BUS 204 Business statics

BUS 204 Week 13 Assignment | MiraCosta College1.In the hypothesis test to determine if ergonomic keyboards increase the average words per minute, what was the critical value for this upper tailed test? Round your answer to two decimal places.2.822.822.To perform a test of the null and alternative hypotheses shown below, random samples were selected from the two normally distributed populations with equal variances. The data are shown below. Test

BUS 204 Week 12 Assignment |MiraCosta College1. In the simple linear regression problem in the lecture videos, what is the COEFFICIENT of the SLOPE (for the store size in square feet)? Round your answer to two decimal places. 25.32 2. federal law requires periodic testing in standard subjects. A random sample of 66 junior high school students from a certain city was selected, and each student's scores on a standardized mathematics examinat

BUS 204 Week 12 Quiz |MiraCosta CollegeQuestion 1A dependent variable is the variable that we wish to predict or explain in a regression model. True False Question 2When a correlation is found between a pair of variables, this always means that there is a direct cause and effect relationship between the variables. True FalseQuestion 3Assume that a medical research study found a correlation of -0.73 between consumption of vitamin A and the cancer

BUS 204 Week 11 Quiz | MiraCosta CollegeQuestion 1Which of the following statements is true? Alpha and beta are directly related such that when one is increased the other will increase also. The alternative hypothesis should contain the equality. Alpha represents the probability of making a Type II error. The decision maker controls the probability of making a Type I statistical error.Question 2If an economist wishes to determine whether there is

BUS 204 Week 10 Assignment | MiraCosta College1. In the Bed Bath and Beyond practice problem, what is the MARGIN OF ERROR for the population proportion? Round your answer to four decimal places. 0.1067 2. Determine the 80% confidence interval estimate for the population mean of a normal distribution given n=121, σ=135, and x=1,300. The 80% confidence interval for the population mean is from to (Round to two decimal places

BUS 204 Week 10 Quiz | MiraCosta CollegeQuestion 1Which of the following statements applies to a point estimate? The point estimate will tend to be accurate if the sample size exceeds 30 for non-normal populations. The point estimate is needed to determine the required sample size when estimating the population mean. The point estimate is a parameter. The point estimate is subject to sampling error and will almost always be different from the pop

BUS 204 Week 9 Assignment |MiraCosta CollegeQuestion 1The distribution for the number of emergency calls to a city's 911 emergency number in a one-hour time period is likely to be described by a: binomial distribution. continuous distribution hypergeometric distribution. Poisson distribution.Question 2The number of customers who post a positive Yelp review for a restaurant per month is an example of: Complex Random Variable Continuous Random Va

BUS 204 Week 8 Assignment | MiraCosta College1.In practice problem #23, what is the STANDARD ERROR (also known as the Standard Deviation of Sample Means)? Round your answer to two decimal places. 81.322.An Internet service provider states that the average number of hours its customers are online each day is 2.64. Suppose a random sample of 14 of the company's customers is selected and the average number of hours that they are online each day is m

BUS 204 Week 8 Quiz | MiraCosta CollegeQuestion 1Sampling error is the difference between the sample statistic and the population parameter. True FalseQuestion 2Suppose the mean balance of checking accounts at Regions Bank is known to be $4320. A random sample of 10 accounts yields a total of $41,490. This means the sampling error is -$171. True FalseQuestion 3When sampling from a population, the sample mean will: always be closer to the populati

BUS 204 Week 7 Assignment | MiraCosta CollegeReviewHomework:Chapter 6 Homework1.In part b of the Standard Normal Distribution practice problem, what is the probability that x is < 90? Round your answer to four decimal places. 0.30852.For a normally distributed population with μ=300 and σ=10, determine the standardized z-value for each of the x-values below.a. x=320b. x=295c. x=3503.For a standardized normal distribution, calculate the probabil