A doctor wants to estimate the mean HDL cholesterol of all​ 20- to​ 29-year-old females. How many subjects are needed to estimate the mean HDL cholesterol within 33 points with 99 %99% confidence assuming s equals 19.7s=19.7 based on earlier​ studies? Suppose the doctor would be content with 95 %95% confidence. How does the decrease in confidence affect the sample size​ required?

Q: he DASS-21 questionnaire is a validated measure of depression, anxiety, and stress. For the general…

A: Given that the mean for the anxiety for the population is 4.2 As it scales from the questions 0 to…

Q: A sample of n = 6 scores has a mean of M = 10. If one score with a value of X = 12 is removed from…

A: Given that  A sample of n = 6 scores has a mean of M = 10

Q: A dietician read in a survey that 85.36% of adults in the U.S. do not eat breakfast at least 3 days…

A:

Q: She would like to examine the mean SI score, p, for the population of all smokers. Previously…

A: NOTE: As only the first question is visible, I am attempting the first question only.   The null…

Q: A study found the lengths of daily driving time for people in your district are Normally distributed…

A: The mean is 35 minutes and the standard deviation is 3.

Q: Gay/lesbian Bisexual Heterosexual/Straight MG/L = 16 MBi = 17 MH/S = 22   Source SS df MS…

A: SSorientation=300,SSerror=2961There are three treatments and each treatment has 22…

Q: The average score for Indiana public school 6th graders on a standardized reading comprehension test…

A: The hypothesized mean is 75, the sample mean is 75.9 and the standard deviation is 5.

Q: Gay/lesbian Bisexual Heterosexual/Straight MG/L = 16 MBi = 17 MH/S = 22   Source SS df MS…

A: SSorientation=300,SSerror=2961There are three treatments and each treatment has 22…

Q: Hello. I appreciate any help. Thanks.

A: Standard Error of estimate:S=√MSEMean square error:The formula for the mean square error is,MSE =…

Q: wants to estimate the mean HDL cholesterol of all 20- to 29-year-old females. How many subjects are…

A:

Q: Gay/lesbian Bisexual Heterosexual/Straight MG/L = 16 MBi = 17 MH/S = 22   Source SS df MS…

A: SStreatment=300,SSerror=2961There are three treatments and each treatment has 22…

Q: You are asked to design a study to investigate the effectiveness of the Atkins diet (IV = diet, DV =…

A:

Q: A better drug? In a pilot study, a company's new cholesterol-reducing drug outperforms the currently…

A: Sample 1(current drug): n1=14x¯1=54.1s1=11.93 Sample 2(new drug): n2=15x¯2=68.7s2=13.3

Q: Calcium is essential to tree growth because it promotes the formation of wood and maintains cell…

A:

Q: The volumnes of soda in quart soda bottles can be described by a normal model with a mu of 32.3 oz…

A:

Q: A research study examined the effects of a new drug versus an old drug on hypertension. There were…

A: The objective of this question is to determine if there is a significant difference in the…

Q: If the t-statistic for a variable is -1.74, is the variable statistically significant?   No   Yes

A: If the t-statistic for a variable is -1.74, is the variable statistically significant? Explanation:…

Q: Life on other Planets Forty-two percent of people believe that there is life on other planets in the…

A:

Q: What is the F critical value?

A: Here the the groups are given as,Gay/lesbian,Bisexual or Heterosexual/straight.Let  are the…

Q: The sum of the squared deviation scores is SS = 20 for a sample of n = 6 scores. What is the…

A: The variance of the sample can be calculated as:

Q: A researcher wants to evaluate the effectiveness of a patch he thinks will significantly decreases…

A:

Q: What are the null hypothesis (H) and the alternative hypothesis (H) that should be used for the…

A: Given that mean SI score for the population of all smokers is 90. Test is that whether the value of…

Q: Does listening to heavy metal music while studying improve performance on the GRE?  A sample of 37…

A: Here, the sample size n is 37. The test statistic value (t) is given as 8.

Q: The DASS-21 questionnaire is a validated measure of depression, anxiety, and stress. For the general…

A: Hypothesis Ho: μ=4.2 vs H1: μ>4.2 test statistic=t=(x¯-μ)/s/n and df=n-1 When population…

Q: A college administrator wants to know if there is a significant difference between sexual…

A: Given,the data of different sex categories.sample size = 66 in total.To find the value of…

Q: Dr. S. compared her experimental group to a control group using a t test and concluded that her t…

A: Here Dr. S. compared her experimental group to a control group using a t-test. Hence the null and…

Q: A group of researchers wants to know whether men (population 1) are more likely than women…

A:

Q: /lesbian Bisexual Heterosexual/Straight MG/L = 16 MBi = 17 MH/S = 22   Source SS df MS F…

A: SStreatment=300,SSerror=2961There are three treatments and each treatment has 22…

Q: A doctor wants to estimate the mean trigliceride level of all 20- to 29-year-old females (in…

A: Given data  Margin of error (E) = 3  95% ci for μ. S = 17.1 n = ?

Q: In a test of significance, you can conclude there is a statistically significant relationship when:

A: The provided information is as follows:The objective of the given question is to determine when…

Q: The athletic director at a large university compared the proportions of freshmen (1st year students)…

A: The hypothesis is, Null hypothesis: H0: There is no difference between proportions of freshmen and…

Q: Rick took a test that is known to produce normally distributed grades with a mean of 72 and a SD of…

A:

Q: In the population of senior students at Shermer High School, the proportion who plan to attend…

A: From the provided information, Population proportion (p) = 0.64 Sample size (n) = 100 Sample…

Q: 6, 8, 9, 4, 3, 11, 4, 6, 5, 7   What is the dependent variable? What is the level of measurement…

A: Given that Let X denotes the number of hours spent studying per week  X~N(mu=4.40, b=2.32)   Data X:…

Q: A researcher conducts a study to investigate whether the obesity rate rural communities differ from…

A: Statistical hypothesis testing is an important method in inferential statistics. It is used to test…

Q: The percent of the population that is left-handed has historically been 10%. In a random sample of…

A: Solution: State the hypotheses Null hypothesis: That is, the per cent of the population that is…

Estimation

A new framework of data analysis where the new statistical methods are used for interpreting the results and analyzing the data is known as estimation in statistics.