An educational researcher claims that the average GPA of graduate students at FIU is less than 3.5 . To test his claim he collected data on 81 graduate students . The sample mean GPA was 3.25 with a standard deviation of 0.3 . What is the conclusion ?  Group of answer choices A.  Reject the null hypothesis B.  Type I error C.  Fail to reject the null hypothesis D.  Reject the alternative hypothesis

Q: A car insurance company claims that the average price of a new car is at least $17300. You randomly…

A: given data claim : μ ≥ 17300n = 40x¯ = 16412σ = 2360here populatrion sd is known so use z test.

Q: age re average Catholic in church on Sundays? The 56 randomly observed members of the Presbyterian…

A:

Q: The average salary for American college graduates is $45,900. You suspect that the average is…

A: Using excel formula for p value =T.DIST.2T(ABS(t), df)  t  = test static  df = degrees of freedom

Q: A company collects data on the lengths of telephone calls made by employees in two different…

A: For the sales division, the sample mean is 10.26 and the sample standard deviation is 8.56. For the…

Q: 6. A random sample of 22 lawn mowers was selected, and the motors were tes to see how many miles per…

A:

Q: State the null and alternative hypotheses for the following statement and the type of test being…

A: We know that the Null hypothesis is the hypothesis which is under test or which we want to claim…

Q: The mean IQ for the U.S. is 100 with a standard deviation of 15. A Troy statistics professor thinks…

A: Given,Population mean(μ)=100Population standard deviation(σ)=15

Q: The accounts of a corporation show that, on average, accounts payable are $125.32. An auditor…

A: From the provided information, the followings are obtained: The claimed population mean amount (in…

Q: The average high temperature for Atlanta in January is 53 degrees with a standard deviation of 8.2…

A: INTRODUCTION :  To measure the variability of which series is consistent than any other then the…

Q: A random sample of 21 pages is used to estimate the population variance of the number of…

A: The given sample size is 21, sample standard deviation is 5.11.

Q: The claim that statistics consultants have mean income of $90,000 is to be tested at a=0.05. A…

A: Solution Here we want to test that statistics consultants have mean income of $90,000 is to be…

Q: According to a magazine, people read an average of more than two books in a month. A survey of 20…

A: The given data is as follows:Sample size, Sample mean, Sample standard deviation,

Q: A travel association says that the mean daily lodging cost for a family traveling in North Carolina…

A: That is, the mean daily lodging cost for a family traveling in North Carolina is the same as…

Q: Automobile Insurance Premiums. Insure.com reports that the mean annual premium for automobile…

A: Given Information: Hypothesized value of population mean is 1365 Sample size n=25 Sample mean…

Q: 5. When 899 male workers were asked how many hours they worked in the previous week, the mean was…

A: As per our guidelines we are supposed total answer only 3 sub-parts of any questions so i am solving…

Q: ason claims the average price of a good gaming laptop is at least $500. You are not so sure, and you…

A: Here , One sample T test is applicable

Q: The average number of accidents at controlled intersections per year is 4.7. Is this average more…

A: Given: The average number of accidents controlled per year is 4.7. Let 'n' represents the number of…

Q: The average American college student watches three hours of YouTube per day. I want to know if…

A: 1) Since population sd is unknown, use one sample t test. 2) Two way ANOVA between subjects

Q: The average speed of a baseball line drive is 83 miles per hour. Josiah practiced a new technique to…

A: Given data is appropriate for testing of hypothesis to test z-test for single mean. Because it is a…

Q: You and a friend have several interesting hypotheses about the income of Arkansans. You then survey…

A: Given, μ = 45000s = 2500n = 100M = 50000     To find, A) Test this hypothesis at 10% level of…

Q: The mean number of eggs per person eaten in the United States is 253. Do college students eat more…

A: Sample sizes n= 64   Sample means X̄= 264   Sample standard deviation = 50.3

Q: The systolic blood pressure of adults in the USA is nearly normally distributed with a mean of 118…

A: Let X denote the systolic blood pressure of adults in the USA is nearly normally distributed with a…

Q: Zappos is an online retailer based in Nevada and employs 1,300 employees. One of their competitors,…

A:

Q: The systolic blood pressure of adults in the USA is nearly normally distributed with a mean of 120…

A:

Q: The systolic blood pressure of adults in the USA is nearly normally distributed with a mean of 118…

A: Given: Mean = 118, standard deviation = 19. The z follows standard normal distribution. X-μσ~N0,1

Q: The average number of accidents at controlled intersections per year is 4. Is this average a…

A: The random variable is number of accidents.We have to test whether the population mean number of…

Q: befor phones, a person made on rerage 2.8 phone calls per day. She believes that the number of Lone…

A: It is claimed that average of person made call on day is greater than 2.8. Hypotheses can be…

Q: According to the Census Bureau, 3.36 people reside in the typical American household. A sample of 27…

A: Population mean = ? = 3.36 Sample S.D = s =1.25 Sample size = n =27 Sample mean = x̅ = 2.7

Q: Determine if one-tailed test or two-tailed test fits the given alternative hypothesis. 1. The mean…

A: Hypothesis :  It is a statement about the parameter or statistical distribution that we have to…

Q: a. State the null and alternative hypotheses to be tested. List Type I and Type II error…

A:

Q: The mean number of eggs per person eaten in the United States is 266. Do college students eat a…

A: (a)   Determine the type of study.   The type of study is determined below as follows:   Since, the…

Q: 1. A survey asked the question "What do you think is the ideal number of children for a family to…

A:

Q: Kennedy High School reported that the mean score on an end of semester physics exam wass 508 with a…

A: Given, Mean score μ=508Standard deviation σ=121Sample size n=200

Q: An electrician wants to know whether batteries made by two manufacturers have significantly…

A: Denote μ1, μ2 as the population means voltage of batteries manufactured by Manufacturers A and B,…

Q: 4. Heights of Parents. A sociologist claims that women tend to marry men who are taller than…

A:

Q: what is the decision  2. What is the reason for the decision 3. state the conclusion

A: The null and alternative hypothesis will be: