please show all steps USING EXCEL ONLY FORMULAS a. Is the test​ two-tailed, left-tailed, or​ right-tailed? b. What is the test​ statistic?  c. What is the p-value? d) what is the null hypothesis and what do you conclude about it? e) Decide whether to reject the null hypothesis

Q: q16

A: Given : significance level of 5% For 600 tests, 5% of 600 will incorrectly find significance.

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A: Test is that whether Skill level in a subject is independent of location. Level of significance =…

Q: An airline company is interested in improving customer satisfaction rate from the 63% currently…

A:

Q: A security expert claims that at least 13% of all homeowners have a home security alarm. State Ho…

A: GivenA security expert claims that atleast 13% of all homeowners have homesecurity alarm

Q: a. Interpret the group means for lower- and upper-class respondents. Which attends church more…

A: a) For lower class, the mean is 2.99 which is approximately 3, it means that the lower class…

Q: Calculate the test-statistic using the following information. Round your answer to 2 decimal places.…

A: Given data We have given two samples.   1 2 µ µ1 µ2 n 45 25 X¯ 2.88…

Q: Suppose that, on average, U.S. adults get fast food 10 times a week. In a random sample of 41…

A: Comment: As per the our company guidelines we are supposed to answer only three subparts. Kindly…

Q: For the data presented below, use SPSS to conduct a Pearson r test to determine if a significant…

A: Introduction:Assume that the data are at least approximately normal.The null and alternate…

Q: has the proportion of adults who totaly abstain from alcohol changed? what is the zo= what is the p…

A: Given : x1= 440.0 n1= 1100 x2= 374.0 n2= 1100 significance level, 0.05

Q: A pre-med student in a statistics class has to do a statistics project. She plans to test the claim…

A: A pre-med student in a statistics class has to do a statistics project. She plans to test the claim…

Q: A baseball team claims that the mean length of its games is more than 2.2 hours. State Ho State the…

A: The answer is attached below,

Q: Determine the first step of hypothesis​ testing, and explain the procedure and logic of this step.…

A: Testing of Hypothesis: Testing of hypothesis is a rule which, when the sample values have been…

Q: The table below includes results from polygraph (lie detector) experiments conducted by researchers.…

A: Here,   Yes No Row Total Lied 19 43 62 Not lied 16 9 25 Column Total 35 52 Total=87…

Q: 2. Using the following information and do the following: Identify the p-value using the given test…

A: Given,α=0.05Test statistic(z)=1.00claim :P>0.3

Q: ek 9- Hypothesis Testing O Examples of null and alternative hypotheses that are one and two sided,…

A: As per the Bartleby guildlines we have to solve first question and rest can be  Given that…

Q: A baseball team claims that the mean length of its games is more than 2.6 hours. State H0 and Ha in…

A:

Q: State the null and alternative hypotheses. Report the test statistic and the p value. a. b. State…

A: Given that, a breakdown of 678 civil cases e originally tried in front of a judge and appealed by…

Q: While her husband spent 2½ hours picking out new speakers, a statistician decided to determine…

A:

Q: Given Ho: p2 80% and H p<80%, determine whether the hypothesis test is left- tailed, right-tailed,…

A:

Q: Hypothesis testing: For the following exercise, answer each question. State the null and alternate…

A:

Q: High levels of cholesterol in the blood are associated with a higher risk of heart attacks. Will…

A: x1= 56n1= 2051x2= 84n2= 2030significance level, 0.01

Q: The drawing below represents a right tail test where we reject the null hypothesis. Label each…

A: Given: The drawing represents a right-tailed test where we fail to reject the null hypothesis.

Q: The drawing below represents a right tail test where we fail to reject the null hypothesis. Label…

A: Given: The drawing represents a right-tailed test where we fail to reject the null hypothesis.

Q: For each research scenario below, indicate: which hypothesis test (z-score test, one-sample t-test,…

A: The choice of inferential test depends on different conditions.

Q: A home improvement company is interested in improving customer satisfaction rate from the 78%…

A:

Q: The test is done with a 95% confidence level. Find the test statistic, and p-value. (Round your test…

A: The test statistic and the p-value can be obtained from the given output.

Q: Marketers believe that 92% of adults in the United States own a cell phone. A cell phone…

A: For the given data perform z test for one proportion test

Q: Suppose you are conducting a test of independence.  What information would you need to calculate the…

A: Solution The researcher wants to conduct the test for independence.

Q: Identify the test statistic for this hypothesis test. The test statistic fc O A. -1.75 O B. -1.27 O…

A: p = 26/349 =0.075 n = 349 population proportion = 0.1

Q: The P-value for a hypothesis test is 0.083. For each of the following significance levels, decide…

A: Given that P value for the Hypothesis test = 0.083 P value = 0.083   We know that  P value ≤ α…

Q: A baseball team claims that the mean length of its games is more than 1.6 hours. State Ho and H₂ in…

A: Here Given  Claim is Mean length of game is more than 1.6 hours.

Q: baseball team claims that the mean length of its games is 1.6 hours. State H0 and Ha in words and in…

A: Null hypothesis can be defined as the hypothesis of no difference or equality, while the alternative…

Q: The null and alternate hypotheses are: He: T1 ≤ 1₂ H₂: T₂ > TT₂ A sample of 100 observations from…

A: sample size(n1)=100x1=70sample size(n2)=150x2=90significance level()=0.05The null and alternative…

Q: A coach uses a new technique to train gymnasts. Seven gymnasts were randomly selected and their…

A: Let X1 and X2 denote the competition scores of gymnasts before and after the training respectively.…

Q: An IO psychologist believes that layoffs in at a plant may have increased stress felt by the people…

A: Paired t test is applicable here.

Q: You are conducting a study to see if the proportion of women over 40 who regularly have mammograms…

A: In hypothesis testing, we use two different tails. They are one-tailed and two-tailed. There are two…

Q: Before 78 79 65 78 68 After 85 83 62 85 79

A:

Q: Salaries of Government Employees The mean salary of federal government employees on the General…

A: GivenMean(x)=58920standard deviation(σ)=1500sample size(n)=39significance level(α)=0.05

Q: If you had a test statistic of z = -3.14 and did a left tail test, what would the p-value be?   A.…

A: Given: Test statistic z= -3.14. Left tailed test.

Q: A. Test the claim that the contents of cans of diet soda have weights with a mean that is less than…

A: (a)Given that,mean(x)=0.78579standard deviation , s.d1=0.00448number(n1)=37y(mean)=0.81213standard…

Q: i need to know how to solve this

A: The provided information are:

Q: In this exercise, we are conducting many hypothesis tests to test a claim. Assume that the null…

A: Given: n=300 Significance level α=1%=0.01

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.