1..The null hypothesis of Ho is?  2.The alternative hypothesis is?  3.The test to be used is-

Q: The mean number of sick days per employee taken last year by all employees of a large city was 10.6…

A: From question we can say that, Null Hypothesis: H0: u=10.6 Alternative Hypothesis Ha: u≠10.6

Q: The mean length of lumber is supposed to be 8.5 feet. A builder wants to check wehther the shipment…

A: The hypothesized mean is 8.5.

Q: he sample mean for a recent introductory psychology test was 78, and the standard deviation was 3.…

A: Given Information: Mean = 78 Standard deviation = 3 Student received a score of 82 i.e., X = 82…

Q: A national achievement test is administered annually to 3rd graders. The test has a mean score of 80…

A: A national achievement test is administered annually to 3rd graders. The test has a mean score of 80…

Q: The mean age of De Anza College students in a previous term was 26.6 years old. An instructor thinks…

A: State the hypotheses That is, there is no evidence that the mean age for online students is older…

Q: Consider a sample with a mean of 500 and a standard deviation of 100. What are the z-scores for the…

A:

Q: The manufacturer claims that your new car gets 34 mpg on the highway. You suspect that the mpg is a…

A: Given data : sample size, n =58 sample mean, x̄ = 30.8 sample standard…

Q: From the scores in subject statistics for 8 students, it was found that the mean score is 73 and the…

A: We have given that,  Sample mean (x̄) = 73,  standard deviation (s) = 5.15 and sample size (n) = 8…

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

A: Given that, An experiment is conducted and data are collected from 26 males and 20 females. The…

Q: Length of Time to Sell a Home. According to the the National Association of Realtors, it took an…

A: Given,sample size(n)=40sample mean(x¯)=3.6sample standard deviation(S)=2population mean(μ)=3α=0.05…

Q: ... Since the z score for the tallest man is z = and the z score for the shortest man is z = | , the…

A: The tallest living man at one time had a height of 238 cm. The shortest living man at that time had…

Q: The article referenced says that when women aged 25-34 binge drink they have on average 6.7 drinks.…

A:

Q: The mean ACT score for 43 male high school students is 21.1 and the standard deviation is 5.0. The…

A: Given : Claim : Male and female high school students have equal ACT score averages.

Q: A Industrial Psychology test was written. From a sample of 50 students and it was found that the…

A:

Q: Suppose you are conducting a hypothesis test to determine whether the mean of a normal population is…

A: Given The data is as follows: Sample size, n=100 Sample mean, x¯=29 Sample standard deviation, s=5…

Q: The registrar would like to conduct a hypothesis test. The level chosen for the test will be  = 0.10

A: Given, x=2.34μ=2.53σ=1.04n = 100

Q: The manufacturer claims that your new car gets 24 mpg on the highway. You suspect that the mpg…

A: Null Hypothesis: A hypothesis which is tested for plausible rejection is called the Null Hypothesis…

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: At a large university, data were collected on the number of sisters and brothers that each student…

A: The objective of the question is to find the mean of the distribution of the sum of two random…

Q: Suppose that you randomly survey death records for people born in 1900 in Louisiana and compared the…

A:

Q: From a random sample of 64 high school seniors, the sample mean and standard deviation of the math…

A: Given,mean(x)=90standard deviation(s)=7sample size(n)=64α=1-0.92=0.08α2 =0.04degrees of freedom…

Q: Students in the senior capstone course (N=36) at Central State University took the Political Science…

A: 1.   Suppose μ is the true mean scores.

Q: A random sample of 49 cans of soda is obtained and the contents are measured. The sample mean is…

A: From  given data we have : mean x=12.01 the standard deviation s=0.13 n=49

Q: You are a manager of a building that hosts the local farmers market for a town. You want to…

A: Given,sample size(n)=17sample mean(x¯)=2110standard deviation(s)=114.03

Q: John finds that there is a scholarship available to all persons scoring in the top 5 % on the ACT…

A:

Q: A teacher says that the top 20​% of the class received an A on the last test. The scores were…

A: Obtain the minimum score required to get on A. The minimum score needed to get A and the top 20% of…

Q: Do you prefer taking tests on paper or online? A college instructor gave identical tests to two…

A: It is assumed that the population variances are equal. The null and alternative hypotheses are…

Q: The average breaking strength of the steel rods is specified to be 18.5 thousand pounds. To test…

A: To test:H0:μ=18.5H1:μ≠18.5

Q: A school psychologist was above or below the mean grade point average (GPA) at her school. She…

A: The overall average GPA is 2.55 Population standard deviation σ=0.5 Sample size n=30 Sample mean…

Q: We measure the heights of 57 students and obtain a sample mean of 67 inches and a sample standard…

A: Given information- Sample size, n = 57 Sample mean, x-bar = 67 inches Sample standard deviation (s)…

Q: The manager at a drive through has implemented a new process and wants to check if the new drive…

A:

Q: A college instructor gave identical tests to two randomly sampled groups of 50 students. One group…

A: From the provided information, n1=50x1=75.0s1=12.5n2=50x2=78.0s2=14.0