(a) Approximately what percentage of these vehicle speeds were between 31 and 57 mph? approximately  % (b) Approximately what percentage of these vehicle speeds exceeded 57 mph? (Round your answer to the nearest whole number.) approximately  %

Q: The Welcher Adult Intelligence Test Scale is composed of a number of subtests. On one subtest, the…

A: Answer: Given that:   ‘x’ is Normally distributed with                 Mean  µ =40       standard…

Q: Assume the average price of a laptop computer is $750 with a standard deviation of $75. The…

A: Hey there! Thank you for posting the question. Since your question has more than 3 parts, we are…

Q: What is your conclusion about the correlation between rainfall that day and mean age of customers?

A: Given that, Dependent variable = sales per 24h in a department store Independent variables = the…

Q: For table 1, by describing the data shown in it, describe what the standard error in that table…

A: In table1, we are given the mean value of results for the three groups and their standard deviations…

Q: Read this sample from the report. “In March 2015, 61 percent of workers in private industry had…

A: All categories do not represent industries not surveyed in the report because data points will not…

Q: whose puilding values per acre are given, are unusual (more than two standard deviations from the…

A: X 1493 2089 1232 801 1590 1545 The data value that is less than $1200 is $801 and greater…

Q: A histogram is used to understand:

A: Histogram describes the frequency of the data using bars.

Q: b. In a class of twenty-five 15-year old girls the average height is M = 62.60 inches. The national…

A: Given: X=M=62.60 inches, μ=63.80 inches, s=2.66 inches The Cohen’s d effect size is calculated as…

Q: a) How much more cereal do you expect to be in the large bowl? b) What's the standard deviation of…

A: Let X is the random variable representing the small bowl and Y the random variable representing the…

Q: Suppose that you have a large dataset (from 10,000 family members) regarding visits to the zoo. The…

A: Option D. Mean is the correct answer

Q: To interpret his finding, he needs to calculate the probability that a sample of 25 graduates would…

A: Let X is the random variable of the salary of the school’s graduates one year after graduation.…

Q: 2. The original default rate on the sample of 135,000 cardholders was extremely high at…

A: Given:-           The original default rate on the sample of 135,000 cardholders was extremely high…

Q: 4. Distribution of heights of elderly English women is known to be normal with a mean height of 160…

A: As per Bartleby guideline expert have to answer first question three subpart only dear student…

Q: Whenever someone compares experimental values to data in published journals and researches, which…

A: Whenever someone compares experimental values to data in published journals and researches, which…

Q: n observational study of teams fishing for the red spiny lobster in a certain body of water was…

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

Q: In a study investigating the effect of car speed on accident severity, 5,000 reports of fatal…

A:

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

A: a. Suppose a random variable x defines the data speed of a particular smartphone at airport.

Q: The weights of adult men in a hypothetical population are approximately normally distributed about a…

A: GivenMean(μ)=175standard deviation(σ)=15

Q: Women are recommended to consume 1760 calories per day. You suspect that the average calorie intake…

A: Note : Since you have posted a question with multiple sub-parts, we will solve first three subparts…

Q: In a study investigating the effect of car speed on accident severity, 5,000 reports of fatal…

A:

Q: What was the range (best approximation) in which at least 75% of the data values fell?

A: in 1975 a sample of the hourly wages of employees who work in restaurants in Los Angeles has a mean…

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

A: The no. of considered airports, n=50. The highest measured data speed is 71.9 Mbps. For the…

Q: At a computer manufacturing company, the actual size of computer chips is normally distributed with…

A:

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

A: Answer:- Given data values are, 1488, 2394, 1242, 418, 1085, 1906Using formula, Unusual values are…

Q: For the data given below, fill in the blanks, using Formulas, Descriptive Statisties and Regression…

A: Note: Hey there! Thank you for the question. As you have posted multiple sub-parts, we have helped…

Q: When a researcher knows the population mean and standard deviation for the general (untreated) raw…

A: From the provided information, The researcher knows the population mean (µ) and standard deviation…

Q: The mean value of land and buildings per acre from a sample of farms is $1600, with a standard…

A:

Q: In a study investigating the effect of car speed on accident severity, 5,000 reports of fatal…

A: given dataN = 5000normal distributionμ = 45 mphσ = 14 mph

Q: Women are recommended to consume 1860 calories per day. You suspect that the average calorie intake…

A: (a) For the given study, we should use t-distribution Reason: Since the population standard…

Q: The scores on a psychology exam were normally distributed with a mean of 56 and a standard deviation…

A:

Q: a.   The average age of 12 jurors on a jury is 50 years.     b.   The standard deviation of…

A: Since you have posted a question with multiple sub-parts, we will solve first three sub-parts for…

Q: The mean length of a human pregnancy is 265 days, with a standard deviation of 14 days. Use the…

A:

Q: In a study investigating the effect of car speed on accident severity, 5,000 reports of fatal…

A:

Q: compare ihe altenuance al lNe res for a Saturday evening performance. He knows the mean and standard…

A: a) From the provided information, Goodman’s mean (µ1) = 383 Standard deviation (σ1) = 34 Attendance…

Q: (a) Approximately what percentage of these vehicle speeds were between 28 and 60 mph? approximately…

A: Given that  Mean=44 , Standard deviation=16 X~Normal(mean=44,Standard deviation=16)

Q: The mean value of land and buildings per acre from a sample of farms is $1600, with a standard…

A: Given Mean=1600 Standard deviations=300

Q: Tipping. In the article “Are Christian/Religious People Poor Tippers?” (Journal of Applied Social…

A:

Q: A. What is the 95% Cl of a population mean when the mean of a sample is 10, the standard deviation…

A: (a) The provided sample mean is X¯=10 and the sample standard deviation is s=2. The size of the…

Q: A sample of 250 employees of a company is selected, and the average age is found to be   35 years.…

A: Given information, A sample of 250 employees of a company is selected, and the average age is found…

Q: "he mean value of land and buildings per acre from a sample of farms is $1400, with a standard…

A:

Q: The average McDonald's restaurant generates $3.6 million in sales each year with a standard…

A: In this question given that survey of 27 restaurant Find out a null and alternative hypothesis…

Q: Consider the following data and answer the following questions. Monthly Sales (OMR): 25,000 30,000…

A: Given: Data on Monthly sales. The quartile is obtained from Excel using "=QUART(array, quart)".…

Q: e mean value of land and buildings per acre from a sample of farms is $1300, with a standard…

A:

Q: In a study investigating the effect of car speed on accident severity, 5,000 reports of fatal…

A:

Q: a study investigating the effect of car speed on accident severity, 5,000 reports of fatal…

A: The average speed is 42 with standard deviation 12mph. μ=42σ=12