In a recent study on world happiness, participants were asked to evaluate their current lives on a scale from 0 to 10, where O represents the worst possible life and 10 represents the best possible life. The responses were normally dis with a mean of 6.1 and a standard deviation of 2.3. Answer parts (a)-(d) below. (a) Find the probability that a randomly selected study participant's response was less than 4. The probability that a randomly selected study participant's response was less than 4 is 0.1806. (Round four decimal places as needed.) (b) Find the probability that a randomly selected study participant's response was between 4 and 6. The probability that a randomly selected study participant's response was between 4 and 6 is (Round to four decimal places as needed.)

Q: Question 4: Trying to determine the number of students to accept is a tricky task for universities. ...

A:

Q: Q9. The diagram is the distribution of the Standard Normal variate, Z. wwww w 0.5 0.4 0.3 .025 .025 ...

A: We have given that.   X~N( μ , ?^2 )   μ =0 , ? =1   Z-score =( x - μ )/?

Q: The effectiveness of a blood-pressure drug is being investigated. An experimenter finds that, on ave...

A:

Q: Demand for stereo headphones and MP3 players for joggers has caused Nina Industries to grow almost 5...

A:

Q: 5. Which of the foilowing values is not the value of the probability of the random variable? A. 1.01...

A: Solution (5) Probability is always between 0 and 1 So, answer option (A) Because 1.01 is great than ...

Q: Permutations are concerned with the number of ways O of selecting n ordered elements from a populati...

A:

Q: Find the critical value tc for the confidence level c=0.99 and sample size n=19. tc=

A: Ans#-  Find the critical value tc for the confidence level c=0.99 and sample size n=19.

Q: A mahufacturer buys computer chips from a supplier. The supplier sends a shipment containing 10% def...

A:

Q: Target wants to know if their online sales are above what they observed last year during the pandemi...

A: Given that; A hypothesis is given and a decision is also made. By using hypothesis concept I solve t...

Q: 2. Let events A and B be mutually exclusive events. Suppose P(A) = .29 and P(B) = .32 (a) What is th...

A: GivenP(A)=0.29P(B)=0.32A and B are mutually exclusive events

Q: A student calculates the value of r as +0.72 for a question comprising 5 pairs of observations and c...

A:

Q: Calculate range and its co-efficient from the following statistical data: Profits ( $ in 000’s) 125,...

A:

Q: The probability that event A will occur is P(A) = 0.36. What is the probability (in decimal form) th...

A:

Q: Example 7-18. Show that eitx =1+ (eit - 1) x(1) + (eit – 1)². T+.. x(2) + (eit – 1)* . r! where xr) ...

A:

Q: 13 10 12 7 Standard 8 14 How many students competed in Smooth or Rhythm, but not Standard? 28 How ma...

A: From the given Venn diagram How many students did not complete in Rythm ?

Q: Using correct notation, answer the following.: of a) What proportion of respondents have a college d...

A: Given that   Note: According to bartleby experts question answers guidelines an expert can solve onl...

Q: Suppose that the following statistics are calculated for the electricity cost based on two samples. ...

A: The measure of central tendency provides a measure about the center of the set of the observations.

Q: d) What proportion of college graduates believe in the theory of evolution? Use three decimal places...

A: d) From the given information, the number of college graduates believe in the theory of evolution is...

Q: Sixty percent of consumers prefer to purchase electronics online. You randomly select 8 consumers. F...

A:

Q: Forty-five percent of consumers prefer to purchase electronics online. You randomly select 8 consume...

A: Ans#- Given P = 45%   = 0.45  0f consumers prefer to purchase electronics online.             You ra...

Q: researcher is interested in finding a 95% confidence interval for the mean number of times per day t...

A: We have given that  Sample size n =140 Sample mean =34.8 Standard deviation =15.8 95%confidence inte...

Q: Q3. In a binomial distribution of k Successes from n trials: The number of different sequences is gi...

A: The number of different sequences is given by kCn is TRUE.  So, Statement | is TRUE.

Q: Giving a test to a group of students, the grades and gender are summarized below   A B C Total Male...

A:

Q: Use the confidence interval to find the margin of error and the sample mean. (0.206,0.390) M...

