A preliminary sample of holiday shoppers revealed that the standard deviation of the amount of money they are planning to spend on gifts during the coming holiday season is $82. How many holiday shoppers should be sampled in order to estimate the average amount of money spent on gifts by all holiday shoppers with a margin error of $7 and with a 95% confidence? O a. 353 O b.824 Oc. C 527

Q: Researchers measured the data speeds for a particular smartphone carrier at 50 airports. The highest…

A:

Q: A) What percent of car sales amounts are between $11,700 and $18,900? B) 99.7% of all people paid…

A: For a normal distribution with mean μ and standard deviation σ, we have: P(x<=a) =…

Q: Allegiant Airlines charges a mean base fare of $84. In addition, the airline charges for making a…

A: Given Information- Mean base fare = $84 Additional charges average = $37 Sample size, n = 80…

Q: O B. The number of babies that were born C. The number of births per capita D. The weights of the…

A:

Q: In order to estimate the average time spent per student on the computer terminals at a local…

A: sample size(n) = 81population standard deviation = 1.5 hoursstandard error for mean = ?

Q: The scores on an aptitude test are normally distributed with a mean of 18 and standard deviation of…

A: Note: Hey, since there are multiple subparts are posted, we will answer first three subparts for…

Q: Allegiant Airlines charges a mean base fare of $86. In addition, the airline charges for making a…

A: Total cost = $86 + $36= $122 Hence, μ=122σ=40 a.  The population mean cost per flight is $122…

Q: Of the 500 people who took the civil servant acceptance test in one government agency, the average…

A: We have given that  Mean=67.5 Standard deviation=5.2  Find A) P(55.6<x<61)B) P(x>65)

Q: A highway study of 8000 vehicles that passed by a checkpoint found that their speeds were normally…

A: Answer - A highway study of  N = 8000 vehicles that passed by a checkpoint found that their…

Q: Data was collected on the number of television sets in a household, and it was found that the mean…

A: It is an important part of statistics. It is widely used.

Q: The City Transport and Traffic Management Office (CTTMO) study of 8000 vehicles that passed the…

A: Given,The CTTMO study of 8000 vehicles that passed the diversion highway foundMean (μ) = 61 mphand…

Q: The mean number of travel days per year for salespeople employed by three hardware distributors…

A: Sample size: Sample is the part of the population that will help us to draw the inference about the…

Q: A recent survey of 8 social networking sites has a mean of 13.1 million visitors for a specific…

A:

Q: In a random sample of 50 adults, the mean body mass index (BMI) was 27.7 and the standard deviation…

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Q: On average 16 customers are served per hour in a bank serving point. What is the mean and standard…

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Q: The Acme Company manufactures widgets. The distribution of widget weights is bell-shaped. The widget…

A: Empirical rule: If a population has bell-shaped distribution with mean µ and standard deviation σ ;…

Q: An auditor, examining a total of 830 accounts receivable of a corporation, took a random sample of…

A: We have to find population mean ...

Q: Data were collected on the amount spent by 64 customers for lunch at a major Houston restaurant.…

A: As per our guidelines we are supposed to answer only three subparts kindly post the remaining…

Q: The average baggage-related revenue per passenger is: $  (please round to the nearest cent) b) The…

A: An airline charges the following baggage fees: $20 for the first bag and $35 for the second. Suppose…

Q: The standard deviation is closest to: A. 7.92kg  B. 8.63kg   C.8.04kg   D.9.21kg

A: Given that Frequency distribution table in a question

Q: A. What proportion of people would score below 88 on the memory test? B. What is the percentile rank…

A: Given : Mean=100 Standard deviation =10   Note :As per guidelines only first 3 subparts have been…

Q: Allan, a Grade 12 senior high school student, wants to estimate the average number of students who…

A:

Q: The A.C Nielsen company reports that about 85.5% of U.S households have a color T.V. Find the mean…

A: The mean number of households have a color T.V is, μ=np=6×0.855=5.13 Thus, the mean mean number of…

Q: Which data set would you expect to have the highest standard deviation? Why? Heights (lengths) of…

A: 7. Answer: The b) Heights of all elementary school children have the highest standard deviation.

Q: Internet providers: In a survey of 683 homeowners with high-speed Internet, the average monthly cost…

A: Solution: Let X be the plan cost. From the given information, X follows normal distribution with…

Q: An airline charges the following baggage fees: $25 for the first bag and $40 for the second. Suppose…

A:

Q: Toby's Trucking Company determined that on an annual basis, the distance traveled per truck is…

A: It is given that the mean and standard deviation are 50,000 and 12,000.

Q: Create a Histogram B. What is the sample mean of the data C. What is the sample standard deviation…

A: Part a The Histogram is obtained through excel as: Open the excel sheet and enter the data.

Q: An appropriate statistical tool for accounting for sampling error in an estimate is   A. A scatter…

A:

Estimation

A new framework of data analysis where the new statistical methods are used for interpreting the results and analyzing the data is known as estimation in statistics.