Statistics project Accuplacer scores-total number in sample 425 sample mean 38.1 and sample standard deviation of 14.6                   1. What distribution and critical value should you use to calculate margin of error? 2. Perform a hypothisis test to determine if there is sufficent evidence to support the claim that the population mean score of 40 is incorrect, at a 0.1 level of significance.  Is the critical value -1.645 or -+1.645

Q: Music streaming services are the most popular way to listen to music. Data gathered over the last 12…

A: We have given that  Sample sizes n1=13      , n2=12        Sample means X̄1= 1.76      , X̄2= 2.27…

Q: utsourcing Company and Technica Global Services has better ustomer service, an independent survey…

A:

Q: Which statistic is more resistant to outliers (extreme data values)? O Standard Deviation O…

A: Given problem Given that   Which statistic is more resistant to outliers ? Ans) Standard Deviation…

Q: An energy company wants to choose between two regions in a state to install energy-producing wind…

A:

Q: The quality-control manager at a compact fluorescent light bulb (CFL) factory needs to determine…

A: Answer:- Given, population standard deviation, σ = 980 hours .  Sample size, n = 49  Sample mean ,…

Q: a. A financial company is running a training program where participants learn how to conduct a fast…

A: Question based on natural tolerance

Q: you are expected to use excel to construct control Chart Company X produces a product where its…

A: Given information: The averages of 24 samples are given.

Q: The mean body mass index (BMI) for boys age 12 is 23.6 kg/m2. An investigator wants to test if the…

A: Given  detect a difference in BMI of 2 kg/m2 standard deviation in BMI is 5.7 kg/m2.   Asume that…

Q: Hi could you help me with this question? Thank you!

A: Given : Claim : The mean height of all female undergraduate students at UC Irvine is different from…

Q: poinitsy The length of time it takes to complete a word puzzle is found to be normally distributed…

A: Note:(1). According to Bartleby expert guidelines, we can answer only first question with their…

Q: According to the National Association of Home Builders, the average cost of building a home in the…

A: The population average is given to be $117.91 per sq foot The sample mean and standard deviation are…

Q: Cost of Building a Home According to the National Association of Home Builders, the average cost of…

A:

Q: Do men and women differ in the number of hours per day they watch television?

A: The objective of the question is to determine if there is a significant difference in the number of…

Q: You wish to test the following claim (Ha) at a significance level of a = 0.001. H.:µ = 68.3 Ha:µ >…

A: Given: n= 793.0 ,x̄= 69.1 ,s= 9.8 µ= 68.3 ,significance level(∝)= 0.001 define hypothesis;-…

Q: A professional racing team is holding tryouts at its test track. The team requires its drivers to…

A: The hypothesized mean is 133.

Q: 1. Collected data shows that about 220,00o high schoolers took the AP in 2020. The FRQ section of…

A: Given: Sample size n = 35 Sample mean X = 1.627 Sample standard deviation Sx = 1.32 Formula Used:…

Q: Daily Driving The average number of miles a person drives per day is 24. A researcher wishes to see…

A:

Q: A study included 123 children who were wearing seat belts when injured in motor vehicle crashes. The…

A: From the given information, let X be the amount of time that a patient spent in an intensive care…

Q: An energy company wants to choose between two regions in a state to install energy-producing wind…

A: Given Information:Region A:Sample size Sample mean Population standard deviation Region B:Sample…

Q: Composite scores on the American College Testing (ACT) college entrance exam follow the normal…

A: The following information has been given: Let X is a random variable shows the composite scores on…

Q: Cost of Building a Home According to the National Association of Home Builders, the average cost of…

A: State the given values,

Q: A. Using Excel, answer the following questions of interest at significance level 0.05 1) Is the mean…

A: Given that, the dataset of 10 tablet potency of the batch. The data is taken from the Normal…

Q: If someone was hospitalized for the a virus does taking the medication significantly shorten the…

A: Note: Hey there! Thank you for the question. As you have posted several sub-parts of a question,…