A: Ans#-  Use the confidence interval to find the margin of error and the sample mean.            (0...

Q: In a private school students can choose only of French, Spanish or Music as their Elective. In a gro...

A: i. The contingency table is given as follows:   Spanish French Music Total Males 2...

Q: Find the area under the curve when z< 0.91. Select the correct response: O 0.1418 0.1814 O 0.4181 0....

A:

Q: Find the margin of error for the given values of​ c, σ​, and n.   c=0.95​, σ=3.4​, n= 49   E=

A: Given that, c=0.95​, σ=3.4​, n= 49   The formula for calculating the margin of error is, Critical ...

Q: Q3. Ina binomial distribution of k Successes from n trials: I. The number of different sequences is ...

A: Option D is the answer.

Q: Manny creates a new type of bowling ball. His new model knocked down an average of 9.46 pins, with a...

A: Effective size is used to compare the effectiveness of two different methods wrt. magnitude.  

Q: Draw a normal curve with a mean of 66 and a standard deviation of 14. Describe how you construct...

A:

Q: researcher is interested in finding a 98% confidence interval for the mean number of times per day t...

A: We have given that  Sample size n =106 Sample mean =30.3 Standard deviation =15.4 98% confidence int...

Q: height and head circumference. She randomly selects 8 children from her practice, measures their hei...

A:

Q: Compute the linear correlation coefficient. The linear correlation coefficient for the four pieces o...

A: The data set shows x and y values.

Q: Eighty-eight residents of an Indian city, who were interviewea auring a sample survey, are classifie...

A:

Q: Assume that a sample is used to estimate a population mean μμ. Find the 90% confidence interval for ...

A: We have given that  Sample size n =39 Sample mean =74.7 Standard deviation =19.7

Q: . You decided to collect a bunch of cans of soda and measure the volume of each can. Let x be the nu...

A:

Q: The effectiveness of a blood-pressure drug is being investigated. An experimenter finds that, on ave...

A: We have given that,  Sample mean (x̄) = 60.9, standard deviation (s)= 16.9 and sample size (n) = 21 ...

Q: Q10. Xis a normally distributed variable. Given the following probabilities find the E(X). Pr(x 20)=...

A:

Q: A small-town mechanic says that 8% his customers come in for an oil change. When 1000 samples were d...

A:

Q: Consider a random sample X1,..., Xn with n > 3 from the exponential distribution with parameter > 0 ...

A: Given that X1,......,Xn are random samples with n&gt;3 from the exponential distribution. The densit...

Q: Construct a 95% confidence interval for the population mean for sample A. (Type integers or decimals...

A: For sample A  given data is  1,1,2,3,6,7,8,8

Q: For the set of scores 5,10,10,15,25 calulate the mean, median,mode,range variance, and standard devi...

A: We have given that data  5,10,10,15,25 Mean = sum of all observations/total number of observations  ...

Q: As a warehouse manager, it is your responsibility to inspect a large shipment of components for defe...

A:

Q: A newsgroup is interested in constructing a 90% confidence interval for the proportion of all Americ...

A: The random variable X follows normal distribution. The number of successes is 433. The sample size i...

Q: Question 2: A recent study investigated the impact of psychological stress on men's judgments of fem...

A:

Q: Explain the difference between absolute and relative dispersion. If 20 is subtracted from every obse...

A:

Q: Given the following data on types of vaccines given in Malaysia (A = AstraZaneca; P = Pfitzer; S = S...

A:

Q: You measure 22 backpacks' weights, and find they have a mean weight of 30 ounces. Assume the populat...

A: Givensample size(n)=22Mean(x)=30standard deviation(σ)=11.8confidence interval=90%

Q: n. arate the answers with commas. NO SPACES.) st eight have adequate earthquake supplies? Round Il o...

A: *Answer:  D) P(X&gt;=8) = P(X = 8) + P(X = 9) + ………….. + P(X=12) = 12C8 0.38 (1-0.3)12-8 +…………………………...

Q: (b) Determine the logarithm of the y-values so that Y = log y. Draw a scatter diagram of the transfo...

A: The table shows x and y values.