A lecturer claims that the average exam mark of women is the is different from that of men. He takes a sample of 45 women (population 1); the average and standard deviation of this sample are 67% and 6% respectively. He also takes a sample of 40 men (population 2); the average and standard deviation of this sample are 65% and 9% respectively. (Let μ1 and μ2 denote the population averages of the women and men respectively.)The value of the appropriate test statistic which can be used to test the hypothesis is 1.19. Calculate the p-value for the hypothesis for this given value of the test statistic.

Q: Test scores for a history class had a mean of 77 with a standard deviation of 4.4. Test scores for a…

A: The z-score: The z-score of a random variable, X, with mean μ and standard deviation σ, at the point…

Q: The lengths of pregnancies in a small rural village are normally distributed with a mean of 261 days…

A: Here, µ=261 and σ = 17.

Q: A sample has a mean of M =75 and a standard deviation of s = 15 . Find the z-score for each of the…

A: Given that, Mean (M) =75 Standard deviation (s) = 15

Q: Given a dataset: {x1, X2, Xn}, .... a) write down the formula for the standard deviation (T ). (b)…

A:

Q: Use z scores to compare the given values.   Based on sample​ data, newborn males have weights with a…

A: Answer: the given value are Based on sample​ data, newborn males have weights with a mean of μ =…

Q: A pizza restaurant in a small college town finds that the average delivery time (assuming no unusual…

A: We have given that mu=28.8 ,sigma=6 and sample size n =64 Z-socre=(x-mu)/sigma

Q: Assume that adults have IQ scores that are normally distributed with μ=38 and a standard deviation…

A:

Q: A sample of 20 elements selected from a population produced a mean of 65 and a standard deviation of…

A:

Q: A pizza restaurant in a small college town finds that the average delivery time (assuming no unusual…

A: We have given that Sample size n=64 ,mu=28.8 and sigma=6

Q: Agricultural scientists are testing a new chicken feed to see whether it increases the number of…

A: The level of significance is α=0.05. The test is right tailed test.   Decision rule: (at 5% level of…

Q: The average GPA at Torrance High School (THS) is 3.20 with a standard deviation of 0.2. Trevor…

A: It is given that  For Sam’s: Mean, μ = 3.40 Standard deviation, σ = 0.3   For Trevor’s: Mean, μ =…

Q: A bottled water distributor wants to determine whether the mean amount of water contained in…

A: Given information- Sample mean x̅ = 0.995 Population mean µ = 1 Sample size = 45 Standard deviation…

Q: A variable of two populations has a mean of 50 and a standard deviation of 12 for one of the…

A: Given that: The first population's sample mean and sample standard deviation are as follows:…

Q: below. a. Compute a 93% confidence interval for μ, the average weight of these bags of chips. Round…

A: Given that  Sample size n =31 Sample mean =209.11 Population standard deviation =3.27 NOTE:-…

Q: According  to  a  survey  on  part-time  workers  (their  monthly  salaries  can  vary  by…

A: Given:  The average  base salary for women is higher than the average  base  salary for men. The…

Q: A standardized exam's scores are normally distributed. In a recent year, the mean test score was…

A: For the distribution of the given standardized exam score, it is given that:The mean, And the…

Q: a.  Determine Isabelle's z-score (to the nearest hundredth) for her English test if she scored an 85…

A: Introduction: A Z-score is a numerical measurement that describes the relationship of a value to the…

Q: Alexander Borbely is a professor at the University of Zurich Medical School, where he is director of…

A: Hrs Xi         Freq fi             pi=fi/200         xi* pi              pi*(x-7.9)^2 3.5…

Q: A pizza restaurant in a small college town finds that the average delivery time (assuming no unusual…

A: From the provided information, Mean (µ) = 28.8 minutes Standard deviation (σ) = 6 minutes Sample…

Q: The mean score on a driving exam for a group of drivers education students is 68 points with a…

A:

Q: Claim: The mean pulse rate (in beats per minute) of adult males is equal to 69 bpm. For a random…

A: The hypothesized mean μ=69 The sample size n=144 The sample mean  x¯=69.5 The sample standard…

Q: Nationwide, the amount charged by doctors for performing a particular minor surgical procedure has…

A:

Q: Use z scores to compare the given values. Based on sample data, newborn males have weights with a…

A: Given that, Based on sample data, newborn males have weights with a mean of 3282.9 g and a standard…

Q: Let X be the number of students absent from a randomly chosen class on any given day. The standard…

A: Given: Standard deviation σ = 1.15 Formula used: Empirical rule: 68% of data falls within 1 standard…

Q: The College Board reports that the national mean and standard deviation for high school seniors…

A: Given data is SAT-V 480 560 490 410 520 500 480 450 470 530 520 550…

Q: The sample standard deviation for the Goodyear Silents' score is 5.55. (mean is 6) The sample…

A: Z=X¯-μσ=Z score μ=mean and σ= standard deviation

Q: Tobacco and Alcohol Use in Animated Children’s Movies: A data set in lists times (in seconds) that…

A: The null and alternative hypothesis is, The type of test is two tailed test.

Q: The average (or mean) amount of hours spent on social media per day is 2 hours and the standard…

A: Given that, The random variable X is the number of hours spent on social media per day. The average…

Q: An IQ test is designed so that the mean is 100 and the standard deviation is 18 for the population…

A:

Q: An economist believes that the average annual income of men and women are the same in the United…

A: Solution: Given information: n1= 75 Sample size of men n2= 50  Sample size of women x1= $52004…

Q: For a data set of the pulse rates for a sample of adult​ females, the lowest pulse rate is 39 beats…

A: Hello there! there are more than 3 subparts in the question. According to our policies cannot answer…

Q: An SRS of 25 recent birth records at the local hospital was selected. In the sample, the average…

A: given data  normal distribution n = 25σ = 6.5x¯ = 119.6describe sampling distribution.

Q: . The average Stats' score of a sample of JMU students on test 1 was 75.7% and the standard…

A: The average stat score of JMU students is, μ=75.7%The standard deviation of the population is,…

Q: A certain nighttime cold medicine bears a label indicating the presence of 600 mg of acetaminophen…

A: "Since you have posted multiple questions we will provide solutions only to the first  question as…

Q: Use z scores to compare the given values. Based on sample data, newborn males have weights with a…

A: Given for males : x¯=3204.8 gs=770.8 g Given for females : x¯=3066.5 gs=585.9 g

Types of Bias

Statistics is the study of data collection, organization, analysis, interpretation, and presentation. Statistical bias is a characteristic of a statistical technique or its findings in which the expected value deviates from the actual root quantitative parameter being estimated. According to the actual definition of bias, it refers to the tendency of a statistic to overestimate or underestimate a parameter.