Fill in the blank. In a drive thru performance study, the average service time for McDonald's is 209.6 seconds with a standard deviation of 7.47 seconds. A random sample of 93 times is taken. There is a 5% chance that the average drive-thru service time is greater than ________ seconds.

Q: The mean value of land and buildings per acre from a sample of farms is $1500, with a standard…

A: The mean is 1500 and the standard deviation is 300.

Q: 42% of elderly people have high blood pressure. If a sample of 200 is taken and a success is…

A:

Q: Salaries for teachers in a particular elementary school district are normally distributed with a…

A: The properties of the normal distribution is,   The Normal distribution curve is and bell shaped…

Q: As the sample size             , the standard deviation of ?¯x¯             . increases; decreases…

A: The formula for sample standard deviation can be written as:

Q: Use the Empirical Rule. The mean speed of a sample of vehicles along a stretch of highway is 69…

A: Solution:The empirical rule for any normal distribution is given below.68% of the observations fall…

Q: Each year, tornadoes that touch down are recorded. The following table gives the number of tornadoes…

A: The given data as follows: 3,2,54,123,209,96,70,89,61,55,114,102 Thus,  The minimum value of the…

Q: Refer to the accompanying table, which describes the number of adults in groups of five who reported…

A: Given that ; X represents the number of adults in groups of five who reported sleepwalking P(x) is…

Q: a normal population has a mean of $92 and standard deviation of $11. You select random samples of…

A: Given information: Mean (µ)=92Standard deviation(σ)=11Sample size (n)=50 Find: PX¯-µ≤1.50 Formula: Z…

Q: Zombieland is one of SF's favourite movies. Tallahassee, a character, is obsessed with twinkies.…

A: Given thatYears Count 1-627-12313-18919-24625-30331-361We have to find the average and standard…

Q: 68.7% of the population have brown eyes. A convention has 6000 people in attendance. Find the…

A: Given that, P = 0.687, n = 6000 SD= ?

Q: A research firm conducted a survey to determine the average amount of money consistent smokers spend…

A: We have given that,  Let X be a random variable from normal distribution with mean(μ) = 20 and…

Q: The average daily points for my fantasy baseball team are {4.1, 5.7, 3.8, 4.7, 4.7, 5.5, 4.1, 2.7,…

A: Solution: Note: Hello! As you have posted more than 3 sub parts, we are answering the first 3…

Q: Each year, tornadoes that touch down are recorded. The following table gives the number of tornadoes…

A: Range: From the given values, the minimum value is 2 and the maximum value is 197 Range=maximum…

Q: Find their respective​ z-scores. Who had the more convincing​ victory? Ron   had a finish

A:

Q: Suppose phone bills have a mean of $78 and a standard deviation of $8. How much would a phone bill…

A:

Q: The annual commissilons per salesperson employed by a retailer of mobile communication devices…

A: Let X be the random variable from normal distribution with mean (μ) = $ 41200 ans standard deviation…

Q: The sample standard deviation for the cost is $

A: The sample standard deviation for the frequency distribution is, s=1n-1∑ifixi-x2 The sums are,…

Q: Four coins are tossed. Let Z be the random variable representing the number of heads that occur.…

A: Given: Four coins are tossed. The random variable Z denotes the number of heads that occurs.

Q: Allegiant Airlines charges a mean base fare of $89. In addition, the airline charges for making a…

A: Given that: Mean base fare = $89 Additional Charges = $35 Sample size,  n = 50 Population standard…

Q: The average travel time to work for a person living in Kokoma, Indiana, is 17  minutes.  Suppose the…

A: Solution: Let X be the average travel time to work for a person living in Kokoma  Indiana has normal…

Q: marketing analyst’s sample of six companies’ social media apps value were$25, $7, $22, $33, $18,…

A:

Q: There is an average of 4 accidents in a week on a major highway in the city. What is the standard…

A:

Q: In the question below, do 50 minutes imply the mean of the population or the mean of the sample?…

A: The derived numerical characteristic that explains the average (or mean) at the population level can…

Q: population has a mean of 91 and a standard deviation of 10. A sample of 25 observations will be…

A: μ = 91σ = 10n = 25P(87.56<x¯<96.3) = ?

Q: Zika is a serious and highly contagious virus. The Department of Health keeps records of all…

A: given data   test positive test negative total haszika 8.2% 0.7% 8.9% does not have zika 2.3%…

Q: A tire company finds the lifespan for one brand of its tires is normally distributed with a mean of…

A: Step 1:We have given that :Mean(μ)=46500 milesStandrad deviation(σ)=6000 milesThe probability of a…

Q: Provide an appropriate response. Assume that the salaries of elementary school teachers in the…

A: The objective of this question is to find the cutoff salary for teachers in the bottom 10% of a…

Q: Use a formula to find the standard deviation of the sample 1, 4, 5, 6.

A: We have given that,  The data set of the sample is,  1, 4, 5, 6 Then,  We will find the standard…

Q: A doctor is researching the effects of "too much text messaging" on a group of teenagers. He has…

A: It is given that the mean is 312 and standard deviation is 125.

Q: 2. Fill in the blanks: A standardized variable always has a mean of O and a standard deviation of…

A: 2. A standardized variable is always has mean 0 and standard deviation of 1.

Q: The mean life of a tire is 30,000 km. The standard deviation is 2000km. About 95% of all tires have…

A: According to the given information, we have Mean = 30000 km Standard deviation = 2000km

Q: Disability causes 48% of all mortgage foreclosures. Given that 20 mortgage foreclosures are audited…

A: Here's if we consider Binomial distribution then probability of success is 0.48 and number of trial…

Q: Salaries for teachers in a particular elementary school district are normally distributed with a…

A: Given information- Population mean, µ = $45,000 Population standard deviation, σ = $6,200 Sample…

Q: Neil scored 67 on his calculus class final and was devastated by his failing grade. His class…

A: Given information: The mean and standard deviation of Neil class are as follow: Mean (µ) = 54…

Q: Legs for a wooden dining room table are produced by a computer numerically controlled (CNC) Iathe.…

A: Suppose a random variable x, defines the lifetimes of cutting blade.

Q: Suppose that we know that 33.8% of the people born in the United States between 1936 and 1951 have…

A:

Q: According to BusinessWeek, 44% of advertisers claim they have been a victim of internet click fraud.…

A: The mean is, μ=np=120×0.44=52.8 The mean is 52.8. The standard deviation is,…

Q: Solve the problem. Assume that mountain lions' weights are normally distributed with a mean of 62.6…

A: We have given that,  X be the random variable from normal distribution with mean (μ) = 62.6 ,…

Q: Six different​ second-year medical students at Bellevue Hospital measured the blood pressure of the…

A: Given 126,138,132,138,124,122

Q: NCAA Scholarships. The NCAA estimates that the yearly value of a full athletic scholarship at…

A: GivenMean(μ)=19000standard deviation(σ)=2100

Q: n what range of money for their annual salary?

A: In this, the given values are: μ=54,600 σ =10,200 According to the empirical rule, for normal…

Q: 3; 8; -1; 1; 0; 4; -3; 2; -1; 5; 4; -2 what is the standard deviation for this sample?

A: Given, The 12 change scores are 3,8,-1,1,0,4,-3,2,-1,5,4,-2

Q: Which data set would give the smallest standard deviation? Select one: O a. 100, 150, 200, 250, 300}…

A: Without using any formula for the standard deviation, we can determine which of them has a smallest…

Q: A particular fruit's weights are normally distributed, with a mean of 641 grams and a standard…

A: Suppose a random variable x defines the weight of a randomly selected fruit.