Q: c= 0.90 sample mean = 65.36 sample standard deviation =2.3658 find out the confidence…

A: Answer -Given,   c= 0.90          then         α = 1-0.90          ⇒       Zα2 = 1.645…

Q: Find the indicated z-scores shown in the graph. Click to view page 1 of the table. Click to view…

A: The left value is 0.0268the and right value is 0.0268The z score is the statistical measurement of…

Q: The National Longitudinal Study of Adolescent Health interviewed several thousand teens (grades 7 to…

A: Hello! As you have posted more than 3 sub parts, we are answering the first 3 sub-parts.  In case…

Q: 3. Hypothesis: College students sleep less than the recommended 8 hours. Sample Data: mean = 7.25,…

A: Given, Sample size = 25 Sample mean = 7.25 Sample standard deviation = 2.1   Set up the null and the…

Q: Test a claim that the mean amount of lead in the air in U.S. cities is less than 0.036 microgram per…

A: Introduction: Denote μ as the true mean amount of lead in the air in all cities of the country. The…

Q: A researcher is trying to find the average bowling score of a class of high school students, and the…

A: The provided information is as follows:The distribution appears to normally distributed.

Q: Please no written by hand solutions A promising start-up wants to compete in the cell phone market.…

A: It is required to test whether the new cell phone manufactured by the promising start-up has mean…

Q: According to the National Association of Home Builders, the average cost of building a home in the…

A: Let μ denotes the population mean cost. The test is that the mean cost differs from $117.91 or not.…

Q: Cost of Building a Home According to the National Association of Home Builders, the average cost of…

A: We have to identify hypothesis.

Q: Draw the normal curve based on these values. Refer to the z table. Mean= 92.44 Standard deviation=…

A: The given information is- Mean = 92.44 Standard deviation = 3.86 And P(X > 98 ) = 7.49% = 0.0749

Q: A machine in the student lounge dispenses coffee. The average cup of coffee is supposed to contain…

A: The machine has slipped out of adjustment and that the average amount of coffee per cup is different…

Q: A children's clothing company sells hand-smocked dresses. The length of one particular size of dress…

A: Mean(µ) = 45Sample size (n) = 29Sample mean (x̅) = 46.32Standard deviations (s) = 2.70Significance…

Q: Please PROBLEMS help with 7.14 Renal Disease The mean serum-creatinine level measured in 12 patients…

A: The proportion of patients, who died within 24 hours, i.e., the 24-hours case-fatality rate in 2000…

Q: can someone please answer this

A: 1.Population mean = 45Sample mean is best estimate of the population mean.2.We do not know the…

Q: Compute z-scores and use them to compare values from different data sets Question In a recent…

A: From the provided information, The mean price for a 2000 sq ft home in Florida (µF) = $240,000…

Q: A sample of size 26 was gathered from high school seniors to estimate how many intended to attend…

A: GIven data,n=26p=0.65

Q: Calculate the z-score for the largest value and interpret it in terms of standard deviations. Do the…

A: It is given that mean is 28.766, standard deviation is 3.369, the largest value is 35.100 andthe…

Q: A clinical researcher performs a clinical trial on 10 patients to determine whether a drug treatment…

A: Denote μ1, μ2 as the true mean amount of glucose of the patients before and after the treatment,…

Q: Please tapy answer  The director of admission at a large university advises parents of incoming…

A: given data n = 100x¯ =3154s = 430claim : μ >3000

Q: Baby weights: The weight of male babies less than 2 months old in the United States is normally…

A: Given that  Mean = M = 11.8   Standard deviation = SD = 3.1

Q: le who did workshop = 156 (standard deviation = 8.2);

A: Let X1 be the random variable such that the test score of people who did the workshop. x¯1 : Sample…

Q: Daily Driving The average number of miles a person drives per day is 24. A researcher wishes to see…

A: We have to find critical value...

Q: 5. | Basic Computation: Empirical Rule What percentage of the area under the normal curve lies (a)…

A: μ is the mean of the normal curve, and as all mean, median, and mode all coincide. As the total…