A study found that student weights averaged 87.3lb with a SD = 4lb.   What is the 2-decimal % probability that an individual student will weight below 85 lb?   What is the 2-decimal % probability that a group of 35 students will have a mean weight of over 88 lb?

Q: The lengths of pregnancies are normally distributed with a mean of 268 days and a standard deviation…

A: (a)   Obtain the probability that pregnancy will last 307 days or longer. The probability that…

Q: CNNBC recently reported that the mean annual cost of auto insurance is $962. Assume the standard…

A: Given information: The mean annual cost of auto insurance is $962. The standard deviation is $190.…

Q: In a negatively skewed distribution, the mean will generally be the median. O a. Less than O b.…

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Q: The p-value… is used to determine the Margin Of Error measures the number of standard deviations…

A: p value is a probabilty  which indicates the decision about null hypothesis assuming true  so that…

Q: Given the mean is 120 minutes and the standard deviation is 30 minutes. What is the probability that…

A: The mean is 120 minutes and standard deviation is 30 minutes.

Q: The owner of a computer repair shop has determined that their daily revenue has mean $7000 and…

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Q: A data set is formed by recording the sums in 400 rolls of a pair of a dice. A second data set is…

A: Standard deviation:The standard deviation indicates by how much each observation differs from a…

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Q: Would it be unusual for a data value to be more extreme than 4.76 standard deviations from the mean?…

A: In a normal distribution, data values that lie more than 4.76 standard deviations from the mean are…

Q: Most graduate schools of business require applicants for admission to take the GMAT exam. Suppose…

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Q: Michelle, a telemarketer makes six phone calls per hour and is able to make a sale on 30% of these…

A: The random variable X is making sales. The number of cars per hour is 6. The probability of making a…

Q: Is the following an observational study or an experiment? Take a random sample of people at a…

A: The given statement is  "take a random sample of people at a fitness center. Ask them if they use…

Q: 44%  of students in a class have black hair. If 66 students are chosen at random, what is the…

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Q: In a normal distribution, 11% of the items are under 35 and 76% are under 83. Find the mean and…

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Q: If the mean of a list of numbers is 16.7 and the standard deviation is 0,

A: Mean is a measure of central tendency. It is one of the most important measures to find out around…

Q: Cody took his first physics exam and scored an 80. The population mean for this exam is 70, and the…

A: Solution: It is given that, Population mean, 70 Standard deviation, 5 Given that Cody took his first…

Q: We want to estimate the mean of a population. A random sample of subjects is selected and the sample…

A: From the provided information, Standard error (SE) = 1.8

Q: 500 freshmen at Arundel University took part in a math comprehension test. The scores were normally…

A: From the provided information, Population size (N) = 500 Mean (µ) = 75 Standard deviation (σ) = 7…

Q: note population with a Normal distribution has an average of 50 and a variance of 100. How many…

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Q: The Survey of Study Habits and Attitudes (SSHA) is a psychological test that measures the…

A: PART A SOLUTION:Step 1: Determine What is AskedWe are given that the mean score for U.S. college…

Q: The daily rates of a sample of eight employee at POL Corp. are $550, $420, $560, $500, $700, $670,…

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Q: In 2009, it was estimated that 63% of Americans supported the death penalty. In 2014, a Rasmussen…

A: sample size(n)=943 No. of Americans supported the death penalty(x)=536 population proportion=0.63

Q: The estimated annual probability that a woman over the age of 32 dies of lung cancer equals 0.001204…

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Q: Full time Ph.D. students receive an average of $13,537 per year. If the average salaries are…

A: Introduction: Define X as the random variable of interest here, which denotes the salary of the…

Q: A certain video game has 72% chance of sucess. During summer vacation a person plays 12 games a day.…

A: In question, Given that A certain video game has 72% chance of sucess. During summer vacation a…

Q: 2. The level of cholesterol in the blood of Alaskan women aged 35 to 55 follows a Normal…

A: Given : The following information has been provided: μ=188, σ=41.5\mu = 188, \text{ } \sigma =…

Q: Marcos took the EnggMath3 exam decided to guess on a 10-item multiple choice. Each problem has 5…

A: # x be the no of answers correct follow binomial distribution (n=10, p=1/5)  1): then to find…

Q: Michelle, a telemarketer makes six phone calls per hour and is able to make a sale on 30% of these…

A: The question is about discrete probability distribution Given : No. phone call telemarketers makes…

Q: A manufacturer knows that their items have a normally distributed lifespan, with a mean of 7.2…

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Q: student scored in the 75th percentile on the SAT. What does that mean?

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Q: The owner of a computer repair shop has determined that their daily revenue has mean $7200 and…

A: The Z-score of a random variable X is defined as follows: Z = (X – µ)/σ. Here, µ and σ are the mean…

Q: A sample of 38 people are taken who who owns a red pair of shows. The std is 23 with an unlnown mean…

A: To determine the probability of making a type II error and the power, we need to know the level of…

Q: The lengths of lumber a machine cuts are normally distributed with a mean of 88 inches and a…

A: Given,Mean μ = 88Standard deviation σ = 0.6

Q: The body temperatures of adults are normally distributed with a mean of 98.6° F and a standard…

A: Z= x¯-μσn~N(0,1) n  = 36 , x¯ = 98.6 , μ = 98.6 , σ = 0.6