A parenting magazine reports that the average amount of wireless data used by teenagers each month is 7 Gb. For her science fair project, Ella sets out to prove the magazine wrong. She claims that the mean among teenagers in her area is less than reported. Ella collects information from a simple random sample of 25 teenagers at her high school, and calculates a mean of 6.5 Gb per month with a standard deviation of 1.8 Gb per month. Assume that the population distribution is approximately normal. Test Ella's claim at the 0.01 level of significance. Step 2 of 3: Compute the value of the test statistic. Round your answer to three decimal places.

Q: O subjects in a study were randomly assigned into two equally sized groups. One group was shown a…

A: Given data is:

Q: What proportion of z scores lie beteeen -2 and +2 in the height in inches data set? Round your…

A:

Q: Illustrate the Test R2 for significance?

A: Coefficient of determination: The coefficient of determination (r2) is the percentage of total…

Q: additionally how would you find the: test statistic & p-value

A: The claim is that mean lead concentration is less than 19 μg/g Null hypothesis: H0 : µ=9 μg/g…

Q: Use the confidence interval to find the margin of error and the sample mean. (.228, 0.390)

A: We know that the Margin of error = (upper_limit - lower_imit )/2 and Sample mean = (upper limit +…

Q: Select the best response. Paired sample t-test focuses on data in the: A. first score in the pair…

A: In paired t test, means of two related groups are compared.

Q: Explain about Scheffe’s test.

A:

Q: Please no written by hand solution and no img  In a random survey of 40 algebra 1 students at A&M…

A: Number of students who love their math class = 30 Total number of students surveyed = 40

Q: AP Stats The College Board reported that 58.7% of allstudents who took the 2010 AP Statistics exam…

A: The hypotheses are given below: Null hypothesis: H0: p=0.587. Alternative hypothesis: H1:p>0.587.…

Q: Describe the t test for 2 independent samples.

A: In order to assess whether there is statistical evidence that the related populationmeans are…

Q: se Brianna's sample to estimate the number of red gumballs in the jar.

A: Given that  Class jar containing 200 gumballs of two different colors  (Red and green) Brianna draws…

Q: calories burned is actual less than 546, and find the P-value. On the basis of the P-value, should…

A: It is given that  Population mean, μ = 546 Sample mean, x̅ = 544.8 Population standard deviation, σ…

Q: . Determine the​ p-value and interpret its meaning.   The​ p-value is enter

A:

Q: A social worker reports that 30% of workers in a factory are below 15 years of age. Of the 120…

A: Let p denotes the population proportion of workers in a factory who are below 15 years of age. Given…

Q: What is the main difference between z score and T score?

A: Z Score and T scores are both used in Hypothesis testing.  Z score is used while using z test and T…

Q: What is the mean for the combined set if both of the original samples have n = 4 scores? What is the…

A: Given that For sample 1, mean M1 = 8 For sample 2, mean M2 = 16

Q: What does the p values tell us about the safety of the car?

A: With respect to the output of the pairwise comparison

Q: Use the information provided here to answer the following questions. H0 : p 60, n 36, Xbar = 58.…

A: option (a) which is the information provided characterizes one smaple, one sided test is correct…

Q: Suppose you have a group of fourth graders and a group of eighth graders, and you want to compare…

A: We have to determine which test use for given situation.

Q: Use technology to perform two-sample t-test to determine whether there is a difference in the mint…

A: Two sample t -test    To determine whether there is difference in the mint dates and the values of…

Q: scores

A:

Q: At a trade show, you interview a random sample of 50 attendees. The results of the survey show that…

A: Givensample size(n)=50p^=0.59α=0.05

Q: What is p value ?

A: The​ P-value is the probability of observing difference in the sample statistic this high or higher…

Q: Fill in the blanks: Write exact answers, except for the p-value. A company claims that each of their…

A:

Q: the expression in the accompanying discussion of sample size to find the size of each sample if you…

A:

Q: How do ypu find the preducted score is the price is $60

A: Let the independent variable (x) = price ($) Let the dependent variable (y) = overall score The…

Q: Mina is waiting in line at the Department of Motor Vehicles (DMV). Her wait time is in the 85th…

A: It is clearly given in statement that at Department of Motor Vehicles waiting line is Mina wait time…

Q: How do you test for reliability

A: Reliability: Reliability is the consistency of the measures used in a testing process. In other…

Q: Describe the formula used to calculate a z-score?

A: The formula used to calculate z-score is

Q: The number of hours per week that the television is turned on is determined for each family in a…

A: Given information- Mean of the data = 35 hours Median = 31.2 hours Sample size = 24 families We have…

Q: What's the Z score and how is it calculated?

A: We know z-score is used in many fields. But we should know what is the meaning of z-score and how to…

Q: Find P₄₁ , which is the score separating the bottom 41% from the top 59%. P₄₁ =

A: It is given that the area is 0.41.

Q: Forty percent of players scored 8 points or Sixty percent of players scored 8 points or more - less…

A: Given that,The 40th percentile for points scored per player in a game is 8.That is,P40 = 8

Q: As part of a sixth-grade class project the teacher brings to class a large jar containing 200…

A: Given, Population size = 200 Sample size = 25 Red gumballs = 15 Green gumballs = 10

Q: Find the five-number summary for the following 10 values: 22, 22, 25, 19, 35, 29, 28, 19, 32, 27…

A:

Q: You want to estimate the percentage of statistics students who get grades of C or better. How many…

A: Obtain the sample size. The formula of sample size is, Obtain the area of probability in the right…

Q: He then filled 80 simple white cups with soda, half diet and half regular, and asked each person to…

A: a. The hypotheses are given below: Null hypothesis: H0:p=0.5 Alternative hypothesis: H1:p≠0.5 Since…

Q: What's the p-value?

A: In this case, we need to define the p-value.

Q: how did you find the Z score?

A: The critical value  of z for 97% confidence  interval  is 2.17.

Q: Mary is participating in a 6-day cress-country biking challenge. She biked for 60, 51, 62, 63, and…

A: According to the question, 60+51+62+63+54+x6=59                    x = 64

Q: P-Value means

A: P- value means: Define: The P value is defined as the probability under the assumption of no effect…

Q: Why does the use of multiple t tests increases?

A: The multiple t-tests are defined for a one-sample multivariate test and as well as for two samples.…