The lifetime of watch batteries follow a normal distribution with mean 100 hours and variance 49 hours. If a battery is chosen at ran- dom, determine above what lifetime does the 80 % largest lifetime of watch batteries lie? (A) 84.7 (B) 93.4 (C) 0.9 (D) 103.64 (E) 94.12 Select one: O A.. O B. . O D.. O E..

Q: You are testing the claim that the mean GPA of night students is less than the mean GPA of day stude...

A:

Q: You measure the weights of thirty-six random oranges and find that they have a mean weight of 91 gra...

A: We have given that,  Sample mean (x̄) = 91, population standard deviation (σ) = 3.6, sample size (n)...

Q: During the summer of 2003, a nursing home measured the quality of administering medications to the r...

A:

Q: Question 5 (11 points) Forty-five (45) small communities in the US state of Connecticut reported on ...

A:

Q: Does the background music affect the behavior of supermarket shoppers? An experiment to answer this...

A: Confidence interval : A confidence interval depicts the probability that a parameter can fall betwee...

Q: A population has mean u = 17 and standard deviation o = 4. Find u- and o- for samples of size n = 25...

A:

Q: Send data to Excel Length of smoking cessation period Between Less than two weeks At least one Total...

A: We complete the given data table from the given formula. Expected frequency= row total* column total...

Q: The standard deviation on a final examination was 9, while the mean grade was 72. The best 14% of st...

A:

Q: A statistical program is recommended. A company that sells musical instruments has been in business ...

A: From the given information, Year Quarter 1 Quarter 2 Quarter 3 Quarter 4 Total Yearly Sales 1 5...

Q: e values?

A:   A. Null Hypothesis:   Mean of Baseline(#Symptoms) > Mean of Drug(#Symptoms)   B. Alternative Hy...

Q: Watch your cholesterol: The mean serum cholesterol level for U.S. adults was 195, with a standard de...

A: For part 2 Given: μ=195σ=34n=103

Q: Discuss the usefulness of the Normal Distribution. Properties of various discussions

A: The normal distribution has central limit theorem/ property. According to which if samples of large ...

Q: d 0.997 (Almost All) Unanswered aSave Question 3 Using the Empirical Rule, approximately how much pr...

A:

Q: The probability distribution of the random variable X represents the number of hits a baseball playe...

A: Approximate the mean of the random variable X based on the simulation for 50 games: n Here, n=50 ∑X=...

Q: Population by broad age groups in country A, 1990 & 2011 Country A 2011 Country A 1990 Both Age grou...

A: Hello thank you for the question, According to our honor code can answer only three sub parts at a t...

Q: Suppose that the probability that a passenger will miss a flight is 0.0959. Airlines do not like fli...

A:

Q: Which of the following interpretations is correct? a. We are 95% confident that xˉxˉ lies between...

A: We have given that, Sample size n = 1097 Sample mean = 3.16 Sample standard deviation = 1.91 The 95%...

Q: tion 22.7 Fill in the blanks of the following skeleton table which are marked with question marks. A...

A:

Q: Estimate the difference in population means using a 88% confidence level. Use a calculator, and do N...

A:

Q: The classification was on the basis of three sections: Literature, Fiction and Illustrated News. The...

A:

Q: 21.16. Examine, by any suitable method, whether the nature of area is related to voting preference i...

A:

Q: 22. The following are fasting blood glucose level (mg/di) of 10 children: the value of mean (x) is C...

A: We have given that  I want to find mean. Mean = sum of all observations/total number of observations...

Q: If X ~ N(u, o?) and the standard normal variable Z is such that Z(0, 1), then p(Z < -0.84) is (A) 0....

A:

Q: 72, 51, 67, 68, 61, 69, 58, 56, 60, 56 66, 61, 60, 59, 59, 54, 58, 53, 68, 63 57, 62, 63, 64, 56, 62...

A: Given that; Sample size (n) = 30  At 97% confidence interval.  Standard deviation = 5.3 inches By us...

