Refer to the accompanying data set of mean​ drive-through service times at dinner in seconds at two fast food restaurants. Construct a 90​% confidence interval estimate of the mean​ drive-through service time for Restaurant X at​ dinner; then do the same for Restaurant Y. Compare the results.Construct a 90​% confidence interval of the mean​ drive-through service times at dinner for Restaurant X. Service Times (seconds) Restaurant X Restaurant Y   83 120 120 147 263 100 125 154 117 172 184 125 153 164 212 137 112 125 130 127 338 310 180 115 158 138 138 230 216 295 143 101 232 237 184 122 99 133 240 142 150 200 173 121 65 140 201 153 143 138 197 175 120 139 176 143 155 138 167 138 184 202 230 190 357 237 239 249 231 238 306 210 193 182 185 170 86 102 54 169 105 145 180 157 175 76 142 147 100 130 160 164 120 133 307 151 129 181 146 124     ____ sec<μ<_____ sec

Q: Generic aspirin tablets are supposed to contain 325 mg of aspirin. Listed below are the measured…

A: The 95% confidence interval estimate of the mean amount of aspirin in tablets is obtained below: The…

Q: Refer to the accompanying data set of mean​ drive-through service times at dinner in seconds at two…

A:

Q: Several years ago, 44% of parents who had children in grades K-12 were satisfied with the quality of…

A: The claim is that 44% of parents who had children in grades K-12 were satisfied with the quality of…

Q: Several years ago, 50% of parents who had children in grades K-12 were satisfied with the quality of…

A: Given claim: 50% of the parents who had children in grades K-12 were satisfied with the quality of…

Q: The 2018 General Social Survey contains information on the number of poor mental health days adults…

A: Confidence Interval: It is a range of values in which the required measures can be in with some…

Q: Several years ago, 36% of parents who had children in grades K-12 were satisfied with the quality of…

A:

Q: A Pew Internet Project Data Memo presented data comparing adult gamers with teen gamers with respect…

A: There are two independent samples which are adult gamers and teen gamers. We have to construct 95%…

Q: Several years ago, 33% of parents who had children in grades K-12 were satisfied with the quality of…

A: The formula for the confidence interval for the proportion is, Here, confidence level is 0.90. Use…

Q: The table contains prices from two companies, one on the east coast and one on the west coast, for…

A: The data shows the wholesale price of the east coast and west coast suppliers.

Q: A 95 percent confidence interval for the proportion of parents who use parental controls for…

A: The  CI for the parent's proportion blocking, filtering, or monitoring teenagers' online…

Q: Please answer number 11.

A: Sample mean =40(using the formula ‘=AVERAGE (A1:A8).Sample standard deviation, s = 5.5549(using the…

Q: Which of the following will decrease the width of a confidence interval for the proportion? I.…

A: It is given that the width of a confidence interval for the proportion will decrease.

Q: A researcher wanted to check whether the percentage of Canadian adults with obesity has decreased in…

A: Number of Canadian adults in 2005= 75 Number of Canadian adults in 2009 = 120   significance level =…

Q: An apartment hunter is shopping for either a one-bedroom or two-bedroom apartment in different…

A: Here the new variable is  X= difference  = (Two bed- One bed)  Then mean = ΣXi/n X̄ = (200 + 290 +…

Q: The effectiveness of a weight loss program is to be evaluated by measuring the weight of eight…

A: Obtain the 95% confidence interval for the mean difference. The 95% confidence interval for the mean…

Q: Bad Dawgz is hosting its annual hot dog eating competition which involves eating 14 hot dogs, six…

A: ****Run the code in r(a)

Q: one with a 95% confidence level and the other with a 99.7% confidence level. Which interval is…

A: Confidence interval is probability, which refers that population parameter will fall within set of…

Q: Refer to the accompanying data set of mean​ drive-through service times at dinner in seconds at two…

A: For Restaurant X:   The 90% confidence interval estimate of the mean​ drive-through service time is…

