Use the following information to answer the two exercises: The following data are the results of a random survey of 110respondents about their shopping behaviour. The question was: How often do you go grocery shopping per week?Construct a 95% confidence interval for the true population mean number of grocery shoppings. Assume the underlyingpopulation is approximately normal. The sample variance calculated from the frequency table is 1,5.Number ofFrequencyshoppings11127233320419а. (2,0; 2,5)b. (1,8; 2,3)c. (1,9; 2,5)d. (1,8; 2,4)

Given that X Frequency 0 11 1 27 2 33 3 20 4 19 Total 110 Sample variance=1.5…

Answered: Use the following information to answer…

MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

Section: Chapter Questions

Problem 1P

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1. Which of the following is a measure of central tendency? a. Quartiles b. Percentiles c. Standard deviation d. Median 2. If the variance of a sample is 9, the standard deviation is: a. 9 b. 3 c. -3 d. 81 3. What is the range for the following numbers? 83, 54, 48, 60 a. 83 b. 54 с. 57 d. 35 Q,- Q. 2 4. If Qı, Q2, and Q3 represents the quartiles of a given set of data what does represent? a. The First Quartile b. The Second Quartile c. The Interquartile Range d. The Third Quartile 5. A financial analyst's sample of six companies' book value for last financial year are: $25, $7, $22, S33, S18, $15.The sample mean and sample standard deviation are (approximately): a. 20 and 79.2 respectively b. 20 and 8.9 respectively. c. 120 and 79.2 respectively. d. 20 and 8.2 respectively.
A gardener was doing a study on the number of roses produced from a random sample of rose bushes. The following data represents the number of roses from his sample: 8 7 8 5 9 8. 6 7 7 10 14 Find the following statistical values to represent his data: a) The mean: (round to 1 decimal) b) The median: c) The mode: d) The sample standard deviation: (round to 1 decimal) e) The range:
John is interested in the number of children per household for house-holds in Tyler, TX. He conducts several phone interviews and collects the following data: 0 3 2 0 2 1 1 0 6 1 (a.) Find the mean, median, and 10%-trimmed mean. (Handwritten) (b.) Find the upper and lower quartiles. (Handwritten) (c.) Find the range, sample variance, sample standard deviation, and interquartilerange. (Handwritten)
The data from an independent-measures research study produce a sample mean difference of 4 points and a pooled variance of 16. If there are n = 8 scores in each sample, then what is the estimated standard error for the sample mean difference? Select one: O a. 4 O b. 16 O c. 128 O d. 2
An arborist is interested in determining the mean diameter (in centimeters) of mature white oak trees at a certain height above the base. She measures 7 of these trees and finds the following sample statistics: F = 49.09 and s = interval for the mean diameter of a mature white oak tree. 13.80. Construct a 95% confidence
Problem #4: Students with the last name of P-T: In 2008, the per capita consumption of soft drinks in Country A was reported to be 18.18 gallons. Assume that the per capita consumption of soft drinks in Country A is approximately normally distributed, with a mean of 18.18 gallons and a standard deviation of 4 gallons. Please review Section 7.3. Calculate Z and round to two decimal places for each. Then use technology or a table of values from the cumulative standardized normal distribution to find the probability. Pay attention to each question, as technology calculates area to the left and the table shows area to the left. Show all work. What is the probability that someone in Country A consumed more than 13 gallons of soft drinks in 2008? (Round to four decimal places as needed.) What is the probability that someone in Country A consumed between 6 and 9 gallons of soft drinks in 2008? (Round to four decimal places as needed.) What is the probability that someo in Country A consumed…
a. 14.0, 16.3, 18.7, 19.9, 21.3 b. 16.1, 13.4, 13.6, 14.9, 14.1, 10.5 Construct the 95% confidence interval for the difference in u of the two given samples.
3. Given the following GPA for 4 students: 2, 3, 3, 4. Age of students are: 10, 11,12, 15. There are 10,000 total students. Average GPA: Unknown, StandardDeviation of GPA: 0.02 and it’s Normal.a. Find the mean and standard deviation for GPA.b. Calculate a 95% confidence interval for the populations mean GPA.c. Use Correlation formula to find r between GPA and Age.d. Find Regression Line Equation.e. If a student’s age is 13, what is the corresponding GPA?
Answer Q.1
ANSWER LETTER D,E,F only
do B AND C
Given two independent random samples with the following results: n₁ = 16 n₂ = 8 x₁ = 94 X2: $₁ = 16 = 124 $2 = 28 Use this data to find the 90% confidence interval for the true difference between the population means. Assume that the population variances are equal and that the two populations are normally distributed. Copy Data Step 2 of 3: Find the margin of error to be used in constructing the confidence interval. Round your answer to six decimal places.

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