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: After 8 points are added to each score in a sample, the mean is found to be M = 40. What was the…

A: Let us have n number of scores in a sample. After adding 8 to each score sample mean will be M = 40…

Q: Carol and David want to estimate the mean amount of time people spend at their local shopping mall.…

A: The following information has been given: Carol's sample: 38, 115, 68, 47, 25, 51, 32, 95 David's…

Q: Two different surveys will be conducted to estimate the mean salary of employees who have taken a…

A: The confidence interval inversely depends on the sample size. The formula for the confidence…

Q: The average American gets a haircut every 39 days. Do college students get their hair cut less…

A: A hypothesis test is a statistical  method that uses sample data to evaluate a hypothesis  about a…

Q: In a recent survey, 8 college graduates were each asked for the number of hours they work each week.…

A:

Q: On a survey, 8 students reported how many minutes it takes them to travel to school. Here are their…

A:

Q: udents? The data below shows the results of a survey of 20 college students asking hem how many days…

A: Given Sample size = 20 Sample sum = 812 Sample mean = 40.6

Q: What score can be added to the following data set in order for the new median to be 12? 3, 3, 6,…

A: The given data is as follows:3, 3, 6, 10, 14, 15, 17The objective is to compute the score that can…

Q: Here are the scores of 11 students on an algebra test. 59, 69, 75, 77, 81, 82, 84, 85, 91, 91, 92…

A: The scores of 11 students on an algebra test is given. Thus, n=11.

Q: Determine whether the number described is a statistic or a parameter. The average ACT score of all…

A: The statistic is a measure or characteristics based on sample values. The parameter is a measure or…

Q: A sample mean has a z= -4.0 on the sampling distribution created from the population of psychology…

A:

Q: After 5 points are added to each score in a sample, the mean is found to be M=45 . What was the…

A: Given data: c = 5 points are added to each score in a sample. New mean, M = 45 Let the original mean…

Q: In a distribution of scores, the mean is 12, the median is 8 and the mode is 4. Describe the shape…

A: A distribution is said to be positively skewed / right skewed if Mode > Median > Mean  and…

Q: A couple plans to have 14 children. Assume that girl and boy births are equally likely. Find the…

A: A couple plans to have 14 children. Assume that girl and boy births are equally likely.

Q: 16. Saraya surveyed people in her community to find out how many states they had visited. She…

A:

Q: The final exam scores for Mr. Allen’s class are shown below. 56, 59, 60, 65, 71, 72, 74, 80, 80, 83,…

A: Given observation and calculation is shown below Score 2*score 56 112 59 118…

Q: Determine whether the value is from a discrete or continuous data set. Weight of gravel in a pile is…

A: There are broadly two types of variables: Quantitative variable: As the name suggests, those…

Q: You wish to estimate the mean cholesterol levels of patients two days after they had a heart attack.…

A: Variable: A variable is an attribute or the characteristic that can be measured. The value of the…

Q: Determine the mean for the data listed below. Round to 2 decimals.…

A: The formula to calculate the mean is: Calculate the sum as follows: ∑x = 29+26+25+59+10+...+25 =…

Q: The data set shows the ages of members in a book club.

A: If the data set is in even numbers, then the median is the mean of the middle two terms, when data…

Q: teacher

A:

Q: ect the correct answer. e dot plots represent the number of students who enrolled each year st 24…

A:

Q: The test scores for five students were 59, 60, 63, 76, and 87. How many points greater than the…

A: The mean is the average of all the values, or it is the sum of all the values divided by the number…

Q: Use a dot plot to display the data, which represent the systolic blood pressures (in millimeters of…

A: The systolic blood pressure data is, 120 135 140 145 130 150 120 170 145 125 135 110 160 180…

Q: Italian Tours offers a daily sightseeing trip around Florence. The list below gives the number of…

A: Solution: The give data is 21, 26, 38, 47, 43, 18, 46, 21 and 18.

Q: Statistics jobwant workstatus age tv gpa Valid 134 133 133 132 134 Missing 1 1 Mean 23.29 3.88 2.50…

A: Given info: From the given SPSS output, the number of hours participants watch television in a…

Q: The average American gets a haircut every 44 days. Is the average smaller for college students? The…

A: Introduction: Denote μ as the true average number of days that college students get a haircut.

Q: the table of information pendent), and yearly salary - is the correlation coeffic

A: Hi! Thank you for the question, As per the honour code, we are allowed to answer three sub-parts at…

Q: This bar graph shows the number of students who scored 1, 2, 3 or 4 in a certain quiz in a class.…

A: 1, 2, 3 , 4

Q: Suppose that the waiting times for patients at a local hospital are normally distributed with known…

A: Given, Suppose that the waiting times for patients at a local hospital are normally distributed with…

Q: A car salesman collected data on how many cars were sold at a dealership per day for two weeks. The…

A: The data for no. of cars sold in 2 weeks is as follows: 6, 7, 4, 3, 1, 2, 6, 6, 6, 7, 4, 4

Q: Scores on a test have a mean of 66 and a standard diviation of 9. Michelle has a score of 57.…

A: Given,          Mean μ=66          Standard deviationσ=9          Michelle has a score X=57

Q: A simple data set has been provided to practice the basics of finding measures of variation. 2, 4,…

A: The number of observations is .

Q: 8, 7, 10, 6, 7, 16, 8, 16 Find the mean weight of these cats. If necessary, round your answer to the…

A: It is given that the weight of 8 cats.   Mean: It is the sum of the observations divided by the…

Q: O Mean (a) Which measures of central tendency do O Median not exist for this data set? Choose all…

A: Given is the data : 131, 139, 152, 161, 163, 165, 176, 181, 185, 185, 185, 189, 193, 194, 195, 206,…

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.