The average American gets a haircut every 37 days. Is the average smaller for college students? The data below shows the results of a survey of 15 college students asking them how many days elapse between haircuts. Assume that the distribution of the population is normal. 41, 40, 27, 23, 38, 26, 42, 32, 30, 36, 26, 28, 31, 32, 36 The test statistic =          (please show your answer to 3 decimal places.)   The p-value =           (Please show your answer to 3 decimal places.)

Q: In an anonymous survey, 34 students reported the hours they studied for a statistics final exam. The…

A: In the given study, 34 students reported the hours they studied for a statistics final exam.

Q: 2.97 Women in the Workforce. In an issue of Science (Vol. 308, No. 5721, p. 483), D. Normile…

A: Given : The given data is 12, 13, 18, 21, 26, 27, 28, 28, 29, 29, 33, 34, 34, 35, 39, 40, 44

Q: 14 A scientist recorded the following measurements. 4, 5, 3, 6, 3, 8, 4, 9, 6 What are the first…

A: Given that the scientist recorded the following measurement      4,5,3,6,3,8,4,9,6 Here we have to…

Q: Below are exam scores from a statistics class with 25 students: 100, 88, 90, 72, 76, 64, 68, 60, 78,…

A: From the provided information, Sample size (n) = 25 The number of students who scored above a 60 is…

Q: 4, 4, 5, 6, 9, 9, 9, 12, 13, 14, 14 26. The mean is 27 The median of the distribution is 28. The…

A: Solution: Given data is already in ascending order so use given data n=number of elements=11…

Q: The mean height of 24 male workers in a factory is 62 inches and the mean of 36 female workers in…

A: Answer: From the given data, Number male workers = 24 = n1 Number of female workers = 36 = n2 Mean…

Q: Which bird is faster: Flamingos or peacocks? A study was done to estimate the true mean difference…

A: We have to find the confidence interval for difference in the mean running speed for all flamingos…

Q: pressure of a random sample of 45 employees at Dewey, Lie, and Howe is measured. Based on the…

A: It is given asThe 95% confidence interval is C.I. = ( 142, 165 )

Q: Snoop Incorporated is a firm that does market surveys. The Rollum Sound Company hired Snoop to study…

A: As requested, I have provided answer for blanks

Q: Cardiovascular Disease The data in Table 1 are a sample of cholesterol levels taken from 24 hospital…

A: Mean, x̄= ΣXi/n Here sample size is n= 24 Mean x̄= 499/24 = 20.79167 Standard deviation= √Σ(Xi-x̄)2…

Q: If instead of 25, 80 male runners are selected for the study, what is the sampling error at 95%…

A: Given that Sample size n = 80 Sample mean = 53 Population SD = 5.5 Margin of error E = 0.8 The…

Q: Give two sets of five numbers that have the same mean but different standard deviations. OSet 1: 3,…

A:

Q: Explain how the relationship between the mean and the median provides information about the symmetry…

A: The question is about measures.Introduction :i ) The formula of mean is given by ii ) Median is the…

Q: Suppose approximately 80% of all marketing personnel are extroverts, whereas about 60% of all…

A: Binomial Distribution : The PDF of the binomial distribution is given as P(X=x)= nx·px·(1-p)n-x…

Q: Here are the scores of 12 students on an algebra test. 62, 63, 64, 64, 67, 68, 69, 70, 72, 73, 74,…

A: It is given that the data set62, 63, 64, 64, 67, 68, 69, 70, 72, 73, 74, 86.

Q: Sth Grade Unit 6: Statistics The high temperatures for a week are shown 15°, 34°, 17°, 15°, 16°, 8°…

A: Given data is ; 150 , 340, 170,150,160,80 data in ascending order : 80,150 , 150,160,170,340 we…

Q: The statistics below provide a summary of the distribution of heights, in inches, for a simpl random…

A: Firsti quartile (Q1) value interprets that, 25% of the data lie below Q1 value and 75% of the data…

Q: The average and standard deviation for ACT scores are 20 and 3 respectively. average and standard…

A:

Q: The data below represent the length (in miles) of a random sample of tornadoes in a specific area.…

A: Consider the given dataset: Tornado Length (In…

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: A professor wants to know the average score on her statistics midterm. She takes all 50 registered…

A: A professor wants to know the average score on her  statistics midterm.She takes all 50 registered…

Q: Which one measure of variation should you report for the variable AGE (people write their actual age…

A: The measures of variation are descriptive statistics that determine the spread of the data.

Q: Listed below are pulse rates (beats per minute) from samples of adult males and females. Find the…

A: MaleFemale808772846294889464729281598762756492986654866887576885735482

Q: Please answer Question E Below is a sample of 64 responses of a survey of Ward 3 residents in…

A: Given,n=64p=0.69mean(μ)=0.69standard deviation(σ)=p(1-p)nσ=0.69(1-0.69)64σ=0.0578

Q: Use the following data to answer the next set of questions. Round your answers to the nearest…

A: The question is about mean and MAD using dot plot Given :

Q: A tour company in a major city has a daily sightseeing trip. Each day, tour officials record the…

A: X: 39, 42, 37, 30, 40, 31, 38, 43, 50We have to findMeanMedianMode

Q: The following are the distances (in miles) to the nearest airport for 13 families. 11, 12, 13, 15,…

A: data are alreaady in accending order 11,12,13,15,16,17,19,20,23,24,24,31,50 n = 13

Q: The Centers for Disease Control and Prevention recommends that adults get between 7-8 hours of sleep…

A: From the dot plot the data are 6, 6, 6, 6, 6.5, 7.5, 7.5, 7.5, 8, 8, 8

Q: The answer is C Select the correct statement about the mean and median for the histogram below. The…

A: It is known that, for positively skewed distribution the mean of a set of observation is greater…

Q: The mean number of sick days an employee takes per year is believed to be about 10. Members of a…

A: Given:  Sample size = 8, sample mean = 10, level of significance = 0.05.

Q: c. The test-statistic for this data = (Please show your answer to three decimal places.) d. The…

A: From the given information, it is clear that,  Level of significance α=0.10 We have to frame the…

Q: The number of cans of soft drinks sold in a machine each week is recorded below. Develop forecasts…

A: Given Weekly sales, We have to forecast for week 10 with 3 period moving average We have to…

Q: Give two sets of five numbers that have the same standard deviation but different means. Oset1: 2,…

A:

Q: Here is a distribution of quiz scores for a statistics course: 87, 91, 74, 73, 80, 84, 68, 75 What…

A: according to given data we have to find out the range for the given datadata,87,91,74,73,80,84,68,75

Q: The seniors in my math classes were asked about whether they would pay for either a senior trip or a…

A: The question is about categorical data analysis Given :   To test : A senior trip is more popular…

Confidence Intervals

When we calculate intervals in probability and statistics, it can be simply termed as finding out a confidence interval. The confidence interval is usually calculated from the data set which is observed. The value of the parameter that needs to be calculated is present here only.