In a trial for the university athletics competition, we aim to do inference on the chest size of all male athletes. For a random sample of 70 athletes, the average chest size is 42 inches with a standard deviation of 16 inches.What would be the degree of freedom for the test statistic needed for this inference purpose? A.  69   B. 41    C. 15   D. None of the above.   If the athletics team director claims from his previous experience that the average chest size for the male athletes is less than 45 inches. What should be the corresponding null and alternative hypotheses? A. H0 : μ > 45 vs Ha : μ ≤ 45   B. H0 : μ ≤ 45 vs Ha : μ > 45   C. H0 : μ ≥ 45 vs Ha : μ < 45   D. H0 : μ < 45 vs Ha : μ ≥ 45   What would be the computed test statistic to test the above pair of hypotheses?   A. 1.57   B. -1.57   C.  2.63   D. -2.81

Q: Researchers measured the data speeds for a particular smartphone carrier at 50 airports. The highest…

A:

Q: what would the mean and standard deviation of the sample proportion ˆp be?

A: Let X be Pennsylvanians who have a high school diploma Given, n = 225 p = 0.83

Q: (a) Find the mean of p. (b) Find the standard deviation of p. (c) Compute an approximation for P…

A:

Q: Which of the following is(are) NOT an assumption underlying the use of inferential statistics? a.…

A: Inferential statistics : To make prediction of data we use inferential statistics.  Using…

Q: Hello, my name is Veronica Robles.  I am in Math 1342 stastistics online at San Jacinto College.  I…

A: Given heights in 20-29 age group were normally distributed with mean  = 68.3 inches and standard…

Q: A doctor compares three treatments for arthritis. He uses three samples, each of size six, in the…

A: We have given that  Three treatment  and each treatment having six size .

Q: A. 76% of sunflower seeds will germinate into a flower, and a sample of 800 such sunflower seeds is…

A: Given  n=800, p=0.76  We want to find the mean and standard deviation.

Q: courses results in a mean math score of 22.6 on the college entrance exam with a standard deviation…

A: Given  Population mean μ=22,n=150, sample mean x̄=22.6, s=3.2 , level of significance=0.05 Note:…

Q: 3. A farmer cultivates chillies in two separate fields. When the chillies are ready to be picked,…

A:

Q: Ms. Matter held a dance battle in her stats classes to finally prove the age old question: Who are…

A: We have to test the true difference in average dance scores.

Q: 2. For the following sample of n = 7 scores, compute SS, variance, and standard deviation for the…

A:

Q: Pavan.31

A: Based on the sample data, the calculated test statistic for the hypothesis test comparing the…

Q: is selected from a normal population. The sample mean is 66, and the deviation is 5. Conduct a…

A: sample size(n)=32 Mean(x)=66 population standard deviation(σ)=5 significance level(α)=0.10 claim is…

Q: An electrician wants to know whether batteries made by two manufacturers have significantly…

A: Given Data : For Sample 1 x̄1 = 119.0 σ1 = 4.0 n1 = 113 For Sample 2…

Q: You work for a marketing firm that has a large client in the automobile industry. You have been…

A: (a) Critical value: Using the z-table, the critical value at 98% confidence level is  z0.022=2.326…

Q: Samuel F.B. Morse (1791 – 1872), the creator of Morse Code, claimed that 12% of all letters used in…

A: The population proportion is 0.12=12100, and a random sample of 196 letters. That is, n=196,p=0.12.

Q: 3. The heights of 18-year old men are normally distributed with mean 68 inches and standard…

A: "Since you have posted a question with multiple subparts we will provide solutions only to the first…

Q: Claim: The mean pulse rate ( in beats per minute) of adult males is equal to 69 BPM. For a random…

A: From the provided information, Sample size (n) = 129 Sample mean (x̄) = 70.3 Sample standard…

Q: MEAN STANDARD DEVIATION NUMBER OF PLANTS FIELD A FIELD B 1.3m 1.6m 0.5m 0.3m 22 24

A: It is given that: Field AField Bsample mean (in m)x¯1=1.3x¯2=1.6sample SDs1=0.5s2=0.3sample…

Q: A laptop producer has been getting complaints on the batteries they install. Particularly, the…

A: Given that there are 10 over heating batteries in the batch of 30. The probability of overheating…

Q: For a 4-units class like Statistics, students should spend average of 12 hours studying for the…

A:

Q: .In university’s football team average weight of players is around (72) kg, and the standard…

A: Given Information: Heights of football team players are normally distributed. Mean μ=72  Standard…

Q: The student body at many community colleges is considered a "commuter population". The following…

A: 1.Given information:The sample size is n = 55.The sample mean is x̅ = 21.5.The population standard…

Q: 2. Paired Sample: A health educator wants to evaluate the effects of a dental film on the frequency…

A:

Q: A student collected a sample of 50 individuals' heights. He mistakenly recorded the tallest…

A: A student collected a sample of 50 individuals' heights. He mistakenly recorded the tallest…

Q: An electrician wants to know whether batteries made by two manufacturers have significantly…

A: Denote μ1, μ2 as the population means voltage of batteries manufactured by Manufacturers A and B,…

Q: This past yeal, through (e). A Click the icon to view the data table. (d) Explain why a large sample…

A: Given dataThis past year an organisation conducted a surveyThe results of the survey are shown

Q: 2) The principal randomly selected six students to take an aptitude test. Their scores were: 71.3…

A: We have given the data of test scores of randomly selected students to take an aptitude test.…

Q: 1. For a random sample of 100 undergraduates, suppose the mean and standard deviation on the SAT…

A: There are two types of error exist in hypothesis testing. They are type 1 and type 2 error.  Type 1…

Q: The student body at many community colleges is considered a "commuter population". The following…

A:

Q: ve subpart

A: Observations are given in the following table: 125 118 125 128 124 126 124 119 123 123 120 130…

Q: standard deviation of such tariff rates is $1000, determine the probability that the mean tariff…

A: Given Standard deviation=1000 n=200

Q: The graphic in Question 1 includes the statement "accurate to within +/- 2.9 percentage points, 19…

A: It is given that accurate to within (margin error) 2.9 percentage points, 19 times out of 20. Data…

Q: Suppose the math department chair at a large state university wants to estimate the average overall…

A: Given Data : Sample Size, n = 40 Sample Mean, x̄ = 3.8303 standard…

Q: According to the College Board, scores on the math section of the SAT Reasoning college entrance…

A: Given information, Mean =516 Standard deviation =116

Q: In a certain test in Calculus, the mean score of a group of 100 students was 30 and the standard…

A: The mean for calculus is 30 and standard deviation is 8, the mean for physics is 52 and standard…

Q: I would like to test the hypothesis that the average round trip airfare between Phoenix and San…

A: Given For phoenix  Sample mean= x̄1=240, sample size=n1=18, sample standard deviations s1 =70 For…

Q: Which of the following is NOT a misuse of​ statistics?Choose the correct answer below.A.Utilizing…

A: There are given four options.  Option C is itself wrong because given misleading graphs

Q: According to a November 2014 Winthrop poll, of 852 polled SC residents, 222 of them said they plan…

A: Suppose p is the true population proportion of SC residents who will spend less.