1 Not yet answered Marked out of 1.00 A small electronics store has begun to advertise in the local newspaper. Before advertising, the long-term average weekly sales were $9,820. A random sample of 50 weeks while the newspaper ads were running gave a sample mean weekly sales of $10,960. Does this indicate that the population mean weekly sales is now di\u0002erent than $9,820? Test at the 5% level of signi cance. Assume the population standard deviation= $1,580. State the null and alternate hypotheses. Flag question Select one: a. H0:=9,820;H1: <9,820 b. H0:=9,820;H1: >9,820 c. H0:=9,820;H1: 9,820 d. H0:=10,960;H1: >10,960 e. H0:>9,820;H1: =9,820 Question 2 Not yet answered Marked out of 1.00 Flag question A small electronics store has begun to advertise in the local newspaper. Before advertising, the long-term average weekly sales were $9,820. A random sample of 50 weeks while the newspaper ads were running gave a sample mean weekly sales of $10,960. Does this indicate that the population mean weekly sales is now more than $9,820? Test at the 5% level of signi cance. Assume the population standard deviation= $1,360. Compute the z or t value of the sample test statistic. Select one: a. z=-5.23 b. z=3.74 c. t=4.21 d. z=5.93 e. t=3.74 Question 3 Not yet answered Marked out of 1.00 Flag question The average annual salary of employees at Wintertime Sports was $28,750 last year. This year the company opened another store. SuppoThe se that a random sample of 23 employees gave an average annual salary of $25,810. Assume the population standard deviation is $4230. When using a 1% level of signi cance to test the claim that the average annual salary for all employees is less than last year's average salary. Find the P value or an interval containig the P value for the sample test. Select one: a. P value < 0.01 b. P value < - 0.05 c. P < 0.005 d. P value > 0.01 Question 4 Not yet answered Marked out of 1.00 Flag question Results from previous studies showed that 79% of all high-school seniors from a certain city plan to attend college after graduation. A random sample of 200 high-school seniors from this city showed that 162 plan to attend college. Does this indicate that the percentage has increased from that of previous studies? Test at the 1% level of signi cance. Find the critical value(s): Select one: a. z0=1.645 b. t0=2.33 c. z0=2.33 d. t0=2.58 e. z0=1.96 Question 5 Not yet answered Marked out of 1.00 Flag question Alan is doing a one tailed statistical test in which the critical z value is 2.58. If the results of his test produce a z value of 2.45, he should Select one: a. not reject H0. b. reject H0 c. cannot be determined. Next