17. For the previous problem, the value of the test statistic is -1.98. Find the corresponding p-value. (a) 0.9522 (b) 0.4761 (c) 0.0239 (d) 0.0478

Q: what will be the value of X at the z score =-3 given, mean=10 and standard deviation =2?

A: The z-score of a random variable X is defined as follows: z = (X – µ)/σ. Here, µ and σ  are the mean…

Q: Suppose that a national poll of 300 registered Republicans was conducted this week and 165 stated…

A: Given that  n=300 , X=165

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

A: Given: Test statistic is -1.74

Q: What is the z score for 20 if mean =28 and stadnard deviation =6

A: The z-score of a random variable x is defined as follows: z = (x – µ)/σ. Here, µ and σ are the mean…

Q: A process control engineer wishes to estimate the true proportion of defective computer chips by…

A: Given: margin of error Me = 0.0001 Confidence level = 90% Significance level α = 1-0.90 = 0.10 True…

Q: One sample has n = 6 and M = 10. A second sample has n = 4 scores with M = 15. If the two samples…

A: Combined mean = n1x1¯+n2x2¯n1+n2

Q: what will be the value of X at the z score =-2.5 given, mean=45 and standard deviation =5?

A: Mean = 45 Standard deviation = 5  Z score =-2.5 We have to find X score  for given data...

Q: The mean ±1 sd of ln [calcium intake (mg)] among 25 females, 12 to 14 years of age, below the…

A: To find the appropriate test for a significant difference in means between two group one should do…

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: 2. What should you do if the p-value is low?

A: We know that, a P-value is a statistical measurement used to validate a hypothesis against observed…

Q: If you want to be99​% confident of estimating the population proportion to within a sampling error…

A: Proportion is almost similar to the concept of probability. Proportion is a fraction of the…

Q: Can you statistically put that something is within the 100th percentile? For examlpe a z-score of…

A: 100th percentile means that you have the highest test score possible. 100th percentile means you've…

Q: What is the margin of error for a 99% CI for a mean, when the sample size is 12, the sample average…

A: Given: Sample size, n = 12 Sample mean, x = 52 Sample standard deviation, s = 13 It follows a…

Q: The data for an independent –measures research study produced a sample mean difference of 6 points…

A: Following information is given:

Q: that the mean score of these 53 students is 147.9. Is this significantly different from the national…

A: Given: Sample size, n = 53 Mean,  Population mean,  standard deviation,

Q: A score that is 3 points lower than the sample mean has a z-score of z = -0.25, and a score of X =…

A: Given information: Case-1: z = -0.25  Score (X) = u-3  Sample mean (u) = u  Case-2: z = -0.75  X =…

Q: If you want to be 99% confident of estimating the population mean to within a sampling error of ±20…

A:

Q: 17. What is the z-score that corresponds to P = 0.9131?

A: Solution: 17) Let Z be the standard normal variable with mean μ=0 and standard deviation σ=1.…

Q: If you want to be 95​% confident of estimating the population proportion to within a sampling error…

A: z-critical value at alpha(0.95) = 1.96 margin of error =0.08   p = 0.5

Q: A new quality-inspection program is being tested to see if it will reduce the proportion of parts…

A: A sample of 200 parts that passed inspection under the new program and the number of defectives will…

Q: If you want to be 95% confident of estimating the population proportion to within a sampling error…

A:

Q: We want to test if the percentage of cash users in purchases is greater than 30. Determine the…

A: The hypothesized proportion is 0.30.

Q: Samuel Morse determined that the percentage of a's in the English language in the 1800s was 8%. A…

A: Denote p as the true proportion of a’s in modern newspaper. It is reported that proportion of a’s in…

Q: If you want to be 95​% confident of estimating the population proportion to within a sampling error…

A:

Q: A population of N = 6 scores has ΣX = 42. What is the population mean?

A: Given ,Population of N=6 scoresand Σx =42

Q: If you want to be 99% sure confident of estimating the population mean to within a sampling error of…

A: The critical value from the standard normal table at 99% confidence level is,

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: A substance abuse counselor wants to demonstrate the effect of situational stress on alcohol…

A: Introduction: Denote μ1, μ2 as the true mean measures of alcohol rating, as given by the group of…

Q: Suppose that an anxiety measure has a mean of 106 and SD of 20. The researcher only wants to work…

A:

Q: By how many times does the sample size have to be increased to decrease the margin of error by a…

A: Margin of Error- In the theory of probability and statistics, there is a inverse relation between…

Q: If you want to be 95% confident of estimating the population proportion to within a sampling error…

A: Obtain the sample size of a preliminary estimate for p with 0.40. The formula of sample size is,…

Q: me in male firefighters and you’ve decided to use the sample mean, ?̅, as the estimator. Explain why…

A: The sample mean refers to a statistic obtained by computing the arithmetic average of the values of…

Q: 8. Use the figure to the right, which shows the percentages of adults from several countries who…

A: Given Information: Country A: Sample size (n1) = 1003 Sample proportion (p^1) = 49% = 0.49 Country…

Q: The ages of the 5 officers for a school club are 18, 18, 17, 16, and 15. The proportion of officers…

A: Solution: Given information: p = 0.6 Population proportion.  To check whether the sample proportion…

Q: What is the relationship between the population mean and the mean of the distribution of sample…

A: Mean is the avg. of the given numbers.

Q: A sample of n = 5 scores has a mean of M = 12. If one person with a score of X = 8 is added to the…

A: Given n = 5 mean = 12

Q: 4. What is the range of data values that would allow 99% of the fall within the mean? 5. Why does…

A: “Since you have mentioned the question number 4 and 5, we will solve that question for you. If you…

Q: Is there a significant relationship between income and the level of work adjustment of the…

A:

Q: If you want to be 99% confident of estimating the population proportion to within a sampling error…

A: Given information Error = 5% = 0.05 Confidence level = 0.99

Q: If you want to be 99​% confident of estimating the population proportion to within a sampling error…

A: From the provided information, Confidence level = 99% Margin of error (E) = ±0.05 Proportion (p) =…

Q: 1. What is the difference between the t-statistic you calculate from your sample and teritical that…

A: We have given that the statement about t-statistic calculated from the sample and t-critical value…

Q: The claim is that the proportion of peas with yellow pods is equal to 0.25​ (or 25%). The sample…

A: Given that, x=117,n=450,p=0.25 The sample proportion is,

Q: . NCAE shows that the average score of the students is 80 and sd is 15.  What is

A: From the given information, μ=80σ=15

Q: A sample size of _is needed.?

A: Here use formula of margin of error

Q: The weights in ounces of a sample of running shoes for men and women are shown. If we want to test…

A: The mean significance is tested for the larger population by taking samples into accounts using the…

Q: By how many times does the sample size have to be increased to decrease the margin of error by a…

A: Need to find By how many times does the Sample size have to be increased to decrease the margin of…

Q: - What percentage of guesses fell between z-scores of -1.0 to +2.0?

A:

Q: what is the relative frequency of yields in sample A that were greater than 21.5 and less than or…

A: The formula for relative frequency(RF) is given by: RF = number of sucessful trialsTotal number of…

Equations and Inequations

Equations and inequalities describe the relationship between two mathematical expressions.

Linear Functions

A linear function can just be a constant, or it can be the constant multiplied with the variable like x or y. If the variables are of the form, x2, x1/2 or y2 it is not linear. The exponent over the variables should always be 1.