Consider the data to the right from two independent samples.
Construct a
90 |
% confidence interval to estimate the difference in population means.Click here to view page 1 of the standard normal table.LOADING... Click here to view page 2 of the standard normal table.LOADING... |
|
equals
43
x overbar 2
equals
51
sigma 1 |
equals
10
sigma 2
equals
14
n 1 |
equals
35
n 2
equals
40
The confidence interval is
left parenthesis nothing comma nothing right parenthesis
.
(Round to two decimal places as needed)
Consider the data to the right from two independent samples. Construct a 90 % confidence interval...
Consider the hypothesis statement to the right using alpha equals0.10 and the data to the right from two independent samples. a) Calculate the appropriate test statistic and interpret the result. b) Calculate the p-value and interpret the result. Click here to view page 1 of the standard normal table. LOADING... Click here to view page 2 of the standard normal table. LOADING... H0: mu 1minusmu2less than or equals 0 H1: mu 1minusmu2greater than 0 x overbar 1 equals 87 x...
Construct the indicated confidence interval for the population mean mu μ using the t-distribution. Assume the population is normally distributed. c equals = 0.90 0.90, x overbar x equals = 14.1 14.1, s equals = 4.0 4.0, n equals = 6 6 The 90 90% confidence interval using a t-distribution is left parenthesis nothing comma nothing right parenthesis . , .
Consider the following data from two independent samples with equal population variances. Construct a 99% confidence interval to estimate the difference in population means. Assume the population variances are equal and that the populations are normally distributed. x overbar 1 equals= 37.1 x overbar 2 equals= 32.8 s 1 equals= 8.68 S2 equals= 9.59 N1 equals= 15 N2 equals= 16 The 99% confidence interval is ( )(. ).
Construct a 90% confidence interval to estimate the population mean using the data below. x=90 σ=10 n=40 N=400 The 90% confidence interval for the population mean is left parenthesis nothing comma nothing right parenthesis,.
A sample mean, sample size, population standard deviation, and confidence level are provided. Use this information to complete parts (a) through (c) below. x overbarx equals=25, n equals=38, sigma σ equals=4 confidence level equals=95% Click here to view page 1 of the standard normal distribution table. LOADING... Click here to view page 2 of the standard normal distribution table. LOADING... . Use the one-mean z-interval procedure to find a confidence interval for the mean of the population from which the...
and i need help finding the upper bound confidence interval as well Construct a confidence interval of the population proportion at the given level of confidence. x = 120, n = 1200, 95% confidence Click here to view the standard normal distribution table (page 1). Click here to view the standard normal distribution table (page 2). The lower bound of the confidence interval is LI. (Round to three decimal places as needed.)
Construct a confidence interval of the population proportion at the given level of confidence. x = 860, n= 1100, 95% confidence Click here to view the standard normal distribution table (page 1). Click here to view the standard normal distribution table (page 2). The lower bound of the confidence interval is (Round to three decimal places as needed.) The upper bound of the confidence interval is (Round to three decimal places as needed.)
A) Construct the confidence interval for the population mean μ. c=0.98, (overbar) x=7.6, σ =0.7 and n=48 A 98% confidence interval for μ is ( , ) B) Construct the confidence interval for the population mean μ. c=0.90 (overbar) x=16.2, σ=2.02 and n=70 A 90% confidence interval for μ is ( , ) C) Use the confidence interval to find the margin of error and the sample mean. left parenthesis 0.144 comma 0.280 right parenthesis (0.144,0.280) The margin of error is...
Use the one-mean t-interval procedure with the sample mean, sample size, sample standard deviation, and confidence level given below to find a confidence interval for the mean of the population from which the sample was drawn. x overbarxequals=2.0 nequals=51 sequals=4.5 confidence levelequals=95% Click here to view page 1 of the table of critical values for the t distribution. LOADING... Click here to view page 2 of the table of critical values for the t distribution. LOADING... The 95% confidence interval...
The grade point averages (GPA) for 12 randomly selected college students are shown on the right. Complete parts (a) through (c) below. Assume the population is normally distributed. 2.2 3.2 2.5 1.6 0.6 4.0 2.3 1.3 3.6 0.3 2.3 3.4 a) Find the sample mean. x overbar x equals= (Round to two decimal places as needed.) (b) Find the sample standard deviation. s equals= (Round to two decimal places as needed.) (c) Construct a 95% confidence interval for the population...