Dr. Patton is a professor of English. Recently she counted the number of misspelled work in a group of student essays. She noted the distribution of misspelled words per essay followed the normal distribution with a standard deviation of 2.44 words per essay. For the Tuesday class of 50 students, the mean number of misspelled words per essay was 6.05. Construct a 90% confidence interval for the mean number of misspelled words in the population of student essays

Q: Joan's finishing time for the Bolder Boulder 10k race was 1.81 standard deviations faster than the…

A: It is given that the z-score is 1.81.

Q: A researcher found a 95% confidence interval for the proportion of college students who believe in…

A:

Q: Joan’s finishing time for the Bolder Boulder 10K race was 1.76 standard deviations faster than the…

A: Given   x=μ+1.76 σ   ∴z=1.76 ∵1.76 SD  above mean       n=420 women

Q: A pharmaceutical company needs to know if its new cholesterol drug, Praxor, is effective at lowering…

A: Let the treatment group be population 1 let the control group be population 2significance…

Q: Maya recently switched her primary doctor to one specializing in caring for elderly patients. On her…

A: The objective of this question is to determine whether the mean systolic blood pressure among…

Q: Ten years ago, the mean age of death row inmates was 44.9 according to the US Dept.of Justice. A…

A: The provided data is,

Q: Joan’s finishing time for the bolder boulder 10k race was 1.85 standard deviations faster than the…

A:

Q: A car repair business randomly selects receipts for parts purchased on 16 different jobs. The mean…

A: given data, n=16x¯=31.32s=30.42CI=0.95α=1-0.95=0.05df=n-1=16-1=15we  have to construct the 95%…

Q: What is the difference between commuting patterns for students and professors. 11 students and 14…

A:

Q: Marine biologist at Nova Southeastern University spent three months on a research expedition tagging…

A: The given information is: For females,  Sample sizen1=142 Sample meanx¯1=68.3 Sample standard…

Q: Dana is a math professor who usually teaches in-person but has recently started teaching online.…

A: Given that, mean , μ=76.5standard deviation,σ=19.1and sample mean(class-average),x =68.4 and sample…

Q: Maya recently switched her primary doctor to one specializing in caring for elderly patients. On her…

A: a) Null and alternative hypotheses:H0​:μ=115H1​:μ>115 b) t-test statistic degrees of freedom = 21…

Q: An endocrinologist is interested in the effects of depression on the thyroid. It is believed that…

A: Given:

Q: A local police department made an effort to determine the average speed of automobiles travelling…

A:

Q: The mean for the verbal component of the SAT is reported as 500, with a standard deviation of 100. A…

A: It is given that the sample mean is 498 and the population standard deviation is 100.

Q: he average weight of 20 randomly selected cars was 3500 pounds. The sample standard deviation was…

A: given data, n=20df=n-1=20-1=19x¯=3500 pounds s=315 pounds CI=0.90α=1-0.90=0.10

Q: Among those taking the Graduate Record Exam, 18 people are randomly selected. This group had a mean…

A:

Q: A pharmaceutical company needs to know if its new cholesterol drug, Praxor, is effective at lowering…

A: The objective of this question is to test the pharmaceutical company's claim that its new…

Q: 2. In a recent study of 35 college students, the mean number of hours per week that they played…

A: According to the given information in this question  We need to find the 95% confidence interval

Q: A paper describes asrvey ofasample of e maie students and a sampie of 5 female students ata large…

A:

Q: Pyramid Lake is on the Paiute Indian Reservation in Nevada. The lake is famous for cutthroat trout.…

A: Determine the level of significance.   Significance level:    In order to decide how small the…

Q: Suppose we are contracted by the Justice Department to study the extent of juvenile delinquency.  We…

A:

Q: A runner wants to know her average mile running time. She records a sample of 25 running times. The…

A: Solution: Let X be the mile running time. From the given information, x-bar=6.5 minutes, s=0.7…

Q: Fran is training for her first marathon, and she wants to know if there is a significant difference…

A: Given data,n1=40x1=46.6σ1=4.6n2=45x2=48.8σ2=2.4Compute value of test statistic?

Q: An administrator in charge of undergraduate education on a large campus wanted to estimate the…

A: Introduction: The 100 (1 – α) % confidence interval for the population mean, μ, when the population…

Q: A researcher wants to know if men have a lower anxiety level than women in response to social…

A: a)To test:H0:μ1=μ2H0:μ1<μ2

Q: se M has a mean of 1,417.31 and a standard deviation of 67.54. The mean number of orders per day is…

A: Given: Mean of orders of warehouse M=1417.31Standard deviation of orders of warehouse M=67.54 Mean…

Q: A nutritionist conducted a study on the eating patterns of early adolescent boys and girls. Calorie…

A: GivenFor boysThe mean calories per day =3300standard deviation =790 For girlsThe mean calories per…

Q: 73 full time workers were surveyed on how many hours they spend watching television during the week.…

A: Given information, n=73x¯=3.2s=0.2 Confidence level is 95% significance level is 5% df=n-1=73-1=72 t…

Q: A pharmaceutical company needs to know if its new cholesterol drug, Praxor, is effective at lowering…

A: a)To testH0:μ1=μ2H1:μ1<μ2       It is given that n1=39x1=19.8s1=2.1n2=46x2=18.4s2=2.8

Q: shoppers at the mall spend the same amount of money on average the day after Thanksgiving compared…

A: Given that    Sample sizes n1=56      , n2=43       Sample means X̄1= 145     , X̄2=123    , ?1 =46…

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.