4. A sample of male and female students were equipped with a device that records sound for one day. Data about number of words spoken per day are presented below: Males Females Mean 16177 16569 Standard 7520 9108 Deviation Construct a 99% confidence interval for the difference in the mean number of words spoken by males and females. Using this confidence interval, can you support the claim that females talk more than males? Assume the population variances to be unknown and unequal.

Q: Describe the procedures for obtaining a random sample. step by step

A:

Q: a coin is tossed repeatedly until a head comes up. Find sample space.

A: If a coin is tossed then we get Head (H) or Tail (T) Sample space for 1 coin tossed : {H,T} But here…

Q: What sampling method was used?

A: 100 students was required to estimate the mean achievement in research of graduatestudents. The…

Q: Sampling to determine the total number of samples per group from 6,000 male and 2,000 female. (Use…

A: The provided information is The total population is  N=6000+2000=8000 The margin of error is  e=0.05…

Q: Define random sample. Explain why this is important in design of experiments.

A: A random sample is a sample that is obtained by selecting the sample points randomly without any…

Q: Sample size is larger if

A: Sample size is large if we can make statement for population from it.

Q: How do the Boundaries for the observed sample, Common and Rare Outcomes?

A:

Q: isn't the sample size should be 35, not 12?

A: We have given that the information presented by the tutorial school related to the IELTS  mock…

Q: What sampling technique was used?

A: here use definition of sampling method

Q: What is the formula to be used to determine the total possible random samples?

A: Let the population size be N Sample size be n

Q: Among the random and non-random sampling techniques that we have, which do you think is the most…

A: Random/Probability sampling is a technique in which each member of the population has an equal and…

Q: how to calculate sampling weight

A: Sampling is a part of our day-to-day life which we use advertantly or inadvertantly . For instance a…

Q: A smaller sample size will cause the margin of error to decrease. True False ONLY If false, change…

A: Given problem Given that   A smaller sample size will cause the margin of error to decrease.  Ans)…

Q: Describe about the types of sampling.

A: In simple random sampling, each of the unit is population has equal chance of being selected in the…

Q: Describe about the Selection of Sample Size.

A: Sample size It is difficult for researchers to examine each individual in the population. Hence, a…

Q: Explain one possible advantage of using a paired sample instead of independent samples.

A: Paired samples, are also known as dependent samples, can be defined as the samples in which natural…

Q: A balance used in an entomology lab to weigh grasshoppers is quite old and has been used for…

A:

Q: ANOVA df Regression 1 Residual 148 Total 149

A: we know that in the regression analysis the degrees of freedom for total is n-1 where n is the…

Q: What test can we use to determine the sample size needed?

A: Confidence intervals for a parameter take the following general form: Point Estimate ± Margin of…

Q: rowing team consists of three rowers who weigh 42, 36 and 29 pounds. Find all possible random…

A: The possible samples with 42,36 and 29 with replacement of size 3 is, X1  X2 X3 sum= X1+X2+X3…

Q: Describe the sampling distribution of the difference between two sample means when large samples are…

A: Sampling Distribution: The sampling distribution of the difference between Two mean shows The…

Q: ppose that 97% of Monarch butterflies migrate to Mexico in winter. What is the smallest sample size…

A: Given data, 97% of Monarch butterflies migrate to Mexico in winter p=97%=0.97 What is the smallest…

Q: Two dies are rolled and the numbers of dots on the two dies are multiplied. Create a table showing…

A: Solution: Suppose two dice are rolled. Then, the sample space is

Q: ethod? Select all that apply

A: Sampling Methods: The sampling methods are classified into 2 types  Random Sampling or…

Q: Describe the large sample test procedure to test the equality of two proportions.

A: FOR LARGE SAMPLE SIZE WE SHOULD USE Z TEST AND DETAILED PROCEDURE IS GIVEN IN THE SECOND STEP.

Q: A mobile manufacturing company has decided to purchase the mobile batteries from a battery…

A: Given: n=25 Probability of acceptance p1=0.05 Probability of rejection p2=0.2

Q: Describe about the All Possible Random Samples.

A: The random samples can be selected in the following methods: Simple random sampling: If a sample of…

Q: how do you find the simple random sample of 15 restaurants?

A: In simple random sampling each member of the population has an equal chance of being included in the…

Q: Is the sample size of survey is multiplied by 100, then by what factor is the margin of error…

A: Solution

Q: A university has 30,000 undergraduate and 10,000 graduate students. A survey of student opinion…

A:

Q: How do a paired-sample design and an independent-sample design differ?

A: A paired-sample design and an independent-sample design are two different types of research designs…

Q: A population consist of numbers 3,6,9,12, and 20 and the sample size n=3 (apply the 8 steps ,upload…

A: Population Numbers are 3 6 9 12 20 From the given population samples are prepared with size 3…

Q: explain why two parameters are used in a two sample test

A: Here in the two parameters we take in two sample t-test because, we take samples from two…

Q: Determine the sampling methods used in each of the scenarios below iv. Select 8 white cars, 5 blue…

A: Stratified sampling: It is a sampling method in which the entire population is divided into…

Q: An electronics manufacturer test every 300th cell phone to verify that it is functioning properly.…

A: It is an important part of statistics . It is widely used.

Q: What is the Importance of Equal Sample Sizes?

A: The t-test and ANOVA assume that the sample sizes are equal. There is an importance that the two…

Q: What are the practical Reasons for learning how to use the formula in determining sample size?

A: The two major factors affecting the power of a study are the sample size and the effect size A…