Decide whether the following scenarios are example of type 1 error or type 2 error or neither?  Use the traditional 0.05 cut-off for statistical significance.  A study was conducted to determine whether workers exposed to benzene were more likely to get leukemia compared to other workers. In reality, benzene does cause leukemia. The study finds that 4% of workers exposed to benzene developed leukemia, while only 1% of other workers developed leukemia. The p-value for these differences was 0.02.        Type 1 error     Type 2 error      Neither

Q: Range anxiety is one of the reasons consumers are reluctant to switch to an electric vehicle, and…

A: Given information: x 89 90 91.5 92 92.5 95 95.5 96 93 93.5 94 94 91…

Q: After a sample of n = 25 high school students took a special training course, their SAT scores…

A: a. Let μD be the population mean difference, the test is that the training course has a significant…

Q: nificant level 0.05, what is the correct interpretation? A. at 10% there is not sufficient evidence…

A: Let D be the difference between such that D = Before – After μD : Represent the mean of difference…

Q: 3. Ultrasound can be used to diagnose acute appendicitis in patients fronting with abdominal pain.…

A: Given information: Ultrasound can be used to identify cases of appendicitis. In a study of the use…

Q: 7. For the preceding problem you should find that there are significant differences among the three…

A:

Q: A doctor compares three treatments for arthritis. He uses three samples, each of size six, in the…

A: We have given that  Three treatment  and each treatment having six size .

Q: Suppose you carry out a significance test of H0: μ = 8 versus Ha: μ > 8 based on sample size n = 25…

A: Given that µ = 8 n = 25 df = n-1 = 25-1= 24

Q: Recall that small effects may be statistically significant if the samples are large. A study of…

A: Sample sizes n1=104 , n2=46 Favorable cases x1=13 , x2=8 NOTE:- According to bartleby guidelines…

Q: Data from the Motor Vehicle Department indicate that 80% of all licensed drivers are older than age…

A: (A). Propose the suitable analysis: Denote the proportion of licensed drivers who are older than 25…

Q: The US Department of Energy reported that 52% of homes were heated by natural gas. A random sample…

A: Given Information: 52% of homes were heated by natural gas. Sample size n=334 Out of which x=130…

Q: 2. Some scientists believe that the presence of antibody to milk protein lowers the chance of…

A: From the given data Select the correct choice

Q: In a random sample of males, it was found that 18 write with their left hands and 215 do not. In a…

A: Given Let sample 1 be of males and sample 2 be of females. No. of females who write with left hands,…

Q: may developed this program supplied materials and teacher training for a large-scale test involving…

A: The null hypothesis is rejected with a p-value of 0.028The failing percentage of tests reduced from…

Q: What is the p-value if you are doing a two-tailed test?

A: We have given that  The z-statistic is, z = 1.15

Q: Based on that reported p-value and using the common definition of statistical significance, which of…

A: Let  be the two population mean salaries for blue-eyed people and brown-eyed people.Given…

Q: When comparing more than two treatment means, should you use an analysis of variance rather than…

A:

Q: A study of seat belt users and nonusers yielded the randomly selected sample data summarized in the…

A:

Q: Given sensitivity is 0.88, specificity is 0.95, and prevalence is 0.07, find the positive predictive…

A: It is required to find the positive predictive value, and negative predictive value, using…

Q: A hospital reported that the normal death rate for patients with extensive burns (more than 40% of…

A: Given information- Sample size, n = 92 Sample proportion is- Hypothesis Formulation-…

Q: 2.Suppose that a recent study found that farmers exposed to heavy amounts of Roundup (a chemical…

A:

Q: For a repeated-measures study, a small variance for the difference scores indicates that the…

A:

Q: An RA at the University of Baltimore has concluded that the difference between the mean GPA scores…

A: Type 1 error : - We we reject the true Null Hypothesis Type 2 error : - When we accept the false…

Q: A researcher wants to know whether athletic men are more flexible than nonathletic men. For this…

A: The given sample size for athletic men is 50, sample mean is 4.3, sample standard deviation is 2.1,…

Q: A group of researchers wants to examine whether a medical treatment affects people’s sleeping hours.…

A: Assume, μ  be the population mean hours of sleep of individuals under treatment. x be the sample…

Q: For a sample of n=36 that has a variance of 1296, what is the estimated standard error for the…

A: Given: Sample size (n)= 36 Variance = 1296

Q: A repeated-measures related samples study is used to compare two treatments with a sample of n=4…

A: The sample standard deviation for the set of difference scores is, sd=SSn-1=484-1=16=4 The sample…

Q: A researcher wants to know if athletic women are more flexible than non-athletic women. For this…

A: From the provided information,

Q: Which of the following experiments uses independent samples? O You want to test whether a sample of…

A: The objective is to identify the independent experiments uses independent samples.

Q: A nutrition expert claims that the average American is overweight: To test his claim, a random…

A: A. Consider μ is the population average difference of actual weight and ideal weight.

Q: If a treatment is expected to decrease scores on a variable for which the mean is expecte

A: From the given information, If a treatment is expected to decrease scores on a variable. The mean is…

Q: Do political science classes require more writing than history classes? The 57 randomly selected…

A: State the hypotheses. That is, there is no evidence to conclude that on an average political…

Q: icle in the San Jose Mercury News stated that students in the California state university system…

A: Given that  Sample size n =60 Sample mean=4.9 Standard deviation=0.8

Q: Subjects SPECIMEN 1 3 4 5 7 8. Method 1 1.2 1.3 1.5 1.4 1.7 1.8 1.4 1.3 Method 2 1.4 1.7 1.5 1.3 2.0…

A: There is always some contention about the value of a parameter or the relationship between…

Q: you compute a two-sample z statistic and it comes out to equal 1.6. What is the p-value if you are…

A: Given Information: The two-sample z statistic is given as 1.6. The test is two tailed

Q: You conduct a statistical study in order to test whether a new training program has led to any…

A: Given, You conduct a statistical study in order to test whether a new training program has led to…

Q: A researcher claims that the amounts of acetaminophen in a certain brand of cold tablets have a mean…

A: Given: n = 29 x¯ = 597.9 s = 3.8 α = 0.01

Q: From previous studies, it is concluded that 15% of people support stricter gun laws. A researcher…

A: H0 : p =0.15       H1 : p <0.15       Population proportion = p₀ = 0.15 Sample number of…

Q: A study was carried out to evaluate the safety of motorcycle helmets. 40 randomly selected helmets…

A: Solution:-To determine the confidence with which the study can claim that the proportion of all…

Q: Kenneth, a competitor in cup stacking, claims that his average stacking time is 8.2 seconds. During…

A: Note:The given calculated values can be used to draw the conclusion.

Q: In a random sample of​ males, it was found that 25 write with their left hands and 217 do not. In a…

A: Given that  For males  Total sample size n1=25+217                                      =242 For…

Confidence Intervals

When we calculate intervals in probability and statistics, it can be simply termed as finding out a confidence interval. The confidence interval is usually calculated from the data set which is observed. The value of the parameter that needs to be calculated is present here only.