a. The number of brownies sold by a bakery on a random day is a random variable with a mean value of 38 and a standard deviation of 6. What is the probability that the total number of brownies sold for a random sample of 56 days is less than 2070? Explain.

Q: It's proposed that the average life expectancy these days is 72.4, but recent data suggests it might…

A: sample size(n)=82 Mean(x)=74 standard deviation(s)=20.2 significance level(α)=0.10 The null and…

Q: 4. Use the Central Limit Theorem. Assume that women's heights are normally distributed with a mean…

A: (a) The probability that her height is less than 65 in is obtained below as follows: From the EXCEL…

Q: 2. Assume salaries of new college graduates in computer information systems (CIS) have a normal…

A: Note: Hi! Thank you for the question, As per the honor code, we are allowed to answer three…

Q: The weights of 4 randomly selected bags of potatoes labeled 20 pounds were found to be 20.5, 21.3,…

A: The data set are :- 20.5, 21.3, 20.8, 21.2 Then,  90% confidence interval?

Q: A laboratory tested twelve chicken eggs and found that the mean amount of cholesterol was 185…

A:

Q: 2. A box of 800 tickets contains 295 1's and 505 0's. One hundred draws will be made at random with…

A: The number of 1's tickets is 295 and 0's ticket is 505 from a box of 800 tickets.

Q: If n = 530 and p- hat confidence level = 0.65, find the margin of error at a 95%

A: Answer: From the given data, Sample size (n) = 530 Sample proportion (p^) = 0.65

Q: The given table shows a frequency distribution of the number of Galaxy Tabx sold per day at a…

A: Here given x = number of tablets Frequency = fi

Q: The probability that a person catches a cold during the cold and flu season is 0.4. If 10 persons…

A: We have given that- P(a person catches a cold during the cold and flu season) = 0.4 Sample size, n =…

Q: Which data would be most suitable for a pie chart? A. A corporation's sales revenue for the last 5…

A: According to measurement, statistics, data can be classified in two types, such as quantitative data…

Q: The following data give the percentage of women working in five companies in the retail and trade…

A: As per our guidelines I can solve only first 3 subparts. Kindly post the remaining subparts again…

Q: Hotel Managers' Personalities. Successful hotel managers must have personality characteristics often…

A: Answer: From the given data, Sample size (n) = 148 Sample mean (y¯) = 5.29 Population standard…

Q: Suppose that events E and F are independent with P(E)=0.65 and P(F)=0.72 What is P(E andF)? Round…

A: P(E)=0.65 P(F)=0.72 The events E and F are independent .

Q: In a study on the physical activity of young adults, pediatric researchers measured overall physical…

A: Mean(μ)=325 standard deviation(σ)=90 sample size(n)=100

Q: 4. Suppose the number of accidents per year in a large factory follows a Poisson distribution with A…

A: The no. of accidents per year in large factory follows a poisson distribution with  λ=5 per year

Q: Two identical racing cars are being tested on a circuit. For each car, the number of mechanical…

A: Two identical racing cars are being tested on a circuit. For each car, the number of mechanical…

Q: Several sets of test scores are all found to have the same mean. Would an individual who got the…

A: Here Given for several sets of test score. And each test has same mean. Score on every exam to be…

Q: 5 REM (rapid eye movement) sleep is sleep during which most dreams occur. Each night a person has…

A: As per the Bartleby guildlines we have solve first question and rest can be reposted.... We have to…

Q: Using specific data, we find a significant difference in the proportion of fruit flies surviving…

A: From the provided information, p^o=0.45p^c=0.43SE=0.029α=0.05

Q: Find the following ptobability. P(Z > 2.13) Round to 4 decimals

A: Answer: Using the given data, We have to find the probability that P(Z > 2.13) Z indicates…

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A: A confidence interval is a range of values in which the population parameter is expected to lie. The…

Q: Which of the following is NOT a conclusion of the Central Limit Theorem? Choose the correct answer…

A: Solution-: Which of the following is not a conclusion of the CLT? Choose the correct answer below:…

Q: a) Write an introduction: • Explain the problem in general (e.g., vitamin D deficiency and…

A: Vitamin D is an important nutrient that is essential for healthy bones and teeth, as well as a…

Q: USE SALT Calculate a 90% confidence interval for the mean airborne time for flights from San…

A: x x2 271 73441 255 65025 255 65025 267 71289 267 71289 285 81225 274 75076 275 75625…

Q: Find the mean and variance for the binomial distribution, P = 0.65, n = 12

A: Answer: From the given data, Sample size(n) = 12 p = 0.65 X follows binomial distribution (n,p)

Q: The mean daily production of a herd of cows is assumed to be normally distributed with a mean of 34…

A: Answer: From the given data, The mean daily production of a herd of cows is assumed to be normally…

Q: In the book Business Research Methods (5th ed.). Donald R. Cooper and C. William Emory discuss…

A:

Q: Maryland, as the four U.S. cities with the highest percentage of millionaires (Kiplinger website).…

A: The data is given below,     City       Bridgeport San Jose Washington Lexington Park…

Q: 14. Blood glucose levels for overweight patients have a mean of 120 with a standard deviation of 19.…

A: Population mean µ = 120 Population standard deviation σ = 19 Sample size n = 30 Sample mean x̅ =…

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A: Sample of size n=334 people with favourable number of people had flu x=31 Then the proportion of…

Q: A normal distribution is informally described as a probability distribution that is "bell-shaped"…

A: It is required to identify the correct graph having the bell-shaped characteristic of the normal…

Q: Calculate the mean and variance for the given data. 12,8,6,14,19 and 3.

A: Answer: From the given data, 12,8,6,14,19,3

Q: A binomial probability  experiment is conducted with the given parameters. Use technology to find…

A: Given that n=8 p=0.6 P(X<4)=?

Q: When H0 is true in a t test with significance level 0.05 the probability that the p-value falls <=…

A: When H0 is true in a t test with significance level 0.05 the probability that the p-value falls…

Q: The population mean will always be the same as the mean of all possible X that can be computed from…

A: As per guidelines I have calculated first question  Here comparing population Mean and mean of…

Q: 1. The EPA fuel economy estimates for automobile models tested recently predicted a mean of 24.8 mpg…

A: Mean=M=24.8, Standard deviation=S=6.2  Note: According to bartelby question answer guidelines an…

Q: Using the same question:    Find and interpret the probability that between 9 and 12 between of​…

A:

Q: A university discovers that its colleges don’t each requires a full-time Technical Support person.…

A: can use the Poisson distribution to model the number of colleges that require technical support on…

Q: A data set includes systolic blood pressure measurements from 147 adult females. If we compute the…

A:

Q: When Americans eat out at restaurants, most choose American food; however, tastes for Mexican, *…

A: 39% of families ate together 7 nights a week. 53% of families with kids ate fast food at least once…

Q: For a normal variable X~ N(μ = 70.7,o= 17.04), find 0.74, the value that divides the area u density…

A: A normal variable X follows normal distribution with parameters μ=70.7 and σ=17.04.

Q: Which graphs are best for showing central tendency and spread of data? Group of answer choices Stem…

A: Here ,  Four graphs are given :  Stem &amp; Leaf plot  : ( It is the diagram , in which data written…

Q: Suppose the data represent the inches of rainfall in April for a certain city over the course of 20…

A: 0.44,2.14,3.39,5.12,0.62,2.48,3.82,5.42,0.99,2.68,4.28,5.56,1.43,2.86,4.57,5.92,1.68,3.26,4.95,6.19…

Q: What is the sample mean for the given dataset 72,26,52,73,73,41,63,83,64

A: Answer: From the given data, 72,26,52,73,73,41,63,83,64 Sample size(n) = 9

Q: If probability of choosing a red chip from a bucket is 0.43, what is the probability of not choosing…

A: Answer: From the given data, Probability of choosing a red chip from a bucket is 0.43 P(Red chip…

Q: For a standard normal table or Excel function find the given probability, Calculate P(Z>0.63)

A: Answer: From the given data, P(z&gt;0.63) is,

Q: For the set of data, describe the shape of the distribution…

A: 28, 14, 22, 36, 55, 39, 46, 63, 46, 35, 53, 55, 67, 42

Q: Set up the null and alternative hypotheses for testing whether the true mean student-driver response…

A: Let μ be the mean response. Given that, Population mean (μ)=4.7Sample size (n) = 258Sample mean…

Q: Pet Place sells pet food and supplies including a popular bailed hay for horses. When the stock of…

A: X~N(mean μ=15, standard deviations σ=6) P(X&gt;20)=?

Q: 3. Control Charts for X and s are maintained on the resistance in ohms of an electrical part. The…

A: Given that, Subgroup size (g)=20∑i=1gX¯i=3046.5∑i=1gsi=47.4 To find the control limits for X¯-s…