In Ontario, chemical accidents account for 1 in 5 workplace accidents. In Que- bec, out of a sample of 2,348 workplace accidents, 438 were of chemical type. Can we conclude that the proportion of chemical accidents in Quebec is lower than in Ontario? Use a significance level of 3%.

Q: when is the significance level determined

A: The significance level defines that the probability of rejecting the null hypothesis when it is…

Q: Spencer would like to study how gender and PTSD in veterans impacts risk for dementia. In order to…

A: Here the variables which are being manipulated are Gender and PTSD , while the variable which is…

Q: Based on the boxplot and descriptive statistics, which group shows more variability in narcissism…

A:

Q: the

A: Effect size is defined as the way of quantifying the difference between the two groups.

Q: Could two samples have the same range but different means? Explain.

A: Yes, Two samples have the same range but different means.

Q: which statistic is equivalent to dividing the sum of scores equally across all members of a sample

A: The statistic measures the characteristics of samples to estimate the population.

Q: Rhino viruses typically cause common colds. In a test of the effectiveness of​ echinacea, 43 of the…

A:

Q: • In a 2019 survey of 560 college students, 171 said they used illegal drugs during the previous…

A:

Q: Suppose that you want to compare the means of several populations, using independent samples. If…

A:

Q: A researcher is interested in determining if the proportion of children that collect specific type…

A: The null and alternative hypothesis is; H0: The proportion of children that collect a specific type…

Q: Paired samples are analyzed differently than separate samples because paired samples lack (note:…

A: As we know, Paired samples take the measurement from the same variable under different conditions,…

Q: In the following question, I would like number 1 to be answered   An epidemiologist found five cases…

A: 1.From the provided information, the table can be obtained as:

Q: If a researcher  decides  to use the .10 level of significance rather than using the conventional.…

A: Relationship between Type I error, Type II error and level of significance:   For small…

Q: Does the one observed sample mean qualify as a common or a rare outcome? Explain.

A: Sample mean qualify as a common outcome if the difference between the sample mean and the actual or…

Q: In your own words, distinguish between measures of association and tests of statistical…

A: The measures of association terms generally used for the correlation coefficient. The correlation…

Q: Test the claim that the proportion of men who own cats is larger than 50% at the .025 significance…

A: Given that  Claim :  The proportion of men who owns cats is larger than 50%  Hypothesized proportion…

Q: An analysis of variance produces SSbetween = 40 and MSbetween = 20. In this analysis, how many…

A: Solution: From the given information, SSbetween=40 and MSbetween =20. Then,

Q: A USU Today survey found that of the gun owners surveyed 275 favor stricter gun laws.  The survey…

A: The hypotheses are given below: Null hypothesis: H0:p=0.50 Alternative hypothesis: H1:p>0.50. It…

Q: Twenty years ago, 46% of parents of children in high school felt it was a serious problem that high…

A:

Q: at a 0.10 significance level?

A: No treatment  Fertilizer  Irrigation  Fertilizer and irrigation  1.212 0.939 0.069 0.852…

Q: What is level of significance?

A: Level of significance: The significance level is a value used as a criterion for deciding how small…

Q: Does the data from the sample support his claim at a significance level of 0.05?

A: It is given that Sample size n = 60 Sample mean M = 3012 Sample SD s = 112 Level of significance =…

Q: A researcher is interested in determining if the proportion of children that collect specific types…

A: Given Solution:

Q: What is the sample size of adults participated in this study?

A: We have to find the sample size for the given situation.

Q: Which statistical method would be most effective to determine if the average size of dogs in Europe…

A: Find statistical method would be most effective to determine if the average size of dogs in Europe…

Q: Is the proportion of twin births among teenage mothers different from the overall figure?

A: It is given that Sample size n = 469 Number of twin births, X = 7 Level of significance = 10% = 0.10

Q: Twenty years ago, 57% of parents of children in high school felt it was a serious problem that high…

A: The single proportion  binomial test is used to compare a proportion of responses or values in a…

Q: Twenty years ago, 56% of parents of children in high school felt it was a serious problem that high…

A: Using the given data fill the blanks

Q: In 1941​, an organization surveyed 1100 adults and​ asked, "Are you a total abstainer​ from, or do…

A: In 1941​, an organization surveyed 1100 adults and​ asked, "Are you a total abstainer​ from, or do…

Q: Can you reject the claim that the proportion of 18 to 24-year-olds living in their parents' homes…

A: Given that  Sample sizes n1=248 , n2=244 Sample proportion p1^=0.515 , p2^=0.412

Q: If the sample size is 30 and the mean score for group one is 5.6, mean score for group two is 7.8,…

A: According to the question,

Q: Pick a sample problem where despite correlation, causation cannot be reasonable argument.

A: Let us take an example of sales of umbrella and sales of raincoats. Sale of raincoats Sale of…

Q: Twenty years ago, 52% of parents of children in high school felt it was a serious problem that high…

A: The hypothesis tests, contain two hypothesis: null hypothesis and alternate hypothesis. The…

Q: For a certain year, a study reports that the percentage of college students using credit cards was…

A:

Q: Assume you are using a significance level of a = 0.05| to test the

A: As given,  α = 0.05 We have to test the claim: µ < 20  Sample size ( n ) = 33 µ = 14 and σ = 8…

Q: Twenty years ago, 53% of parents of children in high school felt it was a serious problem that high…

A:

Q: How does an observed sample mean qualify as a common outcome?

A:

Q: John Isaac Inc., a designer and installer of industrial signs, employs 60 people. The company…

A: ed: Categories Number of Visits Expected Proportions Primary care 29 0.53 Medical specialist…

Q: Twenty years ago, 57% of parents of children in high school felt it was a serious problem that high…

A: From the provided information, Population proportion (p0) = 0.57 Sample size (n) = 700 and x = 244

Q: A concerned group of citizens wanted to know if the proportion of forcible rapes in Indonesia was…

A: Solution: Note: Hello! As you have posted more than 3 sub parts, we are answering the first 3…

Q: You are conducting a study to see if the proportion of voters who prefer the Democratic candidate is…

A:

Q: What does level of significance indicates?

A:

Q: Explain if there was a statistically significant difference between the group means. did you arrive…

A: Test is that whether there was a difference between the three means. Level of significance = 0.01

Q: What statistical test is most appropriate for comparing the proportions of two categories of two…

A: Z-test for two sample proportion is most appropriate to compare the proportions of two categories of…

Q: Twenty years ago, 52% of parents of children in high school felt it was a serious problem that high…

A: Given: Hypothesized population proportion(p0)=0.52Number of parents in survey(n)=800Total parents…

Q: Explain the four steps involved in significance testing?

A: Hypothesis testing can be conducted in two ways: Critical value approach. P-value approach. The…

Q: Imagine a study comparing two groups:  undergrad vs. graduate students in terms of stress level. You…

A: It is provided that we have two independent groups and we have to compare them  in terms of stress…

Equations and Inequations

Equations and inequalities describe the relationship between two mathematical expressions.

Linear Functions

A linear function can just be a constant, or it can be the constant multiplied with the variable like x or y. If the variables are of the form, x2, x1/2 or y2 it is not linear. The exponent over the variables should always be 1.