A math teacher claims that she has developed a review course that increases the scores of students on the math portion of a college entrance exam. Based on data from the administrator of the exam, scores are normally distributed with u = 520. The teacher obtains a random sample of 2200 students, puts them through the review class, and finds that the mean math score of the 2200 students is 526 with a standard deviation of 114. Complete parts (a) through (d) below. ..... (a) State the null and alternative hypotheses. Ho: H 520 , H1: H 520 (b) Tost the bynothesis at the -0 10 level of significance Is a mean math score of 526 statistically sianificantly bigher than 5202 Conduct a

Q: In a recent year, the scores for the reading portion of a test were normally distributed, with a…

A: Mean is 20.4 and the standard deviation is 6.5.

Q: A marine biologist claims that the mean length of mature female pink seaperch is different in fall…

A: From the given information, Consider, X1=110,  X2=109s1=13,     s2=7n1=15,    n2 =8 Thus,

Q: Entrance exam scores at Cititon University are normally distributed with a mean of 558 and a…

A: Given: X = entrance exam scores X is Normally distributed Mean of X = 558 Standard deviation of X =…

Q: A math teacher claims that she has developed a review course that increases the scores of students…

A: Hypothesis testing is a way to test a claim about a population parameter.

Q: Es On their website, a property management company states that the mean monthly rent for apartments…

A: As per bartleby guideline expert have to answer first three subparts only dear student please upload…

Q: A researcher claims that the stomachs of blue crabs from Location A contain more fish than the…

A: Level of significant = 10%  Here we use the two sample mean t test to solve this problem.

Q: A math teacher claims that she has developed a review course that increases the scores of students…

A:

Q: On the recent SAT English test, the scores were normally distributed with a mean of 1000 and a…

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

Q: A math teacher claims that she has developed a review course that increases the scores of students…

A: As per our guidelines, we are allowed to answer first three sub-parts only. Thanks   Sample Mean…

Q: In a certain factory of rags, the time it takes for the workers to finish one rag is normally…

A: Hey there! Thank you for posting the question. Since your question has more than 3 parts, we are…

Q: A math teacher claims that she has developed a review course that increases the scores of students…

A: a.   Denote μ as the population mean math score.

Q: A researcher claims that the stomachs of blue crabs from Location A contain more fish than the…

A:

Q: A math teacher claims that she has developed a review course that increases the scores of students…

A: Solution

Q: A marine biologist claims that the mean length of mature female pink seaperch is different in fall…

A: Given: Fall Sample size (n1) = 12 Sample mean x¯1=123 Sample standard deviation (s1) = 14 Winter…

Q: A math teacher claims that she has developed a review course that increases the scores of students…

A: From the provided information, Sample size (n) = 1800 Sample mean (x̄) = 525 Standard deviation (s)…

Q: The 2018 Math Portion of the SAT score are normally distributed with a mean of 527 and a standard…

A: Empirical Rule: If a population has bell shaped distribution with mean µ and standard deviation σ ;…

Q: Subjects in a study by Dabonneville et al. (A-9) included a sample of 40 men who claimed to engage…

A: From the provided information, The hypotheses can be constructed as: H0: µ1 = µ2 H1: µ1 < µ2…

Q: A math teacher claims that she has developed a review course that increases the scores of students…

A: Given  alpha=0.10, n=400, Xbar=520, s=113

Q: A marine biologist claims that the mean length of mature female pink seaperch is different in fall…

A: we have given that  n1=12, xbar1=106 ,s1=15 and n10,xbar2=102 ,s2=11 alpha =0.01 Note : according to…

Q: An accountant claims that he can complete a .1 standard tax return in under an hour with a standard…

A: From the provided information, Sample size (n) = 4 Sample mean (x̅) = 64 minutes Population standard…

Q: Suppose that wedding costs in the Caribbean are normally distributed with a mean of $6000 and a…

A: Note: Hey as per our honor code i can answer only three sub parts. Thanx

Q: A boat capsized and sank in a lake. Based on an assumption of a mean weight of 143 lb, the boat was…

A: We have to find given probability.

Q: A math teacher claims that she has developed a review course that increases the scores of students…

A: For the given data Perform t test for one mean

Q: The average starting salary for graduates at a university is $33,000 with a standard deviation of…

A:

Q: A math teacher claims that she has developed a review course that increases the scores of students…

A: a) H0: μ = 514 , H1 > 514 ____________________________________

Q: A recent report indicates that 2-year-old children from well-educated suburban families watched an…

A: It is given that the mean is 60 and standard deviation is 25.

Q: A math teacher claims that she has developed a review course that increases the scores of students…

A:

Q: A college student is interested in investigating the claim that students who graduate with a…

A:

Q: Suppose that the distance of fly balls hit to the outfield (in baseball) is normally distributed…

A:

Q: math teacher claims that she has developed a review course that increases the scores of students on…

A: We have given that.  Sample size n =2000 Sample mean = 525 Sample standard deviation =111

Q: A math teacher claims that she has developed a review course that increases the scores of students…

A:

Q: The scores on the final exam in a statistics course are close to being normally distributed. The…

A: Normal distribution: It is a continuous probability distribution, that is bell-shaped with lighter…

Q: Based on research conducted by the government on people aged 25 to 34 years, on average, people in…

A:

Q: An instructor in a large lecture class found, at the end of the semester, that the total point…

A: Given information- Population mean, μ = 530 Population standard deviation, σ = 80 We have given…

Q: Family income in a particular suburb has been found to be approximately normal with a mean of…

A: The random variable family income follows normal distribution. The population mean is $52,137. The…

Q: Consider the company, which produces lightbulbs with a mean lifetime of 1,200 hours and a standard…

A:

Q: HA manufacturer of Energy Saving Lamps has a product life that is normally distributed with a…

A:

Q: The exam scores of 200 students are distributed normally with a mean of 72 and a standard deviation…

A: Total students = 200 Standard deviation = 10 And distribute mean = 72 We have to find the number of…

Q: A state school administrator says that the standard deviation Or SAI critical reading test scores is…

A: Given Population standard deviations σ=114, sample size n=19, sample standard deviations s=143…

Q: A math teacher claims that she has developed a review course that increases the scores of students…

A:

Q: A recent report indicates that 2-year-old children from the well-educated suburban families watched…

A: From the provided information, Mean (µ) = 60 minutes Standard deviation (σ) = 25 minutes Let X be a…

Q: A marine biologist claims that the mean length of mature female pink seaperch is different in fall…

A: Correct option: Option A

Q: average GPA of 2.78 with a standard deviation of 0.45.

A: Given that  GPA is normally distributed . A sample of university students has an average GPA of 2.78…

Q: A science teacher claims that the mean scores on a science assessment test for fourth grade boys and…

A:

Q: In a certain factory of rags, the time it takes for the workers to finish one rag is normally…

A:

Q: cian claims that the mean winning times for Boston Marathon women’s open division champions is at…

A: As the population standard deviation is known, we will use z distribution. The following null and…

Q: The consumer board’s alternative hypothesis is:

A: Here use basic of how to define null and alternate hypothesis

Q: Subjects in a study by Dabonneville et al. (A-9) included a sample of 40 men who claimed to engage…

A:

Q: A radio station claims that the amount of advertising per hour of broadcast time has an average of…

A: It is given that, A radio claims that the amount of advertising per hour of broadcast time has an…

Q: A math teacher claims that she has developed a review course that increases the scores of students…

A: Here  given for the math exam score Mean=μ=519 sample size=1800 sample mean =X¯=525 Sample sd=s=110