A random sample of size 49 from normal population yields, mean = 2.6 and standard deviation = 9.7. The lower bound of a 80 percent confidence interval for population mean is O a. 0.28 O b. 0.80 O C. -1.11 O d. -0.19

Q: Highway.MPG Weight.(pounds) Displacement.(liters) 5 7 8 9 10 11 31 24 26 29 26 29 32 25 33 34 3767…

A: The data has been collected on various characteristics of vehicles sold in the U.S. to analyze miles…

Q: What is the sample mean and sample standard deviation of this data set?  Should we be using the Z or…

A: Let μ be the population mean wait time.  The data is given in size 18. No. of wait times (n) = 18…

Q: What is the probability that the average of the 50 samples exceeds 7 minutes? (Hint: std. dev. of 0…

A: Here Given  μ=8 Minutes σ=8 Minutes n=50

Q: Most cases of cervical cancer are linked to a few strains of the human papilloma virus (HPV). The…

A: Assume that p1, p2 are the population proportions of women who developed cervical cancer in the…

Q: Abscissa of point which is lies on ogive curve will be

A: Abscissa is a point which lies in intersection of less than and greater थांटाइप of cumulative…

Q: Why might you run an ANOVA test over a T-test? What factors are in consideration when choosing an…

A: It is needed to discuss about ANOVA test and T-test.

Q: 4. Suppose the model is y₁ = a + Bxi + ei. You have the following data from the problem set 1: i Yi…

A: This is a simple linear regression model (with an intercept i.e. α), where, the response variable is…

Q: Biological oxygen demand (BOD) is a pollution index that is monitored in the treated effluent of…

A: From the provided information, Sample size (n) = 31 Sample mean (x̄) = 3.42 Sample standard…

Q: Which two-way frequency table could represent the data?

A: here given , In a random survey, 2020 seventh graders and 3232 eighth graders are asked their…

Q: Assume that body temperatures of healthy adults are normally distributed with a mean of 99.03°F and…

A: (a) The percentage of adults have body temperatures greater than 99.23F is obtained below as…

Q: You are conducting a study to see if the proportion of women over 40 who regularly have mammograms…

A: From the provided information, The claim is that  the proportion of women over 40 who regularly have…

Q: A medical equipment manufacturer believes that the proportion of faulty blood pressure monitors is…

A: The null and alternative hypothesis are H0: p = 0.11 H1: p < 0.11  p-value = 0.01

Q: Find the regression equation (rounding values to 2 places), letting the first variable be the…

A: x y 68 68 199 605 83 67 89 59 71 62 44 53 53 60 38 64     where, x represents…

Q: The major objective in using a Likert scale is to: a. end up with a measure comprised of at least…

A: Descriptive statistics is a branch of statistics that deals with summarizing and describing the…

Q: According to a study on the effects of smoking by pregnant women on rates of asthma in their…

A: The hypothesized value is 0.22. The value of x is 68 and the value of n is 345.

Q: A radio network determined that the time taken to play a baseball game is normally distributed with…

A: Answer: From the given data, mean(μ) = 160 standard deviation(σ) = 14

Q: In a certain normal distribution 1.25% of the area lies to the left of 42, and 1.20% of the area…

A: Solution-: In a certain normal distribution 1.25% of the area lies to the left of 42, and 1.20% of…

Q: At Rachel's 11th birthday party, 8 girls were timed to see how long (in seconds) they could hold…

A: Let there be two samples which are dependent on each other. The mean significance between the two…

Q: Find the area under the normal distribution curve to the right of Z= -2.10

A: To find the area under the normal curve to the right of -2.10.

Q: Construct a 95% confidence interval to estimate the population variance using a sample of size n=30…

A: From the provided information, Sample size (n) = 30 Standard deviation (s) = 20.05 Confidence level…

Q: What is the probability of winning the first prize? What is the probability of winning the second…

A: You are at a Data Management Game Fair and decide to participate in a classmate’s letter game. To…

Q: Determine the number of arrangements for the word ORANGES if: a) The vowels must stay together. ✓✓…

A: The word is ORANGES.

Q: A study investigated ways to prevent staph infections in surgery patients. The researchers examined…

A: From the provided information, Sample size (n) = 100 From which 88 patients tested positive for…

Q: In 2009, an item cost $15.46 with a price relative of 145. Its base year was 1995. What did the item…

A: Cost in 2009=$15.46  Price relative (Base year)=145  We have to find the item cost in 1995

Q: A medical journal published the results of a study to compare the effectiveness of handwashing with…

A: Mean 1 = 32 Mean 2 =63 Standard deviation 1 =60 Standard deviation 2= 105

Q: 13.2) to A botanist wishes to estimate the typical number of seeds for a certain fruit. She samples…

A: Suppose µ is the population mean number of seeds for the species.

Q: Suppose the mean number of candies in a standard vending machine bag is 47.6 with a standard…

A: Answer: From the given data, Let X: Number of candies in a standard vending machine bag X follows…

Q: You are part of a trivia team and have tracked your team's performance since you started playing, so…

A: Answer: From the given data, population mean(μ) = 78 Sample size(n) = 18 sample mean (x) = 89…

Q: ing to a study of political prisoners, the mean duration of imprisonment for 34 prisoners with…

A: We have given that,  n = 34 , x̄ = 34.9 and σ = 42

Q: Find the critical​ t-value that corresponds to 98​% confidence. Assume 29 degrees of freedom.

A: Confidence level (c) = 98% = 0.98Significance level (α) = 1 - 0.98 = 0.02

Q: Most cases of cervical cancer are linked to a few strains of the human papilloma virus (HPV). The…

A: The sample proportions are: p̂1 = 26% = 0.26 p̂2 = 32% = 0.32

Q: Assume that the mathematics scores on the SAT are normally distributed with a mean of 500 and a…

A: The mean is 500 and the standard deviation is 100.

Q: A sample of 9 days over the past six months showed that that Philip Sherman, DDS, treated the…

A: Sample size (n) = 9 The data values are as follow: 22, 25, 20, 18, 15, 22, 24, 19 and 26 Level of…

Q: It is known that the zinc concentrations are usually normally distributed and have a variance of…

A: The sample size: n=22 The sample mean: x¯=2.6 The population variance: σ2=0.09 Confidence level…

Q: Here are some of the tallest land animals in the world. What is the range of their height? What are…

A: Dataset of Heights is…

Q: According to the Centers of Disease Control, about 9% of Americans between the ages of 12 and 19…

A: p = 9% = 0.09 According to the Centers of Disease Control, about 9% of American young people between…

Q: The population distribution of Santa Clara County by race is provided in the table below. Use these…

A: Race              Proportion       Observed [O]  White                 0.426                  22…

Q: The median is another value used to describe the center of a set of data. Like the mean, the median…

A: The given data is as follows: 24.2,  20.9,  17.8,  19.6,  23.5,  19.1,  14.6,  27.2,  19.2,  18.3,…

Q: D3) Find the standard error for a 90%- Confidence Interval for when 970 people are sampled and 300…

A:

Q: background color appear to have an effect on the variation of word recall scores? X S n 34 15.35…

A: We have given that n1 = 34 , x̅1 =15.35, s1 = 5.94 n2 = 37 , x̅2 =12.49, s1 = 5.43

Q: of ortical care doctors unication through video and audio so that a centraled staff of specially th…

A: The formula of third quartile for even numbers of the ungrouped data is, where, n denotes the total…

Q: 1. How many ways are there to select 5 people from a group of 9 people, without regard to order?…

A: 1. There are totally 9 people out of which 5 people have to select.

Q: Suppose you want to check whether a coin is fair or not. You flip the coin 100 times and get 41…

A: The sample size n=100 The number of favorable outcomes X=41 The level of significance α=0.01 The…

Q: Question 4. The article "Repeatability and Reproducibility for Pass/Fail Data" (J. of Testing and…

A: From the provided information, Sample size (n) = 129 From which 36 resulted in ignition of a…

Q: 98! 1. Simplify. : 100! a) 100 x 99 x 98! b) 1 100 x 99 x 98 c) 100 × 99 d) 1 100 × 99

A:

Q: A biologist is testing to see whether applying organic fertilizer to a corn plant results in more…

A: The given claim is that the average number of ears per stalk is higher for the treated stalks.

Q: how to import the dataset correctly to spss this data set  provides information on temperature…

A: It is requested to give the steps to import the data set to spss.

Q: A manager is interested in testing whether three populations of interest have equal population…

A: a. Suppose µ1, µ2, and µ3 are the means of three populations of interest.

Q: What are the chances your flight will leave on time? The Bureau of Transportation Statistics of the…

A: n=285y¯=78.2333s=4.9460

Q: Suppose that a researcher, using data on class size (CS) and average test scores from 100…

A: Thank you for your question. As per the honor code and guidelines, we suppose to answer the first 3…