A researcher is interested in determining if there is a significant difference in number of hours of studying in a week between male and female undergraduate students. 15 randomly selected males and 15 randomly selected females from across all majors were used in the study. The mean for females was determined to be 10 hours with a standard deviation of 2.5 hours and the mean for males was determined to be 7.25 with a standard deviation of 2.25 hours. Using an alpha of .05 is there enough evidence that females study on average more than males?? a. Write the hypotheses for this scenario.  b. Is this one tailed or two tailed?                       i. Why?  c. What statistical test would be used for this scenario?                        i. Explain why.

Q: A researcher wants to test the claim that convicted burglars spend an average of 18.7 months in…

A: Null hypothesis: µ=18.7. Alternative hypothesis: µ≠18.7. This is a two-tailed test. Here, the sample…

Q: In one region of the Caribbean Sea, daily water temperatures are normally distributed with a mean of…

A: It is given that the mean is 77.9 and standard deviation is 2.4.

Q: An article in the local paper about salaries showed that staff nurses in San Antonio earn less than…

A: From the provided information, Level of significance = 0.01

Q: An automobile manufacturer decides to carry out a fuel efficiency test to determine if it can…

A: Given For previous model  Sample size=n1=6, sample mean x̄1=29.5, standard deviations s1=1.41  For…

Q: The Dodge Reports are used by many companies in the construction field to estimate the time required…

A: We have given thatGiven sample mean (x̄) = 10.3 hoursPopulation mean (μ) = 9 hoursSample standard…

Q: In a random sample of 23 private school teachers in queens county the average teaching experience is…

A:

Q: A researcher was interested in comparing the resting pulse rate of people who exercise regularly and…

A: T-test for difference of mean:                                    test statistic is:…

Q: The Dodge Reports are used by many companies in the construction field to estimate the time required…

A: The sample mean is 10.3 and the standard deviation is 4.2.The hypothesized mean is 9.The sample size…

Q: State the null hypothesis H0 and the alternative hypothesis H1. b. Find the value of the test…

A: Given Data : For first group x̄1 = 163.0 s1 = 9.0 n1 = 8 For second…

Q: A particular brand of tires claims that its deluxe tire averages at least 55,000 miles before it…

A: Given :

Q: Acid rain has caused many lakes around the world to become acidic and can have a negative impact on…

A: The null hypothesis : H0:μ=6 And the alternative hypothesis : HA:μ>6

Q: According to a survey, working men reported doing 62.7 minutes of household chores a day, while…

A: The sample statistics for all men and all women who spend time doing household chores are given…

Q: The town of Know WearSpatial, U.S.A. operates a rubbish waste disposal facility that is overloaded…

A: Normal distribution is a continuous distribution which has many real life applications. Normal curve…

Q: A computer software vendor claims that a new version of its operating system will crash fewer than…

A: From the given information, the sample size is 41.

Q: A tire company finds the lifespan for one brand of its tires is normally distributed with a mean of…

A: Solution: Let X be the lifespan for one brand of its tires is normally distributed with a mean of…

Q: A randomized controlled trial is run to evaluate the effectiveness of a new drug for asthma in…

A: Let the random variables are as:X1: New drugX2: Placebo

Q: An educator has developed a program to improve math scores on the Texas STAAR test. The average…

A: The sample size n is 30.

Q: A children’s clothing company sells hand-smocked dresses for girls. The length of one particular…

A:

Q: A study was conducted to determine the efficacy of an oral antidiabetic drug. Patients were given a…

A:

Q: A paper reported that the freshman year weight gain for the students in a representative sample of…

A:

Q: Are severe psychiatric disorders related to biological factors that can be physically observed? One…

A: Solution: Given information: n1=10 Sample size of patients with obsessivecompulsive disordersn2=10…

Q: A medical investigation claims that the average number of infections per week at a hospital in Town…

A: Solution-: Given: x¯=17.7,μ0=16.3,n=40,s=1.8,α=0.05 Claim: The average number of infections per week…

Q: A company wants to test a new medicine for its effectiveness in treating ulcers. They take an srs of…

A: Given data: x1¯=6.8s1=1.2n1=500x2¯=8.2s2=1.6n2=500

Q: An educator has developed a program to improve math scores on the Texas STAAR test. The average…

A:

Q: A consumer group tested a sample of 100 light bulbs. It found that the mean life expectancy of the…

A: given data  n = 100x¯ = 936 hourss = 87 hoursZ score  = 1.56lifespan of bulb (X) = ?

Q: Is there any difference in the variability in golf scores for players on a women's professional golf…

A: Given: For the two samples of women and men respectively, we are given           Sample size:   n1 =…

Q: A travel agent prices their best-selling tour package on the basis of the costs associated with…

A: Given data : sample size, n =15 sample mean, x̄ = 2174.67 sample standard…

Q: The town of KnowWearSpatial, U.S.A. operates a rubbish waste disposal facility that is overloaded if…

A: Given data normal diaatributionμ = 26.88 lbσ = 12.74 lbn = 5028over load if x¯ >27.37

Q: r feels that the mean hospital stay in 2002 should be less due to initiatives aimed at reducing…

A: We are given: μ=Population mean=7.1x¯=Sample mean=6.85s=Sample standard devitaion=7.01n=Sample…

Q: Location is known to affect the number, of a particular item, sold by an auto parts facility. Two…

A: GivenFor Location A:-sample size(n1)=13Mean(x1)=39standard deviation(s1)=8For Location B:-sample…

Q: A children’s clothing company sells hand-smocked dresses. The length of one particular size of dress…

A: From the provided information, Sample size (n) = 18 Sample mean (x̄) = 34.24 Sample standard…

Q: The town of KnowWearSpatial, U.S.A. operates a rubbish waste disposal facility that is overloaded if…

A: Solution: Let X be the weight. From the given information, X follows normal distribution with mean…

Q: s = $7.61. At 1% significance level, do the data provide sufficient evidence to conclude that this…

A: HERE GIVEN, A company collects information about retail prices of history books. During the year…

Q: A survey found that​ women's heights are normally distributed with mean 62.2in. and standard…

A: Men mean =67.7 s = 3.5

Q: Location is known to affect the number, of a particular item, sold by HEB Pantry. Two different…

A: given data x¯1  =  39s1 = 9n1 = 18x¯2  = 55s2 = 6n2 = 18α = 0.01claim : μ1 > μ2

Q: An ambulance service located at the edge of town is responsible for serving a large office building…

A: It is given that: For the route A:  x¯=5.9sx=1.4n1=5 For the route B, y¯=4.2sy=1.8n2=6

Q: The Dodge Reports are used by many companies in the construction field to estimate the time required…

A: The objective of this question is to conduct a hypothesis test to determine if the time required to…

Q: An educator has developed a program to improve math scores on the Texas STAAR test. The average…

A: To test:H0:μ=1472H1:μ≠1472

Q: The mean number of English courses taken in a two-year time period by male and female college…

A:

Q: O Alternative hypothesis states: female population variance > a. male population variance O…

A: As per our guidelines , we are allowed to answer three sub-parts Let X1 be the length of the male…

Q: Many cheeses are produced in the shape of a wheel. Because of the differences in consistency between…

A: