Use a normal approximation to find the probability of the indicated number of voters. In this case, assume that 140 eligible voters aged 18-24 are randomly selected. Suppose a previous study showed that among eligible voters aged 18-24, 22% of them voted. Probability that exactly 33 voted The probability that exactly 33 of 140 eligible voters voted is (Round to four decimal places as needed.)

Q: A manufacturer knows that their items have a lengths that are approximately normally distributed,…

A: given data  normal distribution μ = 19.4σ = 4.8n = 32P(x¯>17.9) = ?

Q: Use Table V in Appendix A to determine the t-percentile that is required to construct each of the…

A:

Q: The number of wins in a season for 32 randomly selected professional football teams are listed…

A: Given data is9,9,9,8,10,9,7,2,11,10,6,4,11,9,8,8,12,10,7,5,12,6,4,3,12,9,9,7,10,7,7,5sample…

Q: 1.3.1. Ten years ago the average African drank 2.5 cups of coffee per day. You suspect that amount…

A: Solution 1.3.1 - Given that , Let u denote the average African drank that is u=2.5 cup of coffee per…

Q: An ROTC officer wanted to measure how many pushups his cadets are able to do in 1 minute in order to…

A:

Q: A AC Total B 0.443 0.005 0.528 BC 0.224 0.24 0.427 Total 0.667 0.333 1

A: From the cross-tabulation table, we have P( A ) = 0.667 P( B ) = 0.528 P( Ac and B ) = P( B ) - P( A…

Q: The ages of a group of  153 randomly selected adult females have a standard deviation of  16.3…

A: The population standard deviation is 16.3, and confidence level is 90%.

Q: b) A bag contains 10 cards, of which 2 are marked two, 1 is marked three, 4 are marked four and 3…

A: b) Given that Number of cards with number 2 is 2. Number of cards with number 3 is 1. Number of…

Q: Engineers must consider the breadths of male heads when designing helmets. The company researchers…

A: The mean is 5.8 and standard deviation is 1.2.

Q: To help students improve their reading, a school district decides to implement a reading program. It…

A: The mean is 121.2 and standard deviation is 23.

Q: You roll a fair die six times. What is the probability that you roll all 5's? A) 1 B) 0.167 C) 1.2…

A: Given -Roll a fair die six times -probability that you roll 5's=?

Q: For this experiment Consider a Grade School Class that has 23 males and 31 females. And we are going…

A: It is given that  Male = 23 Female = 31

Q: When randomly selecting a card from a deck with replacement, are we equally likely to select a…

A: In a standard deck the card are of type: 1 heart 2 Diamond 3 spade 4 club If a card is…

Q: A genetic experiment with peas resulted in one sample of offspring that consisted of 435 green peas…

A: It is given that 435 green peas and 157 yellow peas.

Q: If reserachers report from thier study were significant, P<.0.5 this means 1 we would expect the…

A: If : P&lt;0.05  Than we have to choose correct option :

Q: Assume that adults have IQ scores that are normally distributed with a mean of 101.7 and a standard…

A: GivenMean(μ)=101.7standard deviation(σ)=16.8

Q: Find the area under the standard normal distribution curve to the right of  =z 2.77

A: The given z-score is 2.77.

Q: Find the probability using the normal distribution:  P(−2.29<z<0)

A: standard normal distribution Z~N(0,1) μ= 0σ = 1 P(-2.29&lt;Z&lt;0) = ?

Q: K A food safety guideline is that the mercury in fish should be below 1 part per million (ppm).…

A:

Q: Costs are rising for all kinds of medical care. The mean monthly rent at assisted living facilities…

A: Given that  Sample size n =120 Sample mean=3486 Using estimated standard deviation

Q: 4.34 Let X be a random variable with the following probability distribution: X f(x) -2 0.3 Find the…

A: E(X)=∑x.P(X)E(X2)=∑x2.P(X)Variance(σ2)=E(X2)-(E(X))2Standard deviation(σ)=E(X2)-(E(X))2

Q: There are 11 chairs in a row. In how many ways can Joy, Jaymee, Josie, Joan, and Jenny be seated? O…

A:

Q: Which has a higher probability • Selecting 8 Males and 7 Females . • Selecting 7 Males and 8 Females…

A:

Q: An employee at Coconino Community College (CCC) is evaluated based on goal setting and…

A: Data is given for weight according to rating We have to calculate weighted average score

Q: You are interested in finding a 90% confidence interval for the mean number of visits for physical…

