Suppose the age that children learn to walk is normally distributed with mean 12 months and standard deviation 1.5 month. 15 randomly selected people were asked what age they learned to walk. Round all answers to 4 decimal places where possible. a. What is the probability that one randomly selected person learned to walk when the person was between 11.5 and 12.5 months old? 2586 b. For the 15 people, find the probability that the average age that they learned to walk is between 11.5 and 12.5 months old. .8030 c. For part b, is the assumption that the distribution is normal necessary? © YesO No d. Find the IQR for the average first time walking age for groups of 15 people. Round to two decimal places. Q1 = months Q3 = months IQR: months

Q: Test the hypothesis using the P-value approach. Be sure to verify the requirements of the test. Ho: ...

A:

Q: Find the margin of error for the given values of​ c, σ​, and n.   c=0.90​, σ=2.3​, n=36   Level of C...

A: Given,c=0.90σ=2.3n=36

Q: A man is selling ribbon: when he sets the price at p (per meter) the demand for ribbon is x*(p) = 18...

A:

Q: SAT scores are distributed with a mean of 1,500 and a standard deviation of 300. You are interested ...

A: Given : Margin of error, ME = 25.0 population standard deviation, σ = 300.0 ...

Q: The coefficient of a contrast must sum to 1

A: Given statement :  The coefficient of a contrast must sum to 1    

Q: In a clinical trial, 18 out of 864 patients taking a prescription drug daily complained of flulike s...

A: Here we have to fill the boxes from given information

Q: Test the claim that o = 14.49 vs o < 14.49 if n = 12, s = 13.3, and a = 0.05. %3D Assume that the po...

A:

Q: Another statement in the NSFG was "Marriage has not worked out for most people I know." 36.2% of fem...

A: Given ; p̂1 = 0.362 p̂1 = 0.315 SE = 0.08

Q: Each year, over 2 million people in the United States become infected with bacteria that are resista...

A:

Q: 9. When birth weights were recorded for a simple random sample of 18 male babies born to mothers in ...

A: 9. The sample size is 18, sample mean is 3.857, and sample standard deviation is 0.664.

Q: (a) A sample of 12 drivers shows the time that they spent (in minutes) stopped in rush-hour traffic ...

A:   (a)   Use EXCEL Procedure for finding the value of standard deviation.   Follow the instruction to...

Q: A math teacher asks each student to create a password to gain access to her website. The password ha...

A: Introduction :-  Given :-  The password has 5 digits. The first digit must be a multiple of 1. The ...

Q: Which of the following is NOT a correct statement about a probability?

A: We know that  Probability =Number of favorable eventsTotal number of events The probability value ra...

Q: null hypothesis?

A:

Q: A random sample of 10 chocolate energy bars of a certain brand has, on average, 280 calories per bar...

A:

Q: A frequency table of grades has five classes (A, B, C, D, F) with frequencies of 2, 10, 18, 6, and 3...

A: Solution

Q: The following data represent the number of innings pitched by the ERA leaders for the past few years...

A:

Q: The increasing annual cost (including tuition, room, board, books and fees) to attend college ) to a...

A:

Q: A random sample of 5006 adults in a country includes 755 who do not use the Internet. Construct a 95...

A: Formula :     

Q: The distribution of head circumference for full term newborn female infants is approximately normal ...

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

Q: A population of N=6 has a EX^2 =54. What is the value of SS for this population

A: Ans:- Given, A population of N=6 has a EX^2 =54. What is the value of SS for this population  

Q: Pandemic-fueled challenges forced consumers to wait significantly longer in drive-thru lanes. QSR ma...

A: Given Data Population Mean,μ = 283.3 Population Standard Deviation,σ = 33

Q: Use the advertised prices for used cars of a particular model in the accompanying table to create a ...

A: Solution Residual is the difference between actual value and predicted value.

Q: 1 For a confidence level of 99% and n = 18, find the critical value to/2.n-1 with the table. (Use fo...

A: Note: As per my policy i can answer only one question. kindly repost the remaining questions. Given ...

Q: QUESTION 5 If you know that you have data that follows a normal distribution with a mean of 75 and s...

A: Given information- Population mean, µ = 75 Population standard deviation, σ = 17 Let, X be the rando...

Q: Determine the following probability.   Meeting at least one person with the flu in ten random encoun...

A: Answer: Given that:Infection rate is 3​% i.e. p= 0.03 , n= 10 now will use Binomial probability P...

Q: A college entrance exam company determined that a score of 20 on the mathematics portion of the exam...

A: Given : Claim : On average they scoring above 20 on the mathematics portion of the exam. 

Q: MOVIE STUDIO LENGTH (MIN) TOBACCO (SEC) ALCOHOL (SEC) Snow White Disney 83 0 0 Pinocchio Disney 88 2...

A: Given: n1 = 50 n2 = 50 Formula Used: Confidence Interval = X1-X2 ± t*×S×1n1+1n2 Where, S = (n1-1)S12...

Q: 3. The author of a blackjack strategy book claims that the dealer wins more than 67% of ll nands dea...

A: Solution-: Given: We test the claim that, the dealer wins more than 67% of all hands dealt.

Q: you are studying for your MTH201 Final Assessment and you overhear one of your classmates, Racheal, ...

A: Given data You over hear one of your classmates Racheal telling another classmate that ''There are a...

Q: (0) If the researcher decides to test this hypothesis at the a = 0.05 level of significance, will th...

A: E) The sample size n is 35.

Q: sample size would be required for the fraction nonconforming control chart if it is desired to have ...

A:

Q: Use the method of your choice to determine the following probability.   Purchasing 2winning lottery ...

A:

Q: According to previous studies, the mean distance each visitor in Greenspan National Park hikes durin...

A: The random variable distance follows normal distribution. The sample size is 45. The sample mean is ...

Q: tenured bus inspector claims that the difference between the variance of speeds of all city buses an...

A:

Q: Assuming a normal population distribution of X with population mean = 40 and population variance = 1...

A:

Q: One of the statements included in the National Survey of Family Growth (NSFG) was "A young couple sh...

A: Given : p̂1= 0.265 p̂2 = 0.239

Q: A large supermarket chain is interested in determining whether a difference exists between the mean ...

A: 1. The sample size for brand S is 50, sample mean is 4.1, sample standard deviation is 1.2, the samp...

Q: Use the values on the number line to find the sampling error.   An infinite number line, labeled fro...

A: Given data, x=4.5 μ=4.85 The sampling error =?

Q: able 1 gives the distribution of the number of accepta dministration. Test at the 5% level of signif...

A: Given, probability (p)  = .4 Observed frequency (O) : Let x be a random variable, X ~ (n = 3 , p =....

Q: In the least-squares line  = 5 – 9x, what is the value of the slope? When x changes by 1 unit, by h...

A: In the least-squares line  = 5 – 9x, what is the value of the slope?

Q: In a survey of 1200 college students living in the dorms, 600 said that they had only a tablet in th...

A: Solution  

Q: 4. In a pre-election poll, a candidate for district attorney receives 230 of 450 votes. Assuming tha...

A:

Q: The expected return on market portfolio is 8.50 per cent with a Standard deviation of 3. The RF is 5...

A:

Q: C.I 54 - 56 51 - 53 48 - 50 f 1 1 45 - 47 42 - 44 39 - 41 36 - 38 33 - 35 30 - 32 27 - 29 24 - 26 21...

A: Given information: Class interval Frequency 21 to 23 1 24 to 26  1 27 to 29 2 30 to 32 1 ...

Q: 11.37 Repair and replacement costs of water pipes. Refer to the IHS Journal of Hydraulic Engineering...

A: The regression equation is a mathematical equation representing the numerical relationship between t...

Q: To test Ho: u = 100 versus H,: µ# 100, a simple random sample size of n = 22 is obtained from a popu...

A:

Q: Click here to view page 1 of the standard normal distribution table. Click here to view page 2 of th...

A:

Q: Canadian Attitudes Toward Guns: A survey asked a random sample of 1,505 adult Canadians "Do you agre...

A: Solution

Q: 3. A random sample of 44 subjects who identified themselves as compulsive buyers was obtained and gi...

A: We have to perform the right tailed Z test for the mean.