The critical boundaries for a hypothesis test are z = +1.96 and -1.96. If the z-score for the sample data is z =-1.90, what is the correct statistical decision?​   Question  options: a. ​Reject H1 b. ​Fail to reject H1 c. ​Fail to reject H0 d. ​Reject H0

Q: 2. Researchers wanted to compare the effectiveness of three diet plans. 78 subjects were randomly…

A: VariableDietSample sizeMeanSt DevWeight LossA242.8831.507B273.0262.523C275.1482.396

Q: If you wish to test the claim that the mean of the population is 100, the appropriate null…

A: Given that If you wish to test the claim that the mean of the population is 100. Note:- The null…

Q: What is stated by the alternative hypothesis (H1) for an ANOVA? Explain. a. There are no…

A: ANOVA in statistics is the technique which is used to compare the population means when the number…

Q: The choice of performing a one-tailed or two-tailed test depends on       A. Alternative hypothesis…

A:

Q: Only about 15% of all people can wiggle their ears. Is this percent higher for millionaires? Of the…

A: The p is the proportion of people who can wiggle their ear The hypothesized proportion  p=0.15 The…

Q: Which of these best describes the conclusion we could make using a 5% level of significance? Select…

A: The decision in the hypothesis testing can be made using two important methods. They are the p-value…

Q: State the null and alternative hypotheses for the following  The data file contains four taste…

A: We have to define H0 and H1 for this problem

Q: Suppose IQ scores were obtained for 20 randomly selected sets of couples. The 20 pairs of…

A: n = 20 x¯ = 101.52y¯ = 101.1r = 0.850p value = 0.000regression equation : y^ = 8.69+0.91xfor x = 90…

Q: If the P-value is 0.003 and the level of significance , , is 0.05 in a hypothesis test for a mean,…

A: Given,p-value =0.003and  level of significance(α)=0.05

Q: If sample data is such that for a one-tailed test of u you can reject H, at the 1% level of…

A: Given:  1) The level of significance is α=0.01. 2) The test is one tailed. 3) The null hypothesis…

Q: Test the claim that the proportion of people who own cats is significantly different than 20% at the…

A: Given that  Sample size: n =400 Sample proportion: p^=0.12 Population proportion: P=0.20 Level of…

Q: d. The p-value = 0.4238 x (Please show your answer to 4 decimal places.) e. The p-value is sa f.…

A: GIVEN DATA, claim:p>0.56x=170n=278p^=xn=170278=0.6115here we have to find out the p-value for the…

Q: The z for a sample mean hypothesis test compares a sample mean to another mean. In these situations,…

A: From the above data We are given that the The z for a sample mean hypothesis test compares a…

Q: Q 1.8:   Four testing agencies are going to test whether a medication causes nausea in patients. All…

A: 1.8   From the given information, the four agencies are testing whether the medication causes nausea…

Q: If r = 0.7 for the probability and statistics course grades of 30 students, construct a 95%…

A: Confidence interval for correlation coefficient is given by,

Q: 11% of all Americans suffer from sleep apnea. A researcher suspects that a lower percentage of those…

A: We have given that the hypothetical proportion p0=0.11, sample size n=317 and favourable number of…

Q: The accompanying table contains the data for the amounts (in oz) in cans of a certain soda. The cans…

A: Given Alpha=0.01 Median=20 oz n=36

Q: Test the claim that the proportion of men who own cats is significantly different than 45% at the…

A: Solution: Let X be number of men owned cats and n be the sample number of men. From the given…

Q: 2. 10% of all college students volunteer their time. Is the percentage of college students who are…

A: As per our guidelines, we can solve only the first three subparts, Kindly repost the others for…

Q: Choose the correct answer: We would like to test the hypothesis that p= 0.5 versus the alternative…

A: we have to find p value....

Q: 1. Let X andY have joint pmf given in the table below: Y 1 2 3 4 1 0.05 0.05 0.05 2 0.05 0.10 0.15…

A: Given

Q: Select the most appropriate response. Five years ago, a survey found that the proportion of city…

A: Solution:  The null and alternative hypotheses are:

Q: Suppose you take a sample of 25 Reese's pieces. The proportion of orange is 0.55. What is the…

A:

Q: Using the 8 steps of hypothesis testing, determine whether there is a significant impact of being in…

A: Given information Sample mean x̅ = 27 Population mean µ = 30 Sample size = 100 Standard deviation σ…

Q: Decide whether the following scenarios are example of type 1 error or type 2 error or neither? Use…

A: Explanation: The investigator is specifically interested to test whether the mean weight of babies…

Q: An online magazine article reported that US adults spend an average of $50 on birthday gifts for…

A: The smallest level of significance at which the null hypothesis is rejected is given by the p-value.

Q: A psychiatrist is interested in finding a 98% confidence interval for the tics per hour exhibited by…

A:

Q: Would you favor spending more federal tax money on the arts? Of a random sample of n1 = 236 women,…

A: From the provided information,

Q: None

A: Comparing Parameters of Two Populations: A Practical ScenarioIn many real-world situations,…

Q: In a fishing lodge brochure, the lodge advertises that 75% of its guests catch northern pike over 20…

A: Given that, In a fishing lodge brochure, the lodge advertises that 75% of its guests catch northern…

Q: steep aphea. live in the inner city have sleep apnea. Of the 317 people from the inner city…

A: An experiment is conducted and the test statistics and p value are given here. g)  The second…

Q: Round to the fourth as needed Requirements (part 1):       Requirements (part 2):       H0H0:…

A: Here one sample proportion test( tow tail z test of proportion )

Q: 879, P-vaIue Suppose IQ scores were obtained for 20 randomly selected sets of couples. The 20 pairs…

A: For the best predicted value, first we will see whether the two variables (x and y) are…

Q: For an independent-samples t-test, what is the effect of increasing the number of scores in the…

A: Answer: For an independent samples t test, By increasing the number of scores in the samples will…

Q: A restaurant owner claims that the mean amount spent by diners at his restaurant is more than $30.…

A: Solution: The claim is that the mean amount spent by diners at his restaurant is more than $30.…

Q: The mayoral challenger claims that less than 30% of residents over the age of 25 have bachelor’s…

A:

Q: Can you conclude that the proportion of boys who are overweight differs from the proportion of girls…

A: Here use  proportion test for 2 sample

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.