Use the confidence interval to find the estimated margin of error. Then find the sample mean.   A biologist reports a confidence interval of (3.9,5.5) when estimating the mean height​ (in centimeters) of a sample of seedlings.

Q: From the following data calculate first four moments and also find the value of r, Monthly profits N...

A:

Q: From the data given below find : (a) the two regression equations. (b) the coefficient of correlatio...

A:  Regression equation Y on X is given by, ŷ = bx+a Where  b= {n*∑xy-(∑x)*(∑y)}/{(n*∑x^2-(∑x)^2} And  ...

Q: Example 2. From the fixed base index numbers given below, calculate the Link Relatives: Year: 2000 2...

A:

Q: Nlustration 12.14. Trend equation for yearly sales (in 1000 Rs) for a commodity with year 1971 as or...

A:

Q: "The weights of 1,000 children, in average, is 62kg with standard deviation of 16kg. Suppose the wei...

A:

Q: A 6-sided die rolled twice. Let E be the event "the first roll is a 4" and F the event "the second r...

A: From the provided information, A 6-sided die rolled twice. E be the event that the first roll is a 4...

Q: For continuous random variable X with f(x) as its pdf, the cdf is f (u) du O True O False

A: We want to tell you above statement is true or false 

Q: When a production process is operating correctly, the number of units produced per hour has a normal...

A: We have given that  Population mean =103 Population standard deviation =15 Sample size n =9

Q: Suppose data X1, ..., Xn are sampled from the population, sample mean is a random variable

A: It is given that Sample : x1, x2,......,xn

Q: . Compute Standard deviation from the following data 60 Marks 10 20 30 40 50 No. of students 20 7 3....

A: Solution is given: Give data:

Q: Seven of the 100 digital video recorders (DVRs) in an inventory are known to be defective. What is t...

A: Given that ; Seven of the 100 digital video recorders (DVRs) in an inventory are known to be defecti...

Q: 1Q scores are measured from 30 children who participated in Head Start and from 32 otherwise compara...

A: Given that For Head Start group, sample size n1 = 30, sample mean m1 = 103 For No Head Start group, ...

Q: The correlation coefficient r=0.45, is given for a sample of n=72 data points. Use the a = 0.05 colu...

A: From the given data determine whether conclude there is a correlation in the population or not.  

Q: Suppose you wish to find the average annu salary for school teachers in the United States. You poole...

A: Given data,Mean μ=53145sd    σ=16451n=31Find 95% CI?

Q: For the example below, what type of correlation would you expect? Degrees of an oven and cooking ti...

A: Given that ; For the example below, what type of correlation would you expect? Degrees of an oven an...

Q: Not everyone pays the same price for the same model of a car. The figure illustrates a normal distri...

A:

Q: The COMPAS data was originally validated by Brennan on a sample size of 2328, and had a success rate...

A: We have given that,  Sample proportion (p̂) = 0.68  and sample size (n) = 2328  Then,  We will find ...

Q: 12. Spacely Sprockets manufactures 24% of their sprockets on Neptune, and the remainder on Pluto. Of...

A: Let us define some events A : sprocket is made on Neptune. B : sprocket is made on Pluto. E : sprock...

Q: A study is undertaken to test the research hypothesis that a student’s knowledge of Thunder Bay impr...

A: The objective is to formulate the appropriate hypothesis, considering the specified population param...

Q: In how many ways can an adviser assign a different task to 9 students from a class of 15?

A: Here we need to assign a different task then we would use combination.   Combination formula: C(n,r)...

Q: For numbers 7 and 8: The seedlings of a particular type of tree are randomly dispersed in a large ar...

A: We have given that λ = 6 Here we will use Poisson distribution to find the required probability

Q: Use the Venn Diagram to determine the following probabilities.

A: Here AS PER POLICY I HAVE CALCULATED 3 subparts kindly REPOST for remaining Here  There are total 80...

Q: that the numbers on them make up a certain four-digit number. Find the likelihood that when installi...

A: Here given , There are total four disks  And on each of the disk there are 5 sector Each sector cont...

Q: 3. Favorite Sport Fifty: people were asked to identify their favorite sport. The responses were F = ...

A: The frequency is the count or number of times an observation occurred in the observation. The indivi...

Q: SmartB” owns a phone battery assembly line which provide phone battery to a mobile company. It is kn...

