13The t-score to find the margin of error for a 95% interval estimate of the population slope parameter β₁ is, a2.222 b2.116 c2.015 d1.919 A life insurance company wishes to examine the relationship between the amount of life insurance held by afamily and family income. From a random sample of households, the company collected the accompanyingdata. The data are in units of thousands of dollars.INSURINCOME973814129Lety =INSUR28075X3DINCOME3038145313735777199432515380718414745272705371285271172455548311667320419446154511634828069507140464136321718732064761445741112516549713082617113332259822817344614633277219482085518048169422736950212754712628180428143370772214921451

The independent variable is INCOME. The dependent variable is INSUR. We have to find the t score…

Answered: A life insurance company wishes to…

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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Taylor Swift is interested in learning what proportion of her fans want her to re-record her masters, so she takes a simple random sample of 500 fans and asks them. Of the 500 fans, 487 of them (97.4%) respond that they want her to re-record all of her masters. What is the parameter and what is its value? a. The parameter is the average number of all Taylor Swift fans who want her to re-record her masters, which is unknown. b. The parameter is the proportion of the sampled Taylor Swift fans who want her to re-record her masters, which is unknown. c. The parameter is the group of the sampled Taylor Swift fans who want her to re-record her masters, which is 487. d. The parameter is the proportion of the sampled Taylor Swift fans who want her to re-record her masters, which is 0.974. e. The parameter is the proportion of all Taylor Swift fans who want her to re-record her masters, which is unknown. f. The parameter is the proportion of all…
A large automobile insurance company selected samples of single and married male policyholders and recorded the number who made an insurance claim over the preceding three-year period. Single Policyholders Married Policyholders n1=550 n2=1,000 Number making claims = 110 Number making claims = 150 a. Use a=0.05 Test to determine whether the claim rates differ between single and married male policyholders. z-value (to 2 decimals) p-value (to 4 decimals) b. Provide a 95% confidence interval (to 4 decimals) for the difference between the proportions for the two populations. Enter negative answer as negative number. ( , )
The histogram of the number of hours of sleep Stat 100 students reported getting each night roughly follows the normal curve with an average of 7.0 hours and a SD of 1.2 hours. a. Approximately 68% of the students sleep between hours and hot (Put the smaller number first) 提交答案|Tries 0/5 b. Approximately 95% of the students sleep between hours and hours. (Put the smaller number first) 提交答案| Tries 0/5 c. If a student sleeps 5.2 hours per night what percent of the people sleep more than her? Do the problem in steps: I. First, find the Z score = 提交答案|Tries 0/3 ii. Now, move the red vertical line on the following graph to the correct Z score by clicking and dragging the mouse. If you are using a touch screen, touch and then slide the region around the vertical line 1.00 Shade the region representing the percent of people who sleep more than her: Shade the region under the normal curve to the O left of the red vertical line O right of the red vertical line
A large automobile insurance company selected samples of single and married male policyholders and recorded the number who made an insurance claim over the preceding three-year period. Z-value p-value Single Policyholders n₁ = 440 Number making claims = 88 a. Use a = 0.05. Test to determine whether the claim rates differ between single and married male policyholders. (to 2 decimals) (to 4 decimals) X Married Policyholders n2 = 840 Number making claims 126 We can conclude ✔ that there is the difference between claim rates. b. Provide a 95% confidence interval (to 4 decimals) for the difference between the proportions for the two populations. Enter negative answer as negative number. X * )
Carboxyhemoglobin is formed when hemoglobin is exposed to carbon monoxide. Heavy smokers tend to have a high percentage of carboxyhemoglobin in their blood.t Let x be a random variable representing percentage of carboxyhemoglobin in the blood. For a person who is a regular heavy smoker, x has a distribution that is approximately normal. A random sample of n = 12 blood tests given to a heavy smoker gave the following results (percent carboxyhemoglobin in the blood). Note: For degrees of freedom d.f. not in the Student's t table, use the closest d.f. that is smaller. In some situations, this choice of d.f. may increase the P-value a small amount and thereby produce a slightly more "conservative" answer. 9.1 9.8 10.4 9.8 11.3 12.2 11.6 10.3 8.9 9.7 13.4 9.9 (a) Use your calculator to calculate x and s. (Round your answers to four decimal places.) X = S = (b) A long-term population mean u = 10% is considered a health risk. However, a long-term population mean above 10% is considered a…
Find the closest z-score from the table that yields the given proportion: P(z )= 0.3299 Note: You can earn partial credit on this problem.
A light bulb manufacturer guarantees that the mean life of a certain type of light bulb is at least 875 hours. A random sample of 45 light bulbs has a mean life of 858 hours with a standard deviation of 45 hours. Do you have enough evidence to reject the manufacturer's claim? Use a= 0.04. (a) Identify the null hypothesis and alternative hypothesis. O A. H,: µ 858 O F. H : μ= 858 H: u# 858 a
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A student wants to determine if there is a difference in the pricing between two stores for health and beauty supplies. She recorded prices from both stores for each of 10 different products. Assuming that the conditions for conducting the test are satisfied, determine if there is a price difference between the two stores. Use the α = 0.1 level of significance. Complete parts (a) through (d) below. A B C D E F G H I J 5.95 7.41 3.76 1.74 1.78 2.88 4.72 3.13 2.98 3.75 Store 1 Store 5.97 7.95 3.94 1.78 1.92 2.49 4.71 3.74 2.95 3.69 2 (a) What type of test should be used? Choose the correct answer below. A. A hypothesis test regarding the difference of two means using a matched-pairs design. B. A hypothesis test regarding two population standard deviations. OC. A hypothesis test regarding the difference between two population proportions from independent samples. OD. A hypothesis test regarding the difference of two means using Welch's approximate t. (b) Determine the null and alternative…
Find the z-score that has 62.2% of the distribution's area to its right

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13	The t-score to find the margin of error for a 95% interval estimate of the population slope parameter β₁ is,

a	2.222
b	2.116
c	2.015
d	1.919