 girls in 100 births.…

A: Given,      sample size n=100                         P=12      and  nP=100×12=50&gt;10…

Q: Consider the accompanying data on x = research and development expenditure (millions of dollars) and…

A: The data for the research and development expenditure and growth rate is given.

Q: I am confused on the last 2 steps. Where does the 0.7257 come from?

A: Answer  Given  Mean =88 Standard deviation =5

Q: Let Z be a random variabale satisfying N(0, 1). Without using the normalcdf(...) function, find P(Z…

A: Given that,       Z be a random variable satisfying N(0,1)  We have to find  P(Z&lt; 0 or Z&gt;3 )…

Q: a) P(X=5) when λ=2.5 P(X=5)= (b) P(X≤5) when λ=4 P(X≤5)= (c) P(X>3) when λ=0.5 P(X>3)=

A: Let X is a random variable having a Poisson(λ) distribution a): (a)  P(X=5) when λ=2.5 then to find…

Q: In a test of the difference between the two means below, what should the test value be for at test?…

A: sample 1  Mean(x1)=520 sample variance(s12)=500 standard deviation(s1)=500=22.36067977 sample…

Q: 15. Construct the confidence interval for the population mean μ. c = 0.90, x=9.1, a=0.2, and n = 58…

A: Solution:- From given information  mean x¯ =9.1standard deviation σ=0.2sample size n=58

Q: A variable of a population has a mean of μ=200 and a standard deviation of σ=21 a. The sampling…

A: Population mean, μ=200 Population sd, σ=21

Q: -10-8-6 -4 10- 8 -2 6 4. 2- -2 4 -6- -8- 10 ... Consider the scatterplot given above. Which of the…

A: The correlation value for the scatter plot is determined below as follows:   From the given scatter…

Q: The authors of the paper "Statistical Methods for Assessing Agreement Between Two Methods of…

A: The variable y is Wright meter reading.

Q: Assume that when human resource managers are randomly selected, 52% say job applicants should follow…

A: probability of job applicants should follow up within two weeks(p)=0.52 sample size(n)=11 Let "x" be…

Q: (a) a = 0.01, P = 0.06 answer: (b) a = 0.07, P = 0.06 answer: (c) a = 0.06, P = 0.001 answer:

A: (a)Level of significance ɑ=0.01, p value=0.06   (b)level of significance ɑ=0.07, p value=0.06 (C)…

Q: Prof. Johnson conducts a hypothesis test on whether the proportion of all UBC students who bike to…

A: given H0:P=0.30 against Ha: P≠0.3. p-value for this test is =0.01.

Q: Given below are the number of successes and sample size for a simple random sample from a…

A: The error that occurred in the sample can be calculated using the margin of error. The margin of…