Q: 30. If e1+81' is the moment generating function of a normal variate X, find P(-1< X <9).

A:

Q: Use the value of the linear correlation coefficient r to find the coefficient of determination and t...

A:

Q: not among the choices, write your answer before the number. 11. What is being represented by z in th...

A: The objective is to choose correct option for given questions since you have posted multiple differe...

Q: Consider the following data for two independent random samples taken from two normal populations. Sa...

A: Mean =ΣXi/n Mean of sample 1: M1= (11+6+13+7+9+8)/6 =7.833 Mean of sample 2:  M2= (8+7+8+4+6+9)/6 =7...

Q: Suppose that a political campaign by Loki estimates that the candidate’s polling percentage y and th...

A: The candidate’s polling percentage is denoted by 'y'.The amount is denoted by x (in hundred thousand...

Q: To estimate the mean height of female high school juniors, you take a random sample of 30 female stu...

A: Option B

Q: There are 15 mobile phones in a package box, 9 of which are iphones. If a person takes 5 phones from...

A: Answer - There are 15 mobile phones in a package box, 9 of which are iPhones.                 If a p...

Q: Give a 98% confidence interval, for μ1-μ2 given the following information. n1=20, ¯x1=2.63, s1=0....

A:

Q: Suppose Z follows the standard normal distribution. Calculate the following probabilities using the ...

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

Q: Which of the four sets of data represents a normal distribution? O { 10, 12, 13, 13, 13, 14, 16} O {...

A:

Q: Suppose that X, Y, and Z are jointly distributed random variables, that is, they are defined on the ...

A: Given that ; E(x) = 0            ;     v(x) = 39 E(y) = -4        ;      v(y) = 19 E(z) = 6        ;...

Q: If from something exam with form choice multiple as many as 50 questions . Every question have 4 alt...

A: Note: In case of multiple questions, as per the guidelines answer to first three parts will be provi...

Q: YOU receve a brochure trom a large university The brochure indicates that the mean dlass size for fu...

A:

Q: Suppose that we've decided to test Clara, who works at the Psychic Center, to see if she really has ...

A:

Q: The random-number generator on calculators randomly generates a number between 0 and 1. The random v...

A: Given that  The random-number generator on calculators randomly generates a number between 0 and 1. ...

Q: Change each rat’s score to its z-score equivalent On which diet did the rat score in the highest pos...

A: Note: According to Bartleby expert guidelines, we can answer only first question with their three su...

Q: Mustration. 21.24. Do you find any inconsistency in the data N=1000, (43)=483, (AY)=378, (BY)=226 (A...

A:

Q: 23. Urinary concentrations of lead in 13 children were: 2.6, 0.1, 1.1, 0.4, 0.8, 1.3, 1.2, 1.5, 3.2,...

A:

Q: Test the claim that the proportion of men who own cats is smaller than the proportion of women who o...

A:

Q: a) the probability that exactly 8 buy anew a new coDy b) the probability that more than 3 buy a new ...

A:

Q: 3. Suppose that in a casino, a certain slot machine pays out an average of Php 15, with a standard d...

A: a. You may win much or nothing, as the range is wide. b. EX1= 20-15=5EX = E∑1≤i≤5 Xi = 5EX1= 5×5= 25...

Q: Draw a normal curve with u= 56 and o = 15. Label the mean and the inflection points. Choose the corr...

A:

Q: A simple random sample of front-seat occupants involved in car crashes is obtained. Among 2868 occup...

A: Since you have asked multiple question, we will solve the first question for you. If you want any sp...

Q: Q3. A box contains six orange balls, four green balls, five yellow balls: 1- if a ball is drawn at r...

A:

Q: The joint probability distribution of two random variables X, Y is given in the table below. Y=-2 Y=...

A: For Y=2  Probabilities are given for every X, i.e. 0.04, 0.19, 0.05 So  P(Y=2)= 0.04+0.19+0.05= 0.28

Q: Suppose a hypertension trial is mounted and 18 participants are randomly assigned to one of three co...

A: