QUESTION 4 The reading speed of second grade students is approximately normal, with a mean of 88 words per minute (wprm) and a standard deviation of 10.31 wpm. Suppose a sample of 41 second grade students is selected from the populatión of students. (a) Find the standard error of the sampling distribution. Round your answer to 4 decimal places. (b) What is the probability that a random sample of 41 second grade students has a mean reading speed of at most 84.22 wpm? Round your answer to 4 decimal places. (c) What is the probability that in a random sample of 41 second grade students, the mean reading speed is more than 87.67 wpm? Round your answer to 4 decimal places.

Q: Question 4 According to a college survey, 67% of all students work full time. Find the standard…

A: As per our guidelines, we can solve only the first question. Kindly, repost the other for an answer.

Q: Question 3: A random sample of 55 observations produced a mean value of 28 and a standard deviation…

A: Given  mean=x̄=28, n=55, s=1.3

Q: QUESTION 15 The standard error of the mean 1 Is never larger than the standard deviation of the…

A: Formula for standard error: Standard error=Population standard deviationsample size That is, the…

Q: QUESTION 2 The population of computer parts has the size of 547. The proportion of defective parts…

A: The proportion of defective parts in population is 0.34; p=0.34 Sample size is 231; n=231

Q: Question 26: resting body temperatures are normally distributed with an average of 98.25 degrees…

A: Let X denote the resting body temperatures are normally distributed with an average of μ=98.25…

Q: Question 1. (HEALTH IS WEALTH) A health conscious squirrel joined a gymnasium to run a treadmill in…

A:

Q: Question 8.1.25-T Assigned Media v The shape of the distribution of the time required to get an oil…

A: Let, X: The time required to get an oil change at a 20 minutes oil change facility. The shape of the…

Q: Suppose that when a Honda dealership sells a Honda Accord, the profit the dealership makes is…

A: Given , Mean = 1200 , Sigma = 350 X ~ N(0,1)

Q: QUESTION 2 The IQ test has a mean of 100 and a standard deviation of 15. Suppose a simple random…

A: The standard error can be calculated as: SE=σn Here, σ = Standard deviation n = Sample size

Q: QUESTION 21 The lifetime of a new battery used in a digital clock has a mean of 300 days and a…

A:

Q: A random sample of 8 adults aged 30 years were asked how much they spent on medical costs in the…

A: 43 Use EXCEL Procedure to obtain the value of sample mean. Follow the instruction to obtain the…

Q: Question 4 [25] The amount of time devoted to preparing for a statistics examination by students is…

A:

Q: QUESTION 7 Nabisco claims that Chip Ahoy Cookies have an x=28.67 per cookie with a SD=2.67. Assuming…

A: As per bartleby guideline expert have to answer first question only..

Q: The amount of time that people spend at Grover Hot Springs is normally distributed with a mean of 71…

A:

Q: QUESTION 3 If a random sample of size 15 is drawn from a normally distributed population with mean…

A: Given : X follows t distribution.

Q: QUESTION 15 A certain machine makes electrical resistors having a mean resistance of 50 ohms and a…

A:

Q: Question 4 (a) At a certain community college, the time that is required by candidates to complete…

A: We want to find the probability  A) P(56<x<60) Note: According to bartleby experts question…

Q: uestion 7.6. A sample of 105 sanitation workers for the city of Euonymus, Texas, earns an average of…

A: Given Information: Sample size n=105 Sample mean x¯=24,375 Hypothesized value of population mean…

Q: According to Neilson & Co adults watch an average of 30 hours of a TV a week. Assume the population…

A: Given : μ = 30 , σ= 12 and n= 30 By Central Limit Theorem, x̅ follows a Normal distribution with…

Q: Question 8 Suppose that a random sample of size 64 is to be selected from a population with mean 40…

A:

Q: Question 13: The length of human pregnancies from conception to birth approximates a normal…

A: As per guideline expert have to answer first question only.

Q: QUESTION 19 The amounts of times that adults sleep are normally distributed with a mean of 6.8 hours…

A:

Q: QUESTION 20 Suppose the 90% confidence interval for the mean SAT scores of applicants at a business…

A: We have given that,  90% confidence interval = (1685, 1825) and sample size (n) = 16 Then,  We will…

Q: Question 7 If the heights of women are normally distributed with a mean of 64 inches and a standard…

A:

Q: Question 4 A college placement office conducted a survey of 100 engineers who had graduated from…

A: We have to find probability using z table.

Q: The performance on a nationally standardized aptitude test in a certain professional field is…

A: Given data, Mean=500 sd=100

Q: The salaries at a corporation are normally distributed with an average salary of $19,000 and a…

A: Solution: Let X be the salary at a corporation. From the given information, X follows normal…

Q: QUESTION 3 The distribution of the number of hours of sleep people get per night is unimodal and…

A: Provided information is, The distribution of the number of hours of sleep people get per night is…

Q: Question 5: If birth weights in a population are normally distributed with a mean of 109 oz and a…

A: X has normal distributed. X~N(μ,σ) μ=109 oz and σ=13 oz

Q: QUESTION 4 An astronomer wants to measure the distance from his observatory to a distant star.…

A: Given, mean = 10, sd = 2 , e = 0.5

Q: Question 1 A barometer is used to measure average daily atmospheric pressure. The daily pressure is…

A: Given that,  X~N(mu=1012hPa, sigma=12hPa)  We have to find P(X>1030 hPa) and P(1002…

Q: QUESTION 5 A manufacturer of a lightbulb claimed that its lightbulbs have a mean lifetime of 700…

A: GivenMean(μ)=700standard deviation(σ)=120sample size(n)=144

Q: Question 5. (CHILDHOOD NEVER COMES BACK) Bubba bought a bubble blower machine which produced 3125…

A: “Since you have asked multiple questions, we will solve the first question for you. If you want any…

Q: QUESTION 6 Suppose the country club bills based on a sample of 4 members are: 387, 1,018, 679, 926.…

A: Sample standard deviation is given by,

Q: QUESTION 4 estimate the mean of a normal population whose standard deviation is 31, with a margin of…

A:

Q: Question 5 The heights of the 430 Candidates for the Elite Military Unit have an approximate…

A: Formula of z score is , z = x-μσ Z score is the standard normal variable with mean μ = 0 and…

Q: QUESTION 14 The line width for a semiconductor manufacturing is assumed to be normally distributed…

A: Answer:-  Let, X be the random variable follows N(9,2.1).

Q: QUESTION 3 The national IQ test has a mean of 100 and a standard deviation of 15. Suppose a simple…

A:

Q: Question 3: The Scores on the Graduation project examination are normally distributed with a mean of…

A: We have given that,  X be the random variable from normal distribution with mean (μ) = 527 and…

Q: Question 22 An article reports that its author used a 25-item test (with dichotomous scoring for…

A: Reliability is used to measure the overall consistency of the measure or how extend a material or…

Q: The mean measure of high density lipoprotein (HDL), or good cholesterol, is 54 with a standard…

A: It is given that the mean is 54, the standard deviation is 17 and the sample size is 32.

Q: QUESTION 6 A research worker wants to determine the average time it takes a mechanic to rotate the…

A: Obtain the large sample size. The sample size is obtained below as follows:   The formula of sample…

Q: Question 19: The range of a battery of a newly produced  Electric vehicle is normally distributed…

A:

Q: QUESTION 9 The length of an adult Great White Shark is normally distributed with a mean of 3.4…

A: We have given that.   X~N( μ , ?^2 )   μ =3.4 , ? =0.5   Z-score =( x - μ )/?

Q: Question 6 A business analyst is investigating whether the mean amount of purchases made by…

A: Identify the correct option for the given study.   The correct option is identified below as…

Q: QUESTION 17 When engaging in weight-control (fitness/fat burning) types of exercise, a person is…

A: Solution

Q: According to ongoing clinical research into feline health, the weight of an obese adult male…

A:

Q: QUESTION 5. The English department at Arizona State University measured the vocabularies of its…

A: Given that The English department at Arizona State University measured the vocabularies of its…

Q: ) What is the probability that a single student randomly chosen from all those taking the test…

A: here AS PER GUIDELINES I HAVE CALCULATED FIRST MAIN QUESTION  The scores of students on the SAT…

Q: Question 15: In a survey, 12 people were asked how much they spent on their child's last birthday…

A: Given,sample size(n)=12sample mean(x¯)=44standard deviation(s)=5degrees of…

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.