Q: A medical researcher claims that smoking can result in the wrinkled skin around the eyes. The…

A: Given Information: Smokers: n1=150 x1=95 Nonsmokers: n2=250 x2=105 Confidence level is 95%

Q: In Oct. 2008, scientists tested cord blood samples for 20 newborn infants in USA. The scientists…

A: Given information- Sample size, n = 20 Now, degree of freedom is given by- Degree of freedom, df = n…

Q: The table contains prices from two companies, one on the east coast and one on the west coast, for…

A: We have calculated mean and sd using excel:

Q: Several years ago, 43% of parents who had children in grades K-12 were satisfied with the quality of…

A: Given  Several years ago, 43% of parents who had children in grades K-12 were satisfied with the…

Q: 1-Create the confidence interval for the mean Overall Grade for those with 78 or better on Chapter…

A: Given data: Chapter Review Overall Grade 98 96 96 94 94 90 93 94 92 91 92 96 91 93…

Q: Here are summary statistics for randomly selected weights of newborn girls: n= 166, x= 27.9 hg,…

A: Given : n=166x¯=27.9s=7.8For 98% confidence interval,α=1-0.98=0.02

Q: Several years ago, 44% of parents who had children in grades K-12 were satisfied with the quality of…

A: We have given that 44% of parents who had children in grades K-12 were satisfied with the quality of…

Q: A marketing research company is estimating which of two soft drinks college students prefer. A…

A:

Q: Several years ago, 46% of parents who had children in grades K-12 were satisfied with the quality of…

A: Given information Population proportion p = 0.46 We have given that; a recent poll asked 1,045…

Q: Several years ago, 44% of parents who had children in grades K-12 were satisfied with the quality of…

A: According to the given information in this question We need to find 99% confidence interval

Q: If 64% of a sample of 550 people leaving a shopping mall claims to have spent over $25 create and…

A: Given,   Sample size = 550 Sample proportion = 0.64   Critical value: Using z-table, the z-critical…

Q: Several years​ ago, 42​% of parents who had children in grades​ K-12 were satisfied with the quality…

A: Let p be the population proportion of parents satisfied with the quality of education the students…

Q: Several years ago, 43% of parents who had children in grades K-12 were satisfied with the quality of…

A:

Q: A certain coffee packing company has three packing lines with the following production volumes of…

A:

Q: Several years ago, 46% of parents who had children in grades K-12 were satisfied with the quality of…

A: Given  p=0.46, n=1055, X=488

Q: several years ago, 48% of parents who had children in grades K-12 were satisfied with the quality of…

A: Given that  Sample size n =1035 Favorable cases x =497 Sample proportion p^=x/n  =497/1035 =0.4802

Q: Several years ago, 48% of parents who had children in grades K-12 were satisfied with the quality of…

A: Given : n = 1035 X = 497

Q: Refer to the accompanying data set of mean​ drive-through service times at dinner in seconds at two…

A: Given α=0.1n1=50n2=50 Define X¯=sample mean​ drive-through service time at dinner for Restaurant X…

Q: The table contains prices from two companies, one on the east coast and one on the west coast, for…

A: From the provided information, Sample size (n) = 9 The difference table is as follow: East Coast…

Correlation

Correlation defines a relationship between two independent variables. It tells the degree to which variables move in relation to each other. When two sets of data are related to each other, there is a correlation between them.

Linear Correlation

A correlation is used to determine the relationships between numerical and categorical variables. In other words, it is an indicator of how things are connected to one another. The correlation analysis is the study of how variables are related. 

Regression Analysis

Regression analysis is a statistical method in which it estimates the relationship between a dependent variable and one or more independent variable. In simple terms dependent variable is called as outcome variable and independent variable is called as predictors. Regression analysis is one of the methods to find the trends in data. The independent variable used in Regression analysis is named Predictor variable. It offers data of an associated dependent variable regarding a particular outcome.