A:

Q: For a standard normal distribution, find: P(z < c) = 0.1134 Find c rounded to two decimal places.

A: Let Z be the random variable from standard normal distribution with mean = 0 and standard deviation ...

Q: Bob Nale is the owner of Nale's Texaco GasTown. Bob would like to estimate the mean number of litres...

A:

Q: When a production process is operating correctly, the number of units produced per hour a normal dis...

A: a) mean of the sample mean is always equal to population mean E(x¯) = 103.

Q: 16. Two dice are rolled at the same time. What is the chance of getting... a) two even numbers b) a ...

A: When two dice are rolled at the same time. So total no. of possible outcomes will be 6^2=36. These a...

Q: Decreasing the significance level of a would increase the interval between the critical values in tu...

A: There is two type of probability error in the hypothesis statements. They are type 1 and type 2 erro...

Q: A survey asked a random sample students if they estimated they spent more or less than an hour a day...

A: From the provided information,   More Less Total 7th grade 22 14 36 8th grad...

Q: A car hire firm has two cars, which it hires out day by day. The number. of demands for a car on eac...

A:

Q: Problem 3: From an experiment in an industrial process the following data have been obtained (see ta...

A: Given the Experimental data as t ut yt 1 -1 0 2 -1 -0.4 3 -1 -0.69 4 -1 -1 5 1 -1.27 ...

Q: Compute Spearman's rank correlation for the following observation : Candidate 1 2 : 3 4 5 6. 7 8 Jud...

A:

Q: 1. Following data consisting missing observation (X) Commodities Po P1 А 1 10 2 В 1 5 where p and q ...

A:

Q: What is the t test P Value for this Data

A: Given  -  There are 20 observations in Female and 10 observations in Male  n1 = 20, n2=10 Mean of Fe...

Q: A perfect straight line sloping downward would produce a correlation coefficient equal to: O A. -1 В...

A: Given that ; A perfect straight line sloping downward would produced a correlation coefficient.........

Q: Calculate Karl Pearson's coefficient of correlation from the following data: 100 200 300 400 500 600...

A: We have given that data.  Karl Pearson's coefficients of correlation.  r= SSXY/sqrt( SXX*SSYY)

Q: ladders used by  fruit pickers are typically tapered with a wide bottom for stability and a narrow t...

A: Given: an = 19, d = -2.5, a1 = 49

Q: 11 18 24 33 47 59 61 72 (1) Find Quartile 2 (2) Percentile 50

A: Given data, 11,18,24,33,47,59,61,72 Sort the data in ascending order   11,18,24,33,47,59,61,72

Q: H1: u > uo is an upper tailed hypothesis test True or False

A: Given that  H1: u &gt; uo

Q: Illustration 12.11. Given below are the figures of production in thousand quintals of a sugar factor...

A:

Q: What percent of the department faculty have less than 25 years of service? Answer:  % (b) If a memb...

A: From the given histogram we need to answer certain questions. 

Q: Find the critical value zc necessary to form a confidence interval at the level of confidence shown ...

A: Given,confidence level(C)=0.81

Q: 1. In how many ways may 4 people be seated in a row of 10 chairs? 2. In how many ways can a point gu...

A: HERE use permutation and combination 

Q: Consider a multiple regression model XB + €, (n x 1) (n x p)(p x 1) (n x 1) where n = the number of ...

A: Note: Hi! Thank you for the question. As you have posted multiple sub-parts, according to our policy...

Q: An insurance company checks police records on 566 accidents selected at randorm and HolS through d) ...

A: Hey there! Thank you for posting the question. Since your question has more than 3 parts, we are sol...

Q: Let X be a binomial random variable with n = 20 and p = 0.1. a) Find the formula for the probability...

A: We have given that  Number of trials n=20 Success of probability p =0.1 X~binomial ( n ,p)   NOTE:- ...

Q: If a student is selected at random, find the probability that the student is a sophomore or less lik...

A: here as per policy i have calculated first main question  here use bayes rule for required probabili...

Q: of x = 2.882, standard deviation = 1.634  Mean of y = 2.588, standard deviation = 0.246  The corre...

A: Given: x¯=2.882sx=1.634y¯=2.588sy=0.246r=0.159b=0.0239intercept =2.52