A: Given data : 18,20,21,6,24,22,221,11,10,17 N=10 Df = n-1 = 9 Mean = (18+20+...17)/10 = 17

Q: 3. Consider a Exponential Distribution with parameter of 0.0025 i.e. Exp(0.0025) B. Compute the…

A: Given  X~exp(parameter=0.0025)

Q: The following table shows the Excel output of a multiple regression on the 1st week box office of…

A: Multiple regression usable to check the effect of different variables on a response variable. i.e.,…

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A:

Q: K yan processed tablet form. Cholesterol levels were measured before and after the treatment. The…

A: Given that  Sample size n =49 Sample mean=3.5 Standard deviation =18.6

Q: At most 30% of people support the death penalty. Express the null and alternative hypotheses in…

A: Given : Claim : At most 30% of people support the death penalty.

Q: Find two  z  values so that  62%  of the middle area is bounded by them

A: Given that  We have to  find two z values so that 62%  of the middle area is bounded by them

Q: Reminder: If you have a Poisson Distribution with Parameter then its Probability Density Function is…

A: Given,A random variable X~Poisson(λ=1)P(X=x)=e-1(1)xx!   ;   x≥0

Q: In a recent poll, the Gallup Organization found that 45% of adult Americans believe that the overall…

A: given data,adults americans believe that the overall state of moral values in United states is poor…

Q: Here are the foot lengths (in centimeters) for a random sample of 7 fourteen-year-olds from the…

A: Here, data is 25,22,20,25,24,24,28.

Q: Hannah and Claire each have a chicken coop with 6 hens. Let H represent the total number of eggs the…

A: Given that: Number of eggs 0 1 2 3 4 5 6 P(H) 0.02 0.03 0.07 0.12 0.30 0.28 0.18 P(C) 0.05…

Q: Section 9.2 # 68abc Weight loss: A doctor has developed a new diet to help people lose weight. A…

A: We have given the following  information.  Random sample = 500 Mean = 0.5 Standard deviation = 5

Q: Read the critical z value from the normal distribution table and choose the correct answer. For a…

A: Level of significance a=0.0802

Q: A statistical program is recommended. A highway department is studying the relationship between…

A: It is given that random variable x be the vehicle speed in miles per hour, and variable y be the…

Q: According to flightstats.com, American Airlines flights from Dallas to Chicago are on time 80% of…

A: The question is about discrete prob. distribution Given : Prop. of the times flights are on time ( p…

Q: How many parts should be sampled in order to estimate the population mean to within ±0.1 millimeter…

A: Given, margin of error is 0.1 and standard deviation is 1.8. We will use margin of error to find…

Q: You complete a runs test on daily data for a thinly traded stock and the Z statistic is 4.55.  If…

A: From the given information, The Z statistic for the runs test on daily data is Z=4.55. Null…

Q: According to the Federal Communications Commission, 70% of all U.S. households are using video…

A: Given,n=15p=0.7q=1-0.7=0.3A random variable X~Binomial(n=15 , p=0.7)P(X=x)=Cx(0.7)x(0.3)15-x       ;…

Q: How many ways can 2 balls of different color be selected from 6 blue balls, 5 green balls, and 4 red…

A: There are 6 blue balls, 5 green balls and 4 red balls.

Q: Question 3 The production manager at Programmable Products wants you to test whether there is a…

A: Given Information: 6am-2pm shift 2pm-10pm shift 11pm-6am shift 15 18 9 20 21 29 18 22 35…

Q: When a sample size is > an integer. , we can treat s as a and assume the population standard…

A: Given notation  s=sample standard deviations σ=population standard deviations

Q: Suppose a certain retailer sells several models of refrigerators. A random sample of the models sold…

A: We want to establish a linear regression model between the variables cubic feet (x) and list price…

Q: BIG Corporation advertises that its light bulbs have a mean lifetime, u, of 3000 hours. Suppose we…

A: It is given that μ is different from 3000 hours.

Q: Fast-Food Bills for Drive-Thru Customers A random sample of 40 cars in the drive-thru of a popular…

A: GivenMean(x)=16.68standard deviation(σ)=4.89sample size(n)=40confidence level=98%

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

A: Given, mean is 39.5 and standard deviation is 9.1. Sample is 625. We will use one sample z…

Q: Question 2 The below output shows the results of an ARIMA model which was fitted to a time-series…

A: Given GDP (in trillions of dollars) data: