Sleeping outlier: A simple random sample of nine college freshman were asked how many hours of sleep they typically got per night. The results were 8.5, 9, 24, 8, 6.5, 6, 9.5, 7.5, 7.5 a) Leave the outlier in and construct the 80% confidence interval. Round the answer to at least two decimal places.  If the outlier is included the 80% confidence interval is -----< mean <-----

Q: In a survery of 261 households, a Food Marketing Institute found that 69 households spend more than…

A: Given that

Q: In a study of speed dating, male subjects were asked to rate the attractiveness of their female…

A: From the provided information, Sample size (n) = 12 Confidence level = 99%

Q: Health Insurance Coverage for Children A federal report stated that 88% of children under age 18…

A:

Q: in a study of speed dating, male subjects were asked to rate the attractiveness of their female…

A: The sample mean and standard deviation are,

Q: In a survey, 24 people were asked how much they spent on their child's last birthday gift. The…

A:

Q: A research group conducted an extensive survey of 2844 wage and salaried workers on issues ranging…

A: From the provided information, Sample size (n) = 2844 1481 of them responded that is (x) = 1481…

Q: Crash testing is a highly expensive procedure to evaluate the ability of an automobile to withstand…

A:

Q: o find the proportion of San Diegans subscribed to Disney+ in 2019 a researcher randomly selected…

A: Solution: Given information: n= 200 Sample size of people  x = 101 people subscribed to Disney+.…

Q: Construct the indicated confidence interval for the difference between population proportions p1 -…

A:

Q: wants to create a 99% confidence interval around the sample mean. What is the upper bound of the…

A: Here use t - critical for confidence interval because population standard deviation is unknown

Q: A survey of 200 students is selected randomly on a large university campus. They are asked if they…

A: It is given that n = 200 and x = 70.

Q: In a study of speed dating, male subjects were asked to rate the attractiveness of their female…

A: According to the provided information, 6, 7, 3, 9, 7, 6, 7, 9, ,7, 9, 4, 9 α=0.01zα/2=2.576…

Q: The business college computing center wants to determine the proportion of business students who…

A: As Prof. N. G. Das said - "Testing of hypothesis is a rule which, when the sample values have been…

Q: In a study of speed dating, male subjects were asked to rate the attractiveness of their female…

A: The provided information is  x x2 7 49 7 49 3 9 9 81 7 49 6 36 8 64 9 81 8 64…

Q: In a study of speed​ dating, male subjects were asked to rate the attractiveness of their female​…

A: This question requires more accurate answers. Hence I will use excel to solve this question.…

Q: In a study of speed​ dating, male subjects were asked to rate the attractiveness of their female​…

A: Since the sample size is small and population standard deviation is unknown, t distribution can be…

Q: In a study of speed dating, male subjects were asked to rate the attractiveness of their female…

A:

Q: A research group conducted an extensive survey of 2865 wage and salaried workers on issues ranging…

A: From the provided information, Sample size (n) = 2865 Out of which 1649 responded that is x = 1649…

Q: In a study of speed dating, male subjects were asked to rate the attractiveness of their female…

A:

Q: In a study of speed​ dating, male subjects were asked to rate the attractiveness of their female​…

A:

Q: On-Time Arrivals According to the Bureau of Transportation, American Airlines had an on-time arrival…

A:

Q: in a study of speed dating male subjects were asked to rate the attractiveness of their female…

A: Find sample mean and sample standard deviation using TI-84 calculator Use TI-84 calculator function…

Q: Ch.8 Proportions  #1 In a survey of 471 randomly selected gun owners, it was found that 85 of them…

A: We have given that,  Favorable cases (X) = 85 and sample size (n) = 471  Then,  We will find the 95%…

Q: Construct the indicated confidence interval for the difference between population proportions p1-p2.…

A:

Q: A bakery is looking to determine the proportion of cupcakes they sell in the morning as opposed to…

A: It is given that the sample size (n) is 250 and x is 147.

Q: In a study of speed​ dating, male subjects were asked to rate the attractiveness of their female​…

A: For the given sample, x¯=7, from the excel function, =AVERAGE(I7:I18)s=2.5226, from the excel…

Q: Average college cost of tuition fee for all private institutions last year was P36, 400. A random…

A: Step 1: Null Hypothesis: H0: There is no sufficient evidence to conclude that the cost is  greater…

Q: A simple random sample of 400 from a total 1,375 colleges in a country maintained that 39 colleges…

A:

Q: In a study of speed​ dating, male subjects were asked to rate the attractiveness of their female​…

A: The given accurate answer to one decimal place, Hence I will use excel to solve this question.…

Q: In a study of speed​ dating, male subjects were asked to rate the attractiveness of their female​…

A: For given sample, x¯=6.6667, from the excel function, =AVERAGE(G17:G28)s=2.2697  from the excel…

Q: According to study conducted in Turkey in 2018, data collected by observers at randomly selected…

A: The point estimate is calculated as: a. The point estimate for p is 0.70.   b. the value of z at…

Q: Construct the indicated confidence interval for the difference between population proportions…

A:

Q: 1. Alicia would like to know if there is a difference in the average price between two brands of…

A: Answer: Option C is correct. Yes, because the size of each sample is at least 30.

Q: In a study of speed​ dating, male subjects were asked to rate the attractiveness of their female​…

A: Obtain the 99% confidence interval for the population mean μ. The 99% confidence interval for the…

Q: 7) A retired statistician was interested in determining the average cost of a $200,000.00 term life…

A: 7) There is 95% confident that the population mean cost of term life insurance lies within $850 and…

Q: Construct the indicated confidence interval for the difference between population proportions p1 -…

A: It is given that:

Q: A newspaper provided a​ "snapshot" illustrating poll results from 1910 professionals who interview…

A: Here point estimate = 26% and margin of error is ± 3 percentage points To calculate the confidence…

Q: In a study of speed​ dating, male subjects were asked to rate the attractiveness of their female​…

A:

Q: 12. A newspaper article stated that the US Supreme Court received 812 letters from around the…

A: Normality condition: As expected number of success and expected number of failures increasing then…

Q: In a study of speed dating, male subjects were asked to rate the attractiveness of their female…

A:

Q: margin of sampling error was plus or minus 2 percentage points. Following the convention that the…

A: Solution :Given that,Point estimate = sample proportion = P = 0.24 Margin of error = E = 0.02

Q: how does increasing the sample size influence the size of the t statistic in a hypothesis test. How…

A: Increasing the sample size decreases the width of confidence intervals because it decreases the…

Q: In a study of speed dating, male subjects were asked to rate the attractiveness of their female…

A:

Q: A poll found that people from the north now have relatively warm feelings toward people from the…

A:

Q: Use the one-proportion plus-four z-interval procedure to find the required confidence interval.…

A: In a survey, 77% out of 434new mothers breast-feed their infants at least briefly. Condition: By…

Q: In a study of speed​ dating, male subjects were asked to rate the attractiveness of their female​…

A:

Q: Use the one-proportion plus-four z-interval procedure to find the required confidence interval.…

A:

Q: Eight subjects were asked to perform a simple puzzle-assembly task under customary conditions and…

A: (a)degrees of freedom(df) = ( sd1 ^2 / n1 + sd2 ^2 /n2 )^2 / (s1^4 / n1^2 ( n1-1)) + (s2^4 / n2^2 (…

Q: A random sample of college students were asked whether they study more than four hours per week in…

A: Here we need to find the Margin of error from the given confidence interval.

Q: In a study of speed dating, male subjects were asked to rate the attractiveness of their female…

A:

Estimation

A new framework of data analysis where the new statistical methods are used for interpreting the results and analyzing the data is known as estimation in statistics.