The scores on a test are normally distributed with a mean of 90 and a standard deviation of 18. What is the score that is 2 standard deviations above the mean? A score of is 2 standard deviations above the mean.

Q: what is Type I error: what is Type II error:

A: here use basic of type 1 and type 2 error

Q: The test statistic of z= 1.96 is obtained when testing the claim that p > 0.43. This is a…

A:

Q: A report states the average temperature for the month of June on a specific tropical island is 98…

A: For the given data identify what type of test: right-tailed, left-tailed, or two-tailed.

Q: In your assignment, use the data "DPWH Major Projects". The data lists all major projects contracted…

A: 1) From the given information , the randomly selected 60 projects is displayed below.

Q: The pregnancy length in days for a population of new mothers can be approximated by a normal…

A: Given that,mean(µ) = 270 daysstandard deviation = σ = 9 days

Q: The hypothesis test ?0:?=23.6 H1:μ≠23.6 is to be carried out. A random sample is selected, and…

A:

Q: At LaGuardia Airport for a certain nightly flight, the probability that it will rain is 0.1 and the…

A:

Q: Find the variance and standard for the continuous random variables with density functions 2x for 0 ≤…

A: List of formulae : Variance : Var(x) = E(x2)-E(x)2 Where , E(X)=∫xxf(x)dx E(X2)=∫xx2f(x)dx Standard…

Q: Does the Public Support Sin Taxes? A survey of 1000 adults in the US conducted in March 2011 asked…

A:

Q: Manufacturer A's television picture tubes have a mean lifespan of 7.2 years and a standard deviation…

A:

Q: 8. A factory is supplied with grain at the beginning of each week. The weekly demand X, thousanfd…

A: A continuous function f(x) is said to be the probability density function of the continuous random…

Q: Class LB 28-30 27.5-30.5 31-33 30.5-33.5 34 - 36 33.5-36.5 37-39 36.5-39.5 40 42 39.5-42.5 43-45…

A: (19)  We have given that,  Class LB frequency CF 28 - 30 27.5 - 30.5 8 8 31 - 33 30.5 - 33.5…

Q: You estimated a regression with the following output.         Source |       SS           df…

A: The regression equation for one independent variable is,

Q: If E[X] = −3 and Var(X) = 5, then E[(5 + 6X)²] = and Var(3 + 5X) =

A:

Q: Consider random samples of size 100 drawn from population A with proportion 0.24 and random samples…

A: Solution-: Given: n1=100,p1^=0.24,n2=50,p2^=43 We want to find the standard error of the…

Q: You estimated the following regression. What value would you predict for Y, if X = 63?

A: From given output,  Y-intercept a = 70.28535 And slope b = 11.56109

Q: give an example that exhibit the golden ratio. Indicate in the measurements that gives the golden…

A: Value of golden ratio = approx 1.618

Q: The following data sets represent simple random samples from a population whose mean is 100.…

A: For data set I Mean = ?

Q: Assume a significance level of a = 0.05 and use the given information to complete parts (a) and (b)…

A:

Q: The systolic blood pressure of adults in the USA is nearly normally distributed with a mean of 119…

A: Given: The systolic blood pressure of adults in the USA is nearly normally distributed with a mean…

Q: It takes an average of 14.5 minutes for blood to begin clotting after an injury. An EMT wants to see…

A:

Q: Historical data show that customers who download music from a popular Web service spend…

A: Given that, μ=23σ=4 The probability that a customer will spend at least ​$19 per​ month is,

Q: 1. The height of male giraffes follows a normal distribution with μ = 18 feet and o = 0.9 feet². (a)…

A:

Q: A used car dealer says that the mean price of a three-year-old sports utility vehicle is $19,000.…

A: Solution

Q: The data shown below represent the age (in weeks) at which babies first crawl, based on a survey of…

A: Solution: Let X be the age. The given data for X is 52, 30, 44, 35, 47, 37, 56, 26, 30, 37, 26 and…

Q: 7. A charity group raises funds by collecting waste paper. A skip-full will contain an amount, X of…

A: Given,f(x)=c(x-1)4-xfor 1<X<40otherwise

Q: Manufacturer A's television picture tubes have a mean lifespan of 7.27 years and a standard…

A:

Q: he following codes to enter the following symbols:

A: Given Claim:- At least 90% of people support stricter gun laws.

Q: Determine P(Z < 1.8). Use 6 decimal places in your final answer. Sample answer: 0.123456

A: Solution

Q: 3. Manufacturer A's television picture tubes have a mean lifespan of 7.2 years and a standard…

A: Solution-: Population A: μ1=7.2,σ1=0.54,n1=39 Population B: μ2=6.21,σ2=0.54,n2=43 We want to find,…

Q: The goal of a research study is to provide an accurate picture of the status or characteristics of a…

A: We have given the following.

Q: 19. Solve for Percentile 40. Class LB 28-30 27.5-30.5 31-33 30.5-33.5 34-36 33.5-36.5 37-39…

A: (19) We have given that,  Class  LB frequency CF 28 - 30 27.5 - 30.5 8 8 31 - 33 30.5 - 33.5…

Q: 7.S.21 A student recorded the number of calories in each of 56 entrees-28 vegetarian and 28…

A: The 95% confidence interval interprets that there is 95% confidence that the difference of the…

Q: Question 9 Estimating Sample Size: You want to obtain a sample to estimate a population proportion.…

A:

Q: At LaGuardia Airport for a certain nightly flight, the probability that it will rain is 0.07 and the…

A:

Q: 13. What is the class interval of the data below? Class Frequency 28-30 8 31-33 8 34-36 7 37-39 5…

A: 1) Class Interval While arranging a largeamount of data in statistics, they are groupedinto…

Q: Approximate the probability P(X<7) by the fact that the random variable o/√n can be approximated to…

A: Given population units are 3, 6, 9, 12, 15.

Q: The exercise hours dataset contains information on the amount of exercise (hours per week) for a…

A:

Q: (b) Construct and interpret a 99% confidence interval for the mean tax paid for a three-day business…

A: Given data is 68.34 , 79.45, 67.37, 83.85 , 80.81, 86.65 , 101.78, 98.22sample size(n)=8

Q: Show complete solution with conclusion with the normal curve. 1. XYZ University claims that the…

A:

Q: A geneticist conducts an experiment with beans, one sample of offspring consisted of 455 green beans…

A: Solution-; Given: Number of green beans =455           Number of yellow beans =141           Total…

Q: 20.  You estimated the following regression. What value would you predict for Y, if X = 78? (Round…

A:

Q: If a researcher is interested in cause-and-effect relationships, which nonexperimental design should…

A: Cause and effect relationship is a kind of relationship in which one phenomenon is the reason behind…

Q: According to Johns Hopkins Medicine, the healthcare providers consider a fever to be 100.4◦F. Data…

A:

Q: (d) Manufacturer A's television picture tubes have a mean lifespan of 7.18 years and a standard…

A:

Q: X= 47.627 n = 40 x=471222075 Find the 95% confidence interval 9 mean along with popolation the mean…

A: Solution: From the given information,

Q: In determining automobile mileage​ ratings, it was found that the mpg​ (X) for a certain model is…

A: We have given that  Mean = 40 Standard deviation =1.8

Q: 31% of car crashes occur within 2 miles of the motorists home. Express the null and alternative…

A:

Q: You estimated the following regression. What value would you predict for Y, if X = 74? (Round your…

A: From the given information, the intercept value (b0) is 123.6065.

Q: Redistricting and House Elections The 2010 census led to the loss of two house seats in New